Vol. 1, No.2 (2000)

By | July 26, 2014

Titles of research papers/articles published in ROC Vol. 1, No. 2, 2000. For full text, please contact to Editor-in-Chief at info@cropresearch.org.


1. GOPAL SINGH, L. L. SOMANI AND K. L. TOTAWAT [Effect of integrated nitrogen management on yield attributing characters and yield of wheat]. Res. on Crops 1 (2) : 123-127 (2000). Department of Agricultural Chemistry and Soil Science, Rajasthan College of Agriculture, Udaipur-313 001 (Rajasthan), India

ABSTRACT

A field experiment involving three sources of nitrogen (chemical, organic and chemical+organic), three levels of nitrogen (50, 75 and 100% of the recommended dose), with and without Azotobacter inoculation was carried out on a Typic Haplustalfs of Udaipur using wheat as a test crop. Application of N through organic manure followed by integrated use of chemical+organic source and increasing level of N led to significant improvement in yield attributes and yield of wheat and uptake of N by grain and straw. Inoculation with Azotobacter also improved yield attributes, yield and uptake of N over no inoculation.

2. V. K. SURI AND T. S. VERMA [Nutrient efficiencies and their evaluation in maize (cv. Parvati) and wheat (cv. Aradhana) on farmers’ fields for prescription based fertilizer recommendations]. Res. on Crops 1 (2) : 128-132 (2000). Department of Soil Science, H. P. Krishi Vishvavidyalaya, Palampur-176 062 (H. P.), India

ABSTRACT

The nutrient requirement per quintal of grain production, efficiency of soil available and applied fertilizer nutrients have been determined and given for maize and wheat in the wet temperate zone of Himachal Pradesh alongwith fertilizer adjustment equations. Using these fertilizer equations, 17 and 11 field experiments with maize (cv. Parvati) and wheat (cv. Aradhana), respectively, were conducted at various locations in cultivators’ fields. Results clearly revealed that it was possible to target maize (Parvati) yield upto 50 q ha-1 and wheat (Aradhana) yield upto 40 q ha-1.

3. K. S. P. RAO AND CH. MUKUND RAO [Influence of time of harvest on yield and quality of medium duration sugarcane varieties]. Res. on Crops 1 (2) : 133-137 (2000). ANGRAU Sugarcane Research Station, Rudrur-503 188 (A. P.), India

ABSTRACT

Two medium duration sugarcane varieties CO 7219 and 85R 186 were tested for optimum time to harvest from 3rd week of December to 3rd week of February at fortnighly intervals for three consecutive years from 1993-94 to 1995-96 at the Sugarcane Research Station, Rudrur in A. P. The two varieties produced equivocal cane yield but the commercial cane sugar production was significantly more in CO 7219 than 85R 186 in the three years. It had significantly more brix and sucrose percentages but low glucose percentage than 85R 186. The ideal time to harvest sugarcane was 3rd week of December for maximum cane yield and commercial cane sugar. The delayed harvest until 1st week of January did not reduce the cane yield significantly in two out of three years but the commercial cane sugar reduced significantly in the three years. The harvest time had no consistent influence on the corrected brix, glucose or sucrose percentage.

4. S. ANBALAGAN, A. KALAMANI AND M. SAKILA [In vitro propagation of sugarcane : Nature of callus, direct regeneration, regeneration through callus and morphological variations]. Res. on Crops 1 (2) : 138-140 (2000). Department of Agricultural Botany, Agricultural College and Research Institute, Madurai-625 104 (Tamil Nadu), India

ABSTRACT

Studies on in vitro propagation of sugarcane with MS media revealed that two types of calli viz., loose, friable and white, compact nodular calli developed from leaf explants-induction. The optimum concentrations of plant growth regulators for regeneration were MS+NAA (0.5 mg l-1), kinetin (1.0 mg l-1) and MS+NAA (1.0 mg l-1)+kinetin (2.0 mg l-1). A very high concentration of auxin (NAA) or a combination of two auxins (NAA and IAA) promoted rooting. Morphological variants in the form of albinos appeared during regeneration.

5. S. ANBALAGAN, A. KALAMANI AND M. SAKILA [In vitro mutagenesis in sugarcane]. Res. on Crops 1 (2) : 141-144 (2000). Department of Agricultural Botany, Agricultural College and Research Institute, Madurai-625 104 (Tamil Nadu), India

ABSTRACT

Calli from five sugarcane varieties viz., CoSi 95071, Co 8021, CoSi 96071, CoG 93076 and CoC 92061 were irradiated with 60Co gamma rays with seven different doses ranging from 1 to 4.0 KR. The variety CoG 93076 exhibited maximum regeneration and shoot production, while the dose that resulted in maximum regeneration and shoot production was 3.0 KR.

6. R. A. SHARMA AND DEEPESH SHARMA [Effect of dosages and time of application of chlorimuron ethyl (kloben 25 WP) on weed control in soybean [Glycine max (L.) Merrill]. Res. on Crops 1 (2) : 145-152 (2000). AICRPDA College of Agriculture, Indore-452 001 (M. P.), India

ABSTRACT

Bioefficacy of chlorimuron ethyl (Kloben 25 WP) @ 6, 9 and 12 g a. i./ha applied at 3, 5, 7, 10, 15 and 20 days after sowing (DAS) for weed control in soybean was evaluated in field trials at two locations i. e. Indore and Jabalpur in the State of Madhya Pradesh. It was compared with pendimethalin @ 1000 g a. i./ha at 1 DAS and a weedy control. Chlorimuron ethyl (CE) at all the dosages and stages of application effectively controlled all broad leaf weeds and sedges. At Indore (Western M. P.), where broad leaf weeds dominated the fields, CE when applied earlier viz., 3 to 10 DAS effectively controlled grassy weeds like Echinochloa spp., Digitaria spp. and Dinebra spp. Its efficacy against grasses goes down with the advancement of application stage viz., 15 and 20 DAS. At Jabalpur (Central M. P.), where the intensity of grassy weeds was high, the efficacy of CE against grasses was moderate to low; however, earlier applications were superior to later applications. CE regardless of dosages reduced the weed biomass as compared to weedy control. The weed control efficiency was in the range of 71.33 to 87.94% as against 42.98% under pendimethalin at Indore. However, at Jabalpur it was in the range of 34.59 to 74.34% as against 56.33% under pendimethalin. At both the locations, earlier applications of CE resulted in significantly higher yields of soybean than pendimethalin; however, later applcations were found to be at par.

7. POORAN CHAND, M. GOVARDHAN AND M. SUJATHA [Effect of dates of sowing on performance of mustard varieties]. Res. on Crops 1 (2) : 153-155 (2000). ANGRAU Regional Agricultural Research Station, Palem-509 205, India

ABSTRACT

An experiment with three dates of sowing, six mustard varieties (Vardhan, Varuna, Sita, GM-1, Pusa bold, Kranti and toria Bhawani, PT 303 and Divya) was conducted during rabi seasons of 1993, 1994 and 1995. With delay in sowing from October 8 to October 23 and November 8, there was per cent yield reduction. Among cultivars tested, GM-1 registered significantly higher yield. Interaction between dates of sowing and cultivars was significant. The first week of October was found to be optimum time for mustard sowing in Northern Telangana Zone of Andhra Pradesh.

8. P. KALAISELVEN, K. SUBRAHMANIYAN AND N. ARULMOZHI [Evaluation of different Rhizobium strains for groundnut (Arachis hypogaea L.)].Res. on Crops 1 (2) : 156-158 (2000). TNAU Regional Research Station, Vridhachalam-606 001, India

ABSTRACT

A field experiment was conducted during rabi 1995-96 to 1997-98 to study the performance of different rhizobium strains on the root nodulation, dry weight of nodules, yield attributes and yield of groundnut. Seven strains of Rhizobium from groundnut crop were evaluated. The pooled results revealed that all the strains produced significantly higher nodules/plant, dry weight of nodules and dry pod yield of groundnut over uninoculated control under irrigated condition. Among the different strains tried, TNAU 14, ICG 40 and NC 92 were found to be superior.

9. G. MANICKAM, P. GNANAMOORTHY, R. DURAI AND K. SUBRAHMANIYAN [Nutrient uptake by crop and weeds as influenced by integrated weed management practices in groundnut (Arachis hypogaea L.) based cropping system]. Res. on Crops 1 (2) : 159-162 (2000). TNAU Regional Research Station, Vridhachalam, India

ABSTRACT

Field investigations were conducted to evaluate the efficacy of integrated weed management practices on nutrient uptake and dry matter production of weeds and crops under groundnut based intercropping system. Pre-sowing blanket application of glyphosate @ 1.0% effectively limited nutrient uptake and dry matter production of weeds and resulted in better nutrient uptake of crops with an increase of 7.6, 50.0 and 13.6%, respectively in total N, P and K over untreated control. Groundnut+greengram intercropping accounted appreciable improvement in nutrient uptake crops with 183.5 kg/ha in N, 4.7 kg in P and 58.1 kg/ha in K through effective reduction in weed uptake and dry matter production. Similarly, pre-emergence application of metolachlor @ 1.0 kg a. i./ha+one hand weeding on 30 DAS significantly registered the maximum nutrient uptake and DMP of crops.

10. R. K. TIWARI, K. N. NAMDEO AND GIRISH JHA [Effect of nitrogen and sulphur on growth, yield and quality of sesame (Sesamum indicum) varieties]. Res. on Crops 1 (2) : 163-167 (2000). Department of Botany, Government Model Science College, A. P. S. University, Rewa-486 001 (M. P.), India

ABSTRACT

A field experiment was conducted during rainy (kharif) seasons of 1996 and 1997 to study the effect of nitrogen and sulphur on sesame (Sesamum indicum L.) varieties under rainfed conditions. Growth characters and yield attributes were found significantly higher at the highest level of 60 kg N/ha and 30 kg S/ha. TKG 21 grown with 60 kg N/ha and 30 kg S/ha produced the maximum (7.02 q/ha) with oil production of 4.37 q/ha and net returns of Rs. 13,409/ha. TKG 21 recorded 51.34% seed oil and 28.30% seed protein. Seed oil decreased and seed protein increased significantly due to applied N, while applied S enhanced both the contents significantly.

11. N. S. THAKUR, S. K. PANNASE AND S. N. SHARMA [Effect of sowing time and fertilizer on growth, yield attributes and seed yield of niger (Guizotia abyssinica Cass) under rainfed condition]. Res. on Crops 1 (2) : 168-170 (2000). Zonal Agricultural Research Station, Chhindwara-480 001 (M. P.), India

ABSTRACT

Field experiments were conducted under rainfed condition during kharif seasons for four years 1993-96 at Chhindwara (M. P.) to find out suitable sowing date and fertilizer dose for niger (Guizotia abyssinica Cass). Sowing on 20 July was the best for seed yield mainly due to superiority in branches/plant, capitula/plant and test weight. Both early and delayed sowings significantly reduced the seed yield and net profit. Each successive increase in fertility levels significantly increased the yield attributes and seed yield upto the highest level 40 : 40 : 20 kg NPK/ha, but returns and benefit : cost ratio increased upto 20 : 20 : 10 kg NPK/ha.

12. N. S. THAKUR, S. k. PANNASE AND S. D. SAWARKAR [Stability in productivity and economic viability of kharif crops under rainfed conditions]. Res. on Crops 1 (2) : 171-175 (2000). Zonal Agricultural Research Station, Chhindwara-480 001 (M. P.), India

ABSTRACT

A field experiment was conducted for four consecutive years i. e. 1993-96 at Research Farm, Chhindwara to evaluate the stability of yield and economic viability of kharif crops under rainfed condition. Results revealed that productivity of pigeonpea, sunflower and maize was more stable than other rainy season crops like soybean, groundnut, sesame and sorghum. Early sowing (30 June) proved to be the best time for sowing for all the crops in this regard and most advantageous in respect of productivity and monetary returns (Rs. 17619/ha). Amongst rainy season crops, pigeonpea being the most beneficial crop recorded maximum gross returns (Rs. 22606/ha) followed by groundnut and soybean. The highest gross returns of Rs. 31282/ha were obtained with groundnut crop sown on 30 June.

13. A. CHATTOPADHYAY AND B. C. SAHANA [Response of okra seed crop to nitrogen and phosphorus fertilization in acidic soil of Old Alluvial Zone, West Bengal]. Res. on Crops 1 (2) : 176-180 (2000). B. C. K. V. Regional Research Station, Majhian, Dakshin Dinajpur-733 133, India

ABSTRACT

The studies on the effect of nitrogen and phosphorus levels on seed production of okra were conducted at Research Farm of Bidhan Chandra krishi Viswavidyalaya Regional Research Station, Majhian, Dakshin Dinajpur, West bengal during the pre-kharif seasons (spring-summer) of 1998 and 1999. Five levels of nitrogen (0, 60, 80, 100 and 120 kg/ha) were tested against four levels of P2O5 (0, 40, 60 and 80 kg/ha) making 20 treatment combinations and were arranged in a randomised block design with three replications. Yield of seed was significantly increased with the application of nitrogen and phosphorus at the rate of 100 and 60 kg/ha, respectively, over rest of the nutrient levels. The application of both nitrogen and phosphorus did not exhibit significant influence on 100-seed weight and germination percentage.

14. RAVINDER KUMAR AND B. K. SRIVASTAVA [Tomato leaf and chlorophyll content as affected by low plastic tunnels]. Res. on Crops 1 (2) : 181-183 (2000). Department of Horticulture, G. B. Pant University of Agriculture & Technology, Pantnagar-263 145 (U. P), India

ABSTRACT

The effect of low plastic tunnels on tomato leaf and chlorophyll content was studied during winter-spring season for two years at Horticultural Research centre, G. B. Pant University of Agriculture & Technology, Pantnagar. Plastic tunnels of any gauge produced significantly higher number of leaves on main shoot as compared to control. Leaf area was significantly higher in all the covered treatments during first year but chlorophyll content remained similar in covered and uncovered treatments. Leaf area was not influenced by perforation intensity, whereas the chlorophyll content increased with the increase in perforation intensity.

15. BINU MATHEW, MD. ABU HASAN, D. MAJUMDAR AND P. K. CHATTOPADHYAY [Effect of post-harvest manipulation of parent pseudostem on yield and fruit morphological characters of first ratoon crop in banana (Musa, AAA, cv. Giant Governor)]. Res. on Crops 1 (2) : 184-188 (2000). Faculty of Horticulture, Bidhan Chandra krishi Viswavidyalaya, Mohanpur-741 252, Nadia (West Bengal) India

ABSTRACT

The present experiment was conducted at the Horticultural Research Station, Mondouri of Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, India to assess the impact of cutting height of parent pseudostem and number of sucker (s)/mat severed/non-severed with the parent pseudostem on yield and fruit morphological characters of first ratoon crop in banana (Musa, AAA) cv. Giant Governor. Retention of untopped mother plant exhibited highest length (20.04 cm), diameter (3.56 cm), weight of finger (127.50 g) and pulp/peel ratio. Retention of connected sucker to untopped parent pseudostem produced heaviest bunches (26.00 kg/plant), while the productivity per hectare was recorded highest (199.4 t/ha) retaining to connected suckers per mat with the parent pseudostem.

16. S. A. BHUYAR, S. G. WANKHADE, J. T. PATURDE AND P. P. KHODE [Seed germination studies in sarpagandha (Rauvolfia serpentina Benth)]. Res. on Crops 1 (2) : 189-191 (2000). Nagarjun Medicinal Plant Garden, Central Research Station, Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola-444 104, India

ABSTRACT

An experiment was conducted to study the effect of different seed treatments on seed germination and seedling growth of Rauvolfia serpentina. Among all the treatments studied, most promising results were obtained when the seeds were dipped in hot water at 800C for 5 min and then cooled down to room temperature. Significant results were also obtained when the seeds were soaked in gibberellic acid (500 ppm) for 24 h and dipped in concentrated sulphuric acid for 2 min.

17. R. A. BALIKAI [Bio-efficacy of imidacloprid 70 WS against sorghum shootfly in rabi season]. Res. on Crops 1 (2) : 192-195 (2000). U. A. S. Regional Research Station, Bijapur-586 101 (Karnataka), India

ABSTRACT

Field trial was conducted during rabi 1997-98 at the Regional Research Station, Bijapur to evaluate a new insecticide, imidacloprid 70 WS as seed dresser against sorghum shootfly, Atherigona soccata Rondani. The results indicated that seed dressing with imidacloprid 70 WS @ 7.0% gave excellent control of shootfly and produced higher seed yield followed by imidacloprid 70 WS @ 5.25% and both were on par with each other. Seed soaking in endosulfan 35 EC @ 0.07%+CaCl2 @ 2% was on par with imidacloprid 70 WS @ 0.35, 0.7, 1.4, 2.1, 2.8 and 3.5% and soil application of carbofuran 3 G @ 0.9 kg a. i./ha with respect to shootfly control, while it was on par with imidacloprid 70 WS @ 0.14, 0.35, 0.7, 1.4, 2.1, 2.8, 3.5 and 5.25% and soil application of carbofuran 3 G @ 0.9 kg a. i./ha with respect of grain yield. Further, seed soaking in endosulfan 35 EC @ 0.07%+CaCl2 @ 2% recorded higher cost : benefit ratio (1 : 31.33) and thus served as low cost technology for combating shootfly in rabi sorghum.

18. M. C. DEBNATH, J. N. KHAUND, B. K. BORA AND P. C. SARMAH [The reaction of host plants on the biology of potato tuber moth, Phthorimaea operculella (Zeller)]. Res. on Crops 1 (2) : 196-200 (2000). Regional Agricultural Research Station, Nagaon-782 001 (Assam), India

ABSTRACT

The reaction of the host plants on the major biological parameters of potato tuber moth (PTM), Phthorimaea operculella (Zeller) was studied under laboratory conditions. Among six host plants, solanum tuberosum was found to be most suitable for PTM population development demonstrating shortest larval period (12.44 days) and pupal period (6.52 days), longest adult longevity (female 7.23 days and male 4.88 days) and highest fecundity (105.6). Solanum melongena was the next best suited host plant followed by Lycopersicon esculentum, solanum khasianum and Datura fastuosa. The larvae could not develop upto maturity in Solamum nigrum. The least amount of alkaloid, highest amount of carbohydrate with comparatively low amount of protein are contained in S. tuberosum than other hosts except in L. esculentum. The increased amount in percentage of protein and alkaloidin the host plants showed reduced suitability to the pest.

19. MANTU KUMAR AND R. S. RANA [Bacterial and fungal contaminants of spawn of Agaricus bisporus (Lange) Imbach]. Res. on Crops 1 (2) : 201-204 (2000). Department of Plant Pathology, CCS Haryana Agricultural University, Hisar-125 004, India

ABSTRACT

Fungal and bacterial contaminants posed a major problem in successful production of quality spawn. Bacillus sp. was identified as major contaminant of spawn that overcame the sterilization process and introduced into spawn bottles through wheat grains used as substrates. It caused wet spot disease or rotteness of spawn and contributed to maximum percentage (30.62) of spawn spoilage. Fungal contaminants gained entry into spawn bottles only due to defective inoculation technique, none of them survived sterilization process.

20. MUNU DEVI, J. SHARMA AND ABHIJIT SARMA [In vitro culture of artificial seeds of Vanda coerulea_an endangered orchid]. Res. on Crops 1 (2) : 205-207 (2000). Tissue Culture Laboratory, Department of Botany, St. Anthony’s College, Shillong-793 001, India

ABSTRACT

The research communication reports the production of artificial seeds through encapsulation of protocorm like bodies (PLB’s) of Vanda coerulea_an endangered orchid. Forty days old PLB’s were encapsulated in sodium alginate and cultured on MS medium. Eighty per cent germination was recorded. Artificial seeds stored at 40C for a period of 120 days showed significant reduction in viability. Non-encapsulated PLB’s showed no viability after 30 days at 40C.

21. T. M. GIREESHA, H. E. SHASHIDHAR AND SHAILAJA HITTALMANI [Genetics of root morphology and related traits in an indica-indica based mapping populations of rice (Oryza sativa L.)]. Res. on Crops 1 (2) : 208-215 (2000). Department of Genetics and Plant Breeding, University of Agricultural Sciences, Bangalore-560 065, India

ABSTRACT

Root system constitutes an important component of drought resistance/tolerance. However, genetics of root morphology is not well understood. Hence, this study was taken to estimate various genetic parameters of root and related traits in randomly chosen 99 recombinant inbreds (RILs), derived from progeny of (IR 58821/IR 52561) cross, which constitute a mapping population. Parents and checks viz., Moroberekan, Azucena, IR 64 and Jaya were also studied. Higher heritabilities (broad sense) were found for RTL, RTV, RDW and TRN and lower for RTT. RDW, RTL and RTV showed higher GCV and PCV and hence higher expected GA as per cent of mean. Significant and positive correlations were found among all root traits studied, except root thickness. Transgressants were obtained on higher as well as lower side for different root traits.

22. D. PUNITHA AND T. S. RAVEENDRAN [Studies on metroglyph analysis in interspecific coloured linted upland cotton]. Res. on Crops 1 (2) : 216-220 (2000). Department of Cotton, Tamil Nadu Agricultural University, Coimbatore-641 003 (T. N.), India

ABSTRACT

An experiment was conducted during kharif seasons of 1993-94 and 1994-95 to study the variability through metroglyph technique in coloured linted cotton (Gossypium hirsutum) genotypes. Based on this technique, genetic variability was evaluated for five characters among 53 genotypes. Four district groups were identified and each of them included members showing wide variability for a constellation of characters. The analysis of variation was based on the mean values for different traits. The mean values were used for plotting the genotypes in a graph. Considerable amount of variation between parents and hybrids was found. Metroglyph pattern of 53 genotypes revealed that there was association between genetic variability and geographic diversity in this group of genotypes.

23. JIJI JOSEPH AND A. V. SANTHOSHKUMAR [Genetic analysis of quantitative characters through bi-parental mating in green gram [Vigna radiata (L.) Wilczek]. Res. on Crops 1 (2) : 221-225 (2000). Kerala Agricultural University Krishi Vigyan Kendra, Mele Pattambi (Kerala), India

ABSTRACT

Bi-parental mating was done according to North Carolina Design-1 in F2 generation of five crosses. The analysis of variance indicated presence of adequate genetic variability amongst the treatments, males in sets and females in “males in sets”. Estimated values of genetic variance showed that additive genetic variance was important in determining seed per pod, test weight and seed yield, whereas plant height, branch number and number of pods per plant were determined mostly by dominance genetic variance.The average degree of dominance indicated the presence of over dominance for plant height, branch number and number of pods. Heritability estimates for seeds per pod and test weight were very high. Plant height and branch number showed low heritability values. Genetic gain observed for test weight was 56.58 and 55.82% respectively, due to full-sib selection and mass selection. The per cent increase in seed yield was calculated 21.53 due to full-sib and 9.26 due to mass selection.

24. T. S. SHALINI, R. A. SHERIFF, R. S. KULKARNI AND P. VENKATARAMANA [Correlation and path analysis of Indian mustard germplasm] Res. on Crops 1 (2) : 226-229 (2000). Department of Genetics and Plant Breeding, University of Agricultural Sciences, GKVK, Bangalore-560 065 (Karnataka), India

ABSTRACT

Eighty-one diverse genotypes of Indian mustard were evaluated for the assessment of magnitude of association between the quantitative characters. It was observed that number of siliquae, number of secondary branches, number of primary branches, seeds per siliqua and plant height were highly associated with seed yield and number of siliquae contributed maximum directly, while indirectly via number of siliquae and number of secondary branches. It is suggested that maximum emphasis should be considered for the characters number of siliquae and number of secondary branches per plant, respectively, for the improvement of yield by selection.

25. T. S. SHALINI, R. A. SHERIFF, R. S. KULKARNI AND P. VENKATARAMANA [Variability studies in Indian mustard [Brassica juncea (L.) Czern and Coss]. Res. on Crops 1 (2) : 230-234 (2000). Department of Genetics and Plant Breeding, University of Agricultural Sciences, GKVK, Bangalore-560 065 (Karnataka), India

ABSTRACT

Different parameters were estimated to assess the magnitude of genetic variability in 81 diverse genotypes of Indian mustard (Brassica juncea L.). The analysis of variance indicated the prevalence of sufficient genetic variation among the genotypes for all the 10 characters studied. Genotypic coefficient of variation, estimates of variability and genetic gain were moderate to high for number of siliquae per plant, number of secondary branches per plant and 1000-seed weight which indicated that response to selection would be very high for these yield components ultimately leading to yield improvement in this crop. However, for other characters low coefficient of variation, medium to low heritability and low genetic gain were observed. Hence, number of siliquae per plant, number of secondary branches per plant and 1000-seed weight should be given due weightage while breeding for higher seed yield.

26. G. RAJARAVINDRAN, M. KINGSHLIN AND N. SHUNMUGAVALLI [Combining ability analysis in sesame (Sesamum indicum L.)]. Res. on Crops 1 (2) : 235-238 (2000). Department of Agricultural Botany, Agricultural College and Research Institute, Killikulam-628 252 (Tamil Nadu), India

ABSTRACT

The experimental material consisted of 72 hybrids obtained from nine diverse genotypes. The results revealed that additive gene action was predominant for plant height, secondary branches per plant, capsules per plant, 1000-seed weight and seeds per capsule. CO 1 was the best general combiner for capsules per plant, 1000-seed weight and seeds per capsule. Based on per se performance and sca effect, TMV 6 x DPI 1526 was identified to be superior and promising hybrid for plant height, capsules per plant and seed yield per plant and CO 1 x DPI 1526 for plant height, primary branches per plant and capsules per plant.

27. DIJEE BASTIAN, G. KANDASAMY, M. SAKILA AND N. SHUNMUGAVALLI [Combining ability for yield and components in cowpea]. Res. on Crops 1 (2) : 239-244 (2000). Department of Agricultural Botany, Agricultural College and Research Institute, Killikulam, Vallanad-628 258, India

ABSTRACT

Combining ability analysis, involving 10 lines and three testers, was made in cowpea and studied for 12 quantitative traits. The variance due to gca and sca showed that gene action was predominantly non-additive for all the characters studies. Genotypes V 575, V 381, V 585 and CO 6 were found to be good general combiners. The cross V 575 x CO 6 was observed to have higher sca effects for most of the characters studied.

28. S. k. GULERIA, TASHI DAWA AND B. K. SHARMA [Heterotic performance of soybean [Glycine max (L.) Merrill] crosses in F1 and F2 generations]. Res. on Crops 1 (2) : 245-248 (2000). Department of Plant Breeding & Genetics, Himachal Pradesh Krishi Vishvavidyalaya, Palampur-176 062, India

ABSTRACT

Thirty F1‘s and F2‘s were evaluated alongwith their 13 parents (10 lines and 3 testers) for seven agronomic traits for studying the extent of heterosis. The F1 hybrids gave an average heterosis of 22.06 and 4.38% for seed yield over their respective better parents and best check, respectively. In F1 generation, hybrids which gave more yield were 83.33% over better parents and 56.67% over best check. However, mean heterosis in F2 was 11.45% over better parents and 1.42% over best check, and 56.67 and 53.33% hybrids also exceeding that of better parents and best check, respectively. The increase in pods/plant, primary branches/plant and reduced internode length appeared to be largely responsible for high manifestation of heterosis in both the generations.

29. P. K. PANDEY, M. D. PANDEY AND RAGHAVENDRA SINGH [Response of medium land rice to sowing methods, moisture regimes and nitrogen levels]. Res. on Crops 1 (2) : 249-252 (2000). Department of Agronomy, Banaras Hindu University, Varanasi-221 005, India

ABSTRACT

A field experiment was conducted at N. D. University of Agriculture and Technology, Faizabad during kharif 1996 to find out the effect of different methods of crop establishment, nitrogen levels and moisture regimes on performance of rice. The study indicated that transplanting recorded 22.35% higher grain yield (48.00 q/ha) than line sowing (39.23 q/ha). Irrigation at 7 cm one day after disappearance of ponded water (7 cm 1 DADPW) showed its superiority in terms of grain yield (49.10 q/ha) which was 28.90% superior over rainfed. Application of 150 kg N/ha increased the grain yield of rice by 2.61 q/ha (6.08%) over 120 kg N/ha. Interaction of sowing methods and moisture regimes significantly affected the dry matter accumulation, number of grains/panicle, test weight and straw yield.

30. V. K. RATHEE, S. K. GULERIA AND B. K. SHARMA [Evaluation of maize germplasm against leaf blights]. Res. on Crops 1 (2) : 253-254 (2000). H. P. K. V. Regional research Station, Bajaura-175 125, Kullu (H. P.), India

ABSTRACT

The maize genotypes/lines were evaluated against Turcicum leaf blight and Maydis leaf blight under field conditions. Out of these genotypes, only three viz., AZ 712, AZ 730 and PRO 303 were categorised as highly resistant for both the diseases during the years of study.

31. A. GUPTA, M. P. THAKUR AND P. OUDHIA [Effects of different Homoeopathic drugs prepared from common weeds on radial growth of Oyster mushroom (Pleurotus membranaceus) under in vitro conditions]. Res. on Crops 1 (2) : 255-257 (2000). Department of Plant Pathology, Indira Gandhi Agricultural University, Raipur-492 001, India

ABSTRACT

Due to non-availability of any information about effect of some Homoeopathic drugs prepared from weeds (Achyranthus, Boerrhavia, Calotropis, Cynodon and Solanum) on radial growth of Oyster mushroom (Pleurotus membranaceus), a study was conducted. The selected Homoeopathic drugs were tested at four concentrations (500, 1000, 1500 and 2000 ppm) by incorporating them in the PDA medium using food poisoned technique. Different concentrations of selected Homoeopathic drugs produced significant stimulatory and inhibitory effects on radial growth. Maximum radial growth was noted in case of Solanum at 1000 ppm concentration, whereas 1500 ppm concentration of Calotropis inhibited the growth to the minimum.

32. A. KALAMANI AND M. SAKILA [Assessment of induced genetic variability in M3 generation in rice]. Res. on Crops 1 (2) : 258-260 (2000). Department of Agricultural Botany Agricultural College and Research Institute, Madurai-625 104 (T. N.), India

ABSTRACT

Mutagenesis in white ponni and ponni was induced with gamma rays at 10, 20 and 40 KR. Polygenic variability was studied in M3 generation. The phenotypic and genotypic variances and their coefficient of variation, heritability and genetic advance were at higher magnitude for panicles per plant, grain yield and panicle length at 40 KR in white ponni. If the selection pressure applied at 40 KR of gamma rays, it was found to throw economic mutants.

33. DIJEE BASTIAN, P. RANGASAMY, M. SAKILA AND S. BACKIYARANI [Correlation studies in rice]. Res. on Crops 1 (2) : 261-262 (2000). Department of Agricultural Botany, Agricultural College and Research Institute, Madurai-625 104 (T. N.), India

ABSTRACT

Correlation study was carried out on 16 rice cultivars for grain yield and its components. Grain yield was found to be positively associated with grains per panicle, single panicle weight and number of primary rachis. Significant intercorrelation was noticed between grains per panicle and single panicle weight, leaf area index and single panicle weight, flag leaf length and leaf area index and leaf area index and flag leaf width. Selection for these traits will lead to increased yield.

34. B. VIJAYALAKSHMI AND T. S. RAVEENDRAN [In-ovulo embryo culture of wild diploids of Gossypium]. Res. on Crops 1 (2) : 263-265 (2000). Department of Cotton, Tamil Nadu Agricultural University, Coimbatore-641 003, India

ABSTRACT

A convenient and reliable method for in-ovulo embryo culture of five to seven-day old ovules of three wild Gossypium diploids viz., G. gossypoides, G. triphyllum and G. thurberi was standardized. MS+IAA (0.5 mg l-1)+Kn (1.0 mg l-1)+CH (250 mg l-1)+Adenine sulphate (40 mg l-1) was found to be the best for culture of immature in-ovulo embryos. It took 45-50 days after inoculation for getting a well developed plantlet.