Heterosis and combining ability analysis for yield and its components in Indian mustard (Brassica juncea L. Czern & Coss)     

Priti Gupta  H. B. Chaudhary  Sandeep Kumar Lal 《Frontiers of Agriculture in China》2010,4(3):299-307

Half diallel analysis of eight parents was carried out to identify the high heterotic crosses and their relationship in terms of general and specific combining ability (GCA &; SCA) in Brassica juncea L. Czern and Coss at IARI, New Delhi, during 2007–2008 and 2008–2009. The relative heterosis and heterobeltiosis were observed to be the highest with respect to seed yield per 100 siliquae and days from sowing to 50% flowering in case of cross IC-199715 × IC-199714, EC-289602 × Prakash in the number of primary branches per plant and harvest index, Agra Local × Pusa Bahar in the length of main axis, Poorbijaya × Agra Local in the number of siliquae on main axis and EC-289602 × Pusa Bahar in the biologic yield per plant and seed yield per plant. Different cross combinations exhibited the maximum value of better and mid-parent heterosis for the remaining traits, viz., days to maturity, number of secondary branches per plant, plant height and 1000-seed weight. GCA and SCA variances were significant in all characters. The variance of GCA (σ²g) was observed to be higher from sowing to 50% flowering and maturity in plant height and 1000-seed weight, whereas the variance of SCA (σ²s) was higher in seed yield and other remaining parameters.  相似文献   

Management of Sesbania aculeata Incorporation and Nitrogen on the Performance of Transplanted Rice in Calcareous Soil     

Sanjay Kumar Chaudhary  Shankar Jha  Yogeshwar Singh 《Communications in Soil Science and Plant Analysis》2018,49(14):1739-1749

Two field experiments were conducted to optimize the days for decomposition of dhaincha (Sesbania aculeata) with different nitrogen (N) levels and scheduling in transplanted rice in calcareous soil in a split-plot design with three replications. Incorporation of dhaincha one day before transplanting (1-DBT) obviated the need for allowing N gap. Nitrogen scheduling as 50% at active tillering + 40% at panicle initiation + 10% at flowering recorded the maximum grain yield (59.05 q ha^?1) and N–?phosphorus (P)–?potassium (K) uptake. The different N fractions in post-harvest soil were in the order of total N> total hydrolyzable N> non-hydrolyzable N> exchangeable ammonium (NH₄⁺)–?N and nitrate (NO₃^?)–?N. Thus, in calcareous soil, rice may be transplanted immediately after burying the dhaincha without any time gap along with 80 kg N ha^?1. Also, application of nitrogenous fertilizer in three splits, delaying N application until active tillering stage, is beneficial for improving rice productivity.  相似文献   

Impact of harvesting time on field carry over infestation of <Emphasis Type="Italic">Sitophilus oryzae</Emphasis> (L.) (Coleoptera: Curculionidae) in different maize genotypes     

P. Lakshmi Soujanya  J. C. Sekhar  Chikkappa G. Karjagi  V. Vidhyadhari  S. B. Suby  N. Sunil  D. Sreelatha  DharamPaul Chaudhary 《Phytoparasitica》2017,45(4):485-499

Study was carried out to evaluate the effect of time of harvest on field carry over infestation of rice weevil Sitophilus oryzae L. in maize. The maize ears were harvested at three different stages namely early harvest- i.e. just before physiological maturity (stage 1), timely harvest i.e. at physiological maturity (stage 2) and late harvest i.e. around ten days after physiological maturity (stage 3). The harvested maize ears were dried, shelled and stored separately over a period of 150 days. The emergence of F₁ progeny of S. oryzae were significantly higher in late harvest maize (37.51) while relatively lower number in timely (27.09) harvest and lowest number in early harvest maize (14.47) were observed. The interaction effects between different stages of harvest × genotype, genotype × storage duration, different stages of harvest × storage duration, different stages of harvest × storage duration × genotype on F₁ progeny emergence were found significant. Similarly, maize ears harvested at early and timely period, showed significantly lower weight losses as compared to late harvest maize. The mean per cent weight loss recorded at 90 and 150 days after storage were 0.66 and 2.24; 1.21 and 5.19; 2.24 and 6.33 in early, timely and delayed harvest maize kernels, respectively. The F₁ progeny emergence was significantly and positively correlated with stage of harvest (r=0.4435). Also significant and positive correlations were found between weight loss and storage duration (r=0.3280). The kernel hardness was found significant negative correlation with progeny emergence and weight loss. The results indicated that physical and biochemical traits are also responsible for varying levels of resistance to S. oryzae. Use of cultural practices such as timely harvest of maize is one of the most promising approaches for efficient in minimization of field carry- over infestation of S. oryzae.  相似文献   

Periodicity of different phenophases in selected trees from Himalayan Terai of India     

Omesh Bajpai  Jitendra Pandey  L. B. Chaudhary 《Agroforestry Systems》2017,91(2):363-374

The temporal phenology of leaf bud bursting, leaf initiation, leaf maturation, leaf fall, flower initiation, fruit initiation and fruit fall was recorded for eight tree species (Ficus hispida, F. squamosa, Mallotus nudiflorus, M. philippensis, Shorea robusta, Schleichera oleosa, Pongamia pinnata and Terminalia arjuna) in the tropical moist deciduous forest of Himalayan Terai region from November 2009 to October 2012. The study revealed that a short low temperature dry period, sufficient winter rain and temperature rise are the triggering factors for summer leaf flushing and, the increased soil water availability for second leaf flushing in rains. Initiation of flowering with leaf emergence in the dry period supports higher rate of fruit setting due to maximum availability and activities of pollinators. The dispersal and post dispersal success of fruits increased by their ripening before and/or in the rainy season. In T. arjuna, no correlation has been found between the fruiting and rains. M. nudiflorus and M. philippensis initiate leaves and flowers with the first significant increase in temperature and photoperiod and are thus suggested as the potential tree species for climate change studies in tropics.  相似文献   

Pharmacokinetics following a single intravenous administration and a dosage regimen for sulfadoxine in buffalo calves (Bubalus bubalis)     

A. K. Srivastava  R. K. Chaudhary  M. S. Bal 《Veterinary research communications》1992,16(3):215-219

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Pharmacokinetics of ofloxacin after a single intravenous bolus dose in neonatal calves     

Gaur A  Saini SP  Garg SK  Chaudhary RK  Srivastava AK 《Journal of veterinary pharmacology and therapeutics》2004,27(2):115-117

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Utilization of waste blood from slaughter houses in poultry feed     

D S Chaudhary  M L Chaturvedi 《The Indian veterinary journal》1966,43(3):247-249

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Molecular distinction and population structure of Indian mustard [Brassica juncea (L.) Czern.]     

Yadav  Prashant  Yadav  Sushma  Mishra  Anurag  Chaudhary  Rajat  Kumar  Arun  Meena  Hari Singh  Rai  Pramod Kumar 《Genetic Resources and Crop Evolution》2022,69(5):1855-1866

Genetic Resources and Crop Evolution - Rapeseed-mustard is one of the most important oilseed crops and providing a major source of edible oil in the world besides having other economic importance...  相似文献   

Influence of winter and spring wheat genetic backgrounds on haploid induction parameters and trait correlations in the wheat × maize system     

Shivali Sharma  G. S. Sethi  H. K. Chaudhary 《Euphytica》2005,144(1-2):199-205

The interactive influence of winter and/or spring wheat genetic background on haploid induction parameters and trait correlation was studied by hybridizing five elite and diverse genotypes each of winter and spring wheat and their F₁s (winter × winter, spring × spring, and winter × spring, generated in a diallel design excluding reciprocals) with a single genotype of maize. Data were recorded with respect to per cent seed formation, embryo formation, and regeneration. High genetic variability was present among the wheat genotypes (parents + F₁s) for the three haploid induction parameters. Significant differences were obtained within and between different groups viz., spring wheats, winter wheats, spring × spring wheats, winter × winter wheats, and winter × spring wheats with respect to the three haploid induction parameters based on ANOVA. The winter genotypes (winter parents and winter × winter wheat hybrids) responded better than the spring groups (spring wheat parents, spring × spring and winter × spring wheat hybrids) with respect to embryo formation and winter × spring wheat hybrids yielded significantly the highest numbers of regenerants. Correlation studies amongst the haploid induction parameters indicated that the genes controlling seed formation and haploid plantlet regeneration are negatively correlated when the genetic backgrounds of both ecotypes are combined in winter × spring hybrids. Haploid embryo formation had no association with seed formation and regeneration in all genetic backgrounds, suggesting independent inheritance.  相似文献   

Relative efficiency of different Gramineae genera for haploid induction in triticale and triticale x wheat hybrids through the chromosome elimination technique   总被引：1，自引：0，他引：1  

A. Pratap    G. S. Sethi  H. K. Chaudhary 《Plant Breeding》2005,124(2):147-153

The study was undertaken to evaluate the relative efficiency of different Gramineae genera for haploid induction in triticale (x Triticosecale) and triticale × wheat (Triticum aestivum) hybrids through the chromosome elimination (wheat × maize, Zea mays) system. Eight intergenotypic triticale and 15 triticale x wheat crosses were subjected to hybridization with nine different Gramineae genera viz., Z. mays, Sorghum bicolor, Pennisetum americanum, Setaria italica, Festuca arundinacea, Imperata cylindrica, Cynodon dactylon, Lolium temulentum and Phalaris minor in two separate experiments. This was followed by in vivo auxin treatment of the crossed spikes and subsequent rescue of the haploid embryos to regenerate green haploid plantlets. All the triticale and triticale x wheat crosses resulted in seed set in variable frequencies when hybridized with maize, I. cylindrica, pearl millet and sorghum. Seed set was also obtained with S. italica, F. arundinacea and P. minor in a few crosses in both groups. In general, all the triticale x wheat crosses, except for one in each case, resulted in embryo formation and green haploid plantlet regeneration when hybridizations were carried out with maize and I. cylindrica. However, the latter outperformed the former in embryo formation (25.48% vs. 20.0%) and regeneration (34.17% vs. 15.10%) frequencies, the differences being significant for regeneration frequencies. In the case of triticale hybrids, no significant differences between maize and I. cylindrica were observed for the three parameters of haploid induction. Embryo formation and regeneration were also observed in some of the triticale as well as triticale × wheat F₁ hybrids when hybridized with sorghum and pearl millet.  相似文献