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Dr. Rajendra Prasad Central Agricultural University, Pusa
In the imperial Gazetteer of India 1878, Pusa was recorded as a government estate of about 1350 acres in Darbhanba. It was acquired by East India Company for running a stud farm to supply better breed of horses mainly for the army. Frequent incidence of glanders disease (swelling of glands), mostly affecting the valuable imported bloodstock made the civil veterinary department to shift the entire stock out of Pusa. A British tobacco concern Beg Sutherland & co. got the estate on lease but it also left in 1897 abandoning the government estate of Pusa.
Lord Mayo, The Viceroy and Governor General, had been repeatedly trying to get through his proposal for setting up a directorate general of Agriculture that would take care of the soil and its productivity, formulate newer techniques of cultivation, improve the quality of seeds and livestock and also arrange for imparting agricultural education. The government of India had invited a British expert. Dr. J. A. Voelcker who had submitted as report on the development of Indian agriculture. As a follow-up action, three experts in different fields were appointed for the first time during 1885 to 1895 namely, agricultural chemist (Dr. J. W. Leafer), cryptogamic botanist (Dr. R. A. Butler) and entomologist (Dr. H. Maxwell Lefroy) with headquarters at Dehradun (U.P.) in the forest Research Institute complex.
Surprisingly, until now Pusa, which was destined to become the centre of agricultural revolution in the country, was lying as before an abandoned government estate. In 1898. Lord Curzon took over as the viceroy. A widely traveled person and an administrator, he salvaged out the earlier proposal and got London’s approval for the appointment of the inspector General of Agriculture to which the first incumbent Mr. J. Mollison (Dy. Director of Agriculture, Bombay) joined in 1901 with headquarters at Nagpur
The then government of Bengal had mooted in 1902 a proposal to the centre for setting up a model cattle farm for improving the dilapidated condition of the livestock at Pusa estate where plenty of land, water and feed would be available, and with Mr. Mollison’s support this was accepted in principle. Around Pusa, there were many British planters and also an indigo research centre Dalsing Sarai (near Pusa). Mr. Mollison’s visits to this mini British kingdom and his strong recommendations. In favour of Pusa as the most ideal place for the Bengal government project obviously caught the attention for the viceroy.
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ThesisItem Open Access Stability analysis and molecular profiling of drought tolerant rice (Oryza sativa L.)(DRPCAU, Pusa, 2020) Kumari, Shyama; Mishra, S.B.Thirty four genotypes of rice were evaluated for various morpho-physiological characters and to investigate the microsatellite markers based polymorphism for their profiling and differentiation using polymorphic and informative markers in order to estimate the extent of genetic diversity among these rice genotypes. Experimental materials were evaluated in randomized block design with three replications during Kharif 2017-18 & 2018-19. Molecular characterization was done by targeted amplification of the genomic DNA using a panel of fifteen microsatellite primer pairs. Statistical methods and parameters used for deriving inference were analysis of variance, range, mean values, relative mean performance, variability parameters, correlation and path coefficients. An analysis of variance revealed significant differences among the genotypes for all the characters evaluated during present study. Considerable extent of variability existed for all the attributes recorded among the genotypes. Analyses of variance revealed that 34 genotypes of rice (Oryza sativa L.) varied significantly for 21 mopho-physiological traits showing sufficient variability among themselves for all environments. Wider range was recorded for number of grains per panicle followed by straw yield per plant, grain yield per plant, fresh root weight, while minimum range was observed for the traits root volume, canopy temperature, panicle number per plant and leaf drying indicates the presence of variability among the genotypes. The phenotypic coefficient of variation (PCV), higher than genotypic coefficient of variation (GCV) for most of the characters in different proportion indicated influence of environment for expressions of traits. High heritability (broad sense) coupled with high genetic advance (as percent of mean) for FRW, DRW, LR and LD indicated the preponderance of additive effects of gene. GYP-1 and SYP-1 had shown moderate heritability coupled with moderate to high genetic advance indicated that presence of additive and non-additive gene action while rest of the traits has shown low heritability coupled with low genetic advance indicated the expression of the traits are being influenced by the environments. Number of grains per panicle, straw yield per plant and harvest index exhibited positive and significant correlation with grain yield comprising their positive and high direct effect on grain yield suggesting that these traits may be considered as a prime trait during the course of selection for the improvement of yield under drought stress condition; while leaf rolling and leaf drying exhibited negative and significant correlation with grain yield comprising their negative high direct effect suggesting that the genotype/genotypes having high score may not be encouraged for selection under drought stress condition. Based on multivariate analysis, maximum inter cluster distances were observed between cluster III and cluster IX. The genotypes viz., IR 91648-B-89-B-81-B, IR 95781-15-1-1-4 and IR 95122:13-B-7-4-7-3 were present in cluster III as well as the genotype present in cluster IX (GSR IR1-DQ139-R1-L2) so these genotypes may be intermated to develop heterotic recombinants for enhancing the number of tillers per plant, panicle number per plant, number of grains per panicle, 1000 grain weight, grain yield per plant and straw yield per plant, root length, root volume, fresh root weight, dry root weight as well as to reduce the score of leaf rolling and leaf drying to develop the drought tolerant genotypes while to reduce the canopy temperature and to enhance the chlorophyll content as well as spikelet fertility genotype IR 96279-33-3-1-2 may be used in crossing programme. Pooled analysis of variance for different studied characters between the genotypes exhibited significant variation for most of the characters indicated the presence of genotypic variation in the studied rice genotypes. Significant environmental variation was observed for all the characters indicated environmental conditions were fluctuating in nature. The linear components of G x E interaction was found highly significant for most of morpho-physiological characters indicating that these characters were unstable and fluctuated in their expression with change in environment. Total eight stable genotypes out of 34 genotypes noticed for yield stability in poor/rich environments. In poor environment 4 genotypes viz. IR 83140-B-11-B, IR 95795-53-1-1-2, IR 95793-5-2-2-3 and IR 93849-22-3-1-1 had shown stability suggesting that these genotypes may be utilized for cultivation under drought stress condition with poor management whereas in rich environments IR 95785-31-2-1-2, GSR IR1-DQ62-D6-D1, IR 95785-15-2-1-2 and IR 93856-10-2-3-2 were found stable for grain yield indicating that these genotypes may show promise under drought stress condition with good management. One genotype IR 89889-34-2-1-1 exhibited average stability for panicle number per plant suggesting that this genotype may be used to have the optimum number of panicles per unit area for poor/rich environment under drought stress condition. It revealed from dendrogram that germplasm Rajendra Nilam falling with varieties Sahbhagi Dhan and Rajendra Bhagwati together there is possibility of existing many traits to be similar whereas, the genotypes Abhishek, IR95817-14-1 and GSRIRI-DQ12 falling extremely apart from whole of the cluster shows the possibility of discovering new traits in them which could be further assisted in breeding programme.ThesisItem Open Access Generation mean analysis in relation to Zinc biofortification in Rice (Oryza sativa L.)(DRPCAU, Pusa, 2020) KUMAR, ASHUTOSH; Singh, N.K.The present investigation was conducted at Rice Research Centre, Pusa farm of Department of PBG, RPCAU, Pusa, Samastipur with a view to study the gene action for differential micronutrient accumulation in rice using RBD design with three replications. The analysis of variance revealed significant differences among all generations of four crosses for all the traits. This indicates that there is ample scope for selection of promising lines from the present gene pool for yield along with grain Fe and Zn content. As compared to MTU1010, TEVIRII was the better performer for panicle length, grain Fe content and grain Zn content while MTU1010 was superior to TEVIRII for rest of the traits in cross-I (TEVIRII × MTU1010). In cross-II (R-RIZIH-7 × MTU 1010), R-RIZIH-7 was superior to MTU 1010 for plant height, effective tillers per plant, panicle length, canopy temperature, grain iron content and grain zinc content while, for other traits, MTU 1010 was found superior to R-RIZIH-7. In cross-III (HATI BANDHA × TEINEM RUISHENG MAA), HATI BANDHA was found superior for the traits days to fifty percent flowering, days to maturity, plant height, effective tillers per plant, panicle length, flag leaf area, grains per panicle, canopy temperature, chlorophyll content, grain iron content, grain zinc content and grain yield per plant while for other traits, TEINEM RUISHENG MAA was found superior over HATI BANDHA. In cross-IV (KHUSISOI-RI-SAREKU × IR91175-27-1-3-1-3), KHUSISOI-RI-SAREKU was found superior for the traits effective tillers per plant, panicle length, flag leaf area, grains per panicle, canopy temperature, chlorophyll content, harvest index, grain iron content, grain zinc content and grain yield per plant while for other traits, IR91175-27-1-3-1-3 was found superior over KHUSISOI-RI-SAREKU. F1 average performance was found superior to both the parents for grain Fe and grain Zn content in all the crosses except cross-II. For other traits viz., effective tillers per plant, panicle length, grains per panicle, chlorophyll content, flag leaf area and harvest index also F1 average performance was found superior to both parents in all crosses. Scaling test revealed all the traits related to yield along with grain Fe and Zn content were significant in either one of the scales or in combination representing the existence of epistatic interaction between the genes involved for these traits in all four crosses, except for the traits days to maturity and chlorophyll content in cross-I and for canopy temperature in cross-II. For days to maturity and chlorophyll content in cross-I and for canopy temperature in cross-II, none of the scale (A, B, C, D) was found significant. This indicated adequacy of simple additive-dominance model for these traits. Further, Joints Scaling test was adapted to fit the data to three parameter model to estimate mean (m), additive gene effects (d) and dominant gene effects (h) and to evaluate adequacy of simple additive-dominance model. χ2 - test was conducted to evaluate the goodness of fit of this model. For all the traits studied except days to maturity and chlorophyll content in cross-I and for canopy temperature in cross-II, χ2 values were found significant indicating the presence of digenic non-allelic interaction for all these traits, indicating the data does not fit into simple additive-dominance model. The role of epistatic interactions was identified by lack of goodness of fit into three parameter model and the data was further subjected to six parameter model. Digenic non-allelic interaction model with six parameters namely m, d, h, i, j and l revealed that the epistatic interaction model was found adequate to explain the gene action for most of the traits. Gene effects were found to be cross specific and both additive and non-additive gene action were important for expression of almost all characters studied; therefore, biparental mating followed by selection of superior recombinants from segregating population is desirable for improvement of rice micronutrient content along with high yield per plant. Predominance of duplicate type of gene action as evident from opposite sign of [h] and [l] was noticed for the expression of grain Fe content in cross-I and IV and for grain Zn content in cross-IV. The same sign of [h] and [l] indicated the involvement of complementary type of gene interaction in expression of grain Fe content in cross-II and III and for grain Zn content in cross-I. Complementary type of epistasis tends to enhance the heterotic effect as the magnitude of [l] adds to the main effect [h] as opposed to the case in duplicate type of epistasis. Cross-I, III and IV showed significant and positive heterosis over both the mid parent and the better parent for grain Fe and grain Zn content. For grain yield per plant, cross-II, III and IV showed significant and positive heterosis over both the mid parent and better parent. Cross-I and cross-III was found superior in performance for yield and yield attributing traits along with grain Fe and Zn content among all four crosses. In all four crosses high broad sense heritability coupled with high genetic advance over mean was recorded for grain Fe content and yield per plant, while for grain Zn content high broad sense heritability coupled with moderate genetic advance was recorded, which indicated that the most likely the heritability is due to additive gene effect and selection may be effective mostly in early segregating generation. High broad sense heritability but poor narrow sense heritability for most of the traits studied might be due to presence of non-additive and non-allelic interaction and sampling error for these traits. Correlation studies revealed, grain Zn content had positive and significant association with grain Fe content in cross-I and IV and the grain yield per plant exhibited significant and negative correlation with grain Zn content and grain Fe content in cross-IV. No direct positive or negative effect of grain Fe and Zn content on yield was found. Considering the overall results from the present study, it is apparent that both additive as well as non-additive genetic effects has significant role in expression of most of the traits studied. The type and magnitude of gene effects differed for different traits in the same cross and for the same traits in all crosses, which necessitates specific handling of crosses in segregating generations. Under this situation biparental mating, recurrent selection and diallel selective mating system might be profitable that take care of both additive and non-additive gene action. For the traits governed by additive gene action, pedigree method of selection will be most effective .While, for traits which are governed by additive and non-additive gene effects or non-additive gene effects alone in different crosses, heterosis breeding and recombination breeding with postponement of selection at later generation will be rewarding.ThesisItem Open Access Molecular characterization and stability study in Indian mustard (Brassica juncea L.) genotypes under early and terminal heat stress(DRPCAU, Pusa, 2019) YADAV, SUMAN; PANDEY, ANILPresent study entitled “Molecular characterization and stability study in Indian mustard (Brassica juncea L.) genotypes under early and terminal heat stress” conducted under early-timely—late-sown environments during Rabi 2017-18 and 2018-19 at research farm of TCA Dholi. The twenty genotypes belonging to various geographic locations and diverse pedigree reflected their genetic worth for thirty five morpho-physio-biochemical traits exhibiting sufficient variability. PCV higher than GCV revealed varying environmental influence. High h2 bs and GAM for LMSI, TSS, PA & PC in early and terminal stress conditions showed preponderance of additive gene action. Positive and significant association of VPD, DFFO, D50%F & DPM while, negative with PAPD expressed their phonological inter-relationship and more usefulness of VPD & PAPD for terminal heat stress condition. SYP positively with HI, EL, CC & PH (and also between EL & CC); while, negative with H.T.E. (early & terminal heat stress); OC, SPB & PC (early-sown) whereas, SI & H.S.I. (late-sown). SI & H.S.I. decrease with increased H.T.E. and subsequently, increased SYP can be utilized. HI with high positive direct effect and association was major yield predictor (early & late-sown) alongwith BYP (early) and EL, RWC & CC (terminal) heat stresses. On Tocher‘s, Canonical (vector) and K-mean clustering, Rajendra Sufalam and Urvashi (oligo-genotypic) alongwith RAURD-14-18, BPR-541-4, DRMR4001, DRMR-15-9, RGN-368, RGN-13, PRE-2013-19 and KMR (E)16-1 were divergent genotypes and also reflected desirable per se for various morpho-physio-biochemical traits. Nine crosses between divergent parents suggested 5 crosses involving DRMR-15-9, RAURD-14-18, BPR-541- 4, DRMR4001 & RGN-368 with Urvashi; and 4 crosses involving RGN-13, RGN-368, PRE-2013-19 & KMR (E) 16-1 with Rajendra Sufalam. PA & H.T.E. contributed maximum towards total divergence under both stress environments. Molecular diversity analyses also reflected PRE-2013-19, KMR (E)16-1 & RAURD-14-18 as divergent as well as genotypes with unique alleles; whereas, DRMR-15-9, Rajendra Sufalam and RGN-368 as genotypes with unique alleles. Thus, reflecting their overall usefulness as divergent genotypes. NI2A09, showed best polymorphic bands, highest (0.636) PIC values and four alleles per locus and can be effectively utilized for studying diversity of Indian mustard genotypes. Studied genotypes reflected variability in all six environments except for CT & RGR. Rajendra Sufalam offered stability under poor environment and found most suitable genotype for terminal heat stress-late-sown & timely-sown conditions. Also it was only stable stable (rich environment) genotype for oil content overall six environments as well as diverse stable parent with superior per se for many traits including SYP. RGN-13 with average and rich environment stability in early-timely and late-timely-sown conditions whereas, RAURD-14-11 and BPR-541-4 (rich environment stability) suitable for farmers for both early and late-sown with timely-sown agroecologies of Bihar. Suggested Indian mustard plant type for heat stress condition, the emphasis is required towards seedlings and early growth stages before flowering (SDW-VPD-DFFO), PAPD, DPM, high: LPMA, PBP, SPMA, SPB, SL, TSW, RWC & CC including SI, H.S.I. and H.T.E.ThesisItem Open Access Genetic analysis in relation to Iron and Zinc accumulation in rice(DRPCAU, Pusa, 2020) Kumar, Avinash; Singh, N.K.The present investigation was carried out with 63 genotypes received under Harvest Plus Rice Project for the evaluation of extent of grain iron and grain zinc content by AAS method. Based on the data obtained 4 genotypes for high iron and 1 with low while, 4 genotypes for high zinc and 1 with low were selected. A total of 10 parents were identified. The identified parents were crossed in half diallel fashion during Kharif, 2017 to generate 45 F1 crosses. During off season (January, 2018), 2 crosses P1×P3 and P3×P5 (IR68144-2B-2-2-3-1 × TEVIRII and TEVIRII × KHUSISOI-RI-SAREKU) among 45 were taken to NRRI, Cuttack for generation advancement and for generation of backcross population. During Kharif, 2018 the identified promising parents, their 45 F1’s and 2 standard checks (Rajendra Nilam and Rajendra Mahsuri-1) were planted in Randomized Block Design with 3 replications at Rice research farm, Pusa, Samastipur, Bihar with the objective to study the genetic diversity among parents, to estimate the extent of heterosis in F1’s over check i. e. economic heterosis, to study the relationship between parental diversity and heterosis, general and specific combining ability of parents and crosses respectively, to study the nature and magnitude of gene action and to identify the promising crosses for yield, yield attributing traits, high grain Iron and grain Zinc content. For generation mean analysis of 2 crosses viz. IR68144-2B-2-2-3-1 × TEVIRII and TEVIRII × KHUSISOI-RI-SAREKU, six generations (P1, P2, F1, F2, B1 and B2) were planted separately with 3 replications to study the nature and magnitude of gene action. Based on cluster analysis, parents were grouped into 3 clusters. Cluster I and II comprised of 4 and 5 genotypes respectively, while Cluster III was monogenotypic. Cluster II have maximum mean values for 4 traits including grain iron and grain zinc content. Cluster I have minimum mean value for grain iron while, cluster III have minimum mean value for grain zinc. Cluster III showed minimum mean values for earliness and dwarfness while, maximum mean values for 4 traits including grain yield per plant. Cluster II and cluster III showed maximum divergence for grain yield. Analysis of variance for different traits revealed that ample amount of genetic variability exists for these traits among genotypes.ThesisItem Open Access Stability study in spring planted early maturing sugarcane clones for higher yield(Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur (Bihar), 2018) Kumar, Praveen; Pandey, S.S.Fifteen early maturing sugarcane genotypes were planted in spring season at two different locations viz. Pusa and Madhopur for two consecutive years (2016 and 2017) to assess their stability across four environments viz. E1 – Pusa‟2016, E2 – Madhopur‟2016, E3 – Pusa‟2017 and E4 – Madhopur‟2017, in Randomized Block Design with three replications for yield and attributing traits. The genotypes showed high amount of variability present in individual (E1, E2, E3 and E4) and pooled over environments for most of the characters. Genotypes viz. CoP 16437, CoP 16436, CoP 11437 and CoP 16438 showed superiority for most of the traits including sugar and cane yield. PCV was found higher than GCV revealed environmental influence, sugar yield exhibited high heritability coupled with high GAM revealing preponderance of additive effects of gene while cane yield at harvest showed high heritability coupled with moderate GAM. Significant G × E interaction including environment (linear), linear component of G × E interaction and pooled deviation (non-linear) were significant indicating considerable genetic variability for most of the studied traits. Role of the environmental variation was observed for most of the attributes except for the number of shoots at 120 days, plant height (PH) at 240 days, single cane weight (SCW), number of milliable cane (NMC) and cane yield (CY) at harvest revealing no effect of environment or similar behaviour and response of studied genotypes. As per estimated stability parameters, six genotypes were found stable viz. CoP 16437, CoP 11438 and BO 153 stable for CY and SY in rich environment. CoP 16436 stable in poor environment for CY while in rich environment stable for SY. CoP 16438 stable in poor and rich environment for SY and CY respectively whereas CoP 11437 was stable for CY in rich environment. In AMMI analysis, G × E interaction was found highly significant for most of the traits, IPCA I and IPCA II were also found highly significant for most of the traits. IPCA I and IPCA II cummulatively contributed more than 80 percent of the total G × E interaction for all traits. All four environments E1, E2, E3 and E4 were identified as favourable for cane yield and sugar yield at harvest and fall into two groups i.e. one group (E2 and E4) and another group (E1 and E3) were preferred for most of the traits and had similar effects on genotypes. Biplot analysis revealed that genotypes CoP 16437, CoP 16436, CoP 11437, CoP 16438, BO 153 and CoP 11438 were found the most desirable and favourable across different environments. As per both the stability model the genotypes viz. CoP 16437, CoP 16436, CoP 11438, CoP 16438 and CoP 11437 were identified as stable one for yield and yield attributing traits in their respective environments.ThesisItem Open Access Stability study on basal and non-basal branching genotypes of Indian Mustard (Brassica juncea L. Czern & Coss) under different moisture regimes(Dr. Rajendra Prasad Central Agricultural University, Pusa, Samastipur (Bihar), 2018) Chandra, Khusboo; Pandey, AnilKeeping in view large acreage of Indian mustard under conserved residual moisture – rainfed condition on farmers‟ fields, the present study entitled “Stability study on basal and non-basal branching genotypes of Indian mustard (Brassica juncea L. Czern & Coss) under different moisture regimes” was undertaken. Two field experiments: Divergence study under rainfed condition (Rabi 2015-16) with 50 genotypes from 10 AICRP-R&M centres located in major crop Brassicas growing areas; Stability study (Rabi 2016-17) with 20 genotypes, under four environments viz, no irrigation under Rainout Shelter (E1), rainfed (E2 ), one irrigation : 45 DAS (E3 ) and two irrigations: 45 and 65 DAS (E4 ), conducted in Randomized Complete Block Design in three replications and evaluated for twenty – five and thirty – three morpho-physio-biochemical traits, respectively along with laboratory experiment for drought related thirteen physiological traits. 50 genotypes for investigated characters revealed significant amount of variability, categorized as 13 BB and 37 Nbb (27 M-Nbb and 10 H-Nbb) plant types. Rajendra Suphlam and NDRE7 (BB), Pusa Mahak and NRCDR-2 (M-Nbb) and Rohini (H-Nbb) reflected superiority for many traits as compared to best national check basal – branching variety Varuna. High level of variation with more number of PBB, SB-PBB, less IL-PBB, bold seeds – PBB on basal branches observed as compared to Nbb on all 13 BB genotypes. PCV higher than GCV revealed environmental influence, PBP-1, SBP-1, NS, SG, IL, HFPB, HFS, AS, AB, RL, RV and RG exhibited high h2bs and Genetic advance as percent of mean revealing preponderance of additive effects of gene. Early DFF, DPM and less IL showed negative whereas, RV, RG and SS-1 exhibited positive association of traits with GYP1. Multivariate analyses, Tocher‟s, Euclidean and PCA methods reflected maximum contribution (85.39%) of root length, HFPB and RV towards total divergence. The suggested crosses with the most divergent parents involved all branching patterns (BB, M-Nbb and H-Nbb) in 13 crosses combining 9 (Tocher‟s and Euclidean method) and more reliable in six divergent crosses between six most divergent genotypes: Rajendra Suphlam/ Divya, Rajendra Suphlam/ RH0406 and Rajendra Suphlam/ TM-2 (BB/BB); Pusa Mahak/ Divya (M-Nbb/BB); Rajendra Suphlam/ Kranti(BB/M-Nbb) and Pusa Mahak/ Kanti (M-Nbb/H-Nbb) common from Tocher‟s, Euclidean and PCA methods, were suggested for future Brassica improvement. High amount of variability individual (E1, E2, E3, E4) and pooled over environments reflected worth of studied genotypes for most of the characters. Significant G-E interaction including environment (linear), linear component of G-E interaction and pooled deviation (non-linear) were significant indicating considerable genetic variability for most of the studied traits. Role of the environmental variation was observed for most of the attributes except no influence on SD, LS, SS-1, LAI, CC, PRO, TSW and OC. Out of eleven stable genotypes, seven (NRCDR-2, TM-151, Kranti, PKRS-28, TM-128, PM-28 and RAURD-78) in poor, two (Rajendra Suphlam and KMR 10-2) in average and two (Rohini and RH8814) in rich environments. NRCDR-2 and Rajendra Suphlam, both stable genotypes for yield in poor and average environments, respectively, exhibited stability for RGR, LAI,SLW, HI and DME( in poor) and for RV, DPM, CC, PRO and BY (in rich) environments. But for HFPB and TSW, Rajendra Suphlam reflected stability in poor whereas for HFPB, NRCDR-2 expressed in rich environment. For none of the 11 stable genotypes DFFO reflected stability and needs attention for ideotype development except RH-8814 in rich environments. NRCDR-2 (M-Nbb, Variety 2007) is the most stable genotype in poor whereas popular variety Rajendra Suphlam (BB) stable in average environments can be suggested to farmers for residual moisture – rainfed condition. Suggested plant ideotype based on findings of present investigation for moisture stressed – rainfed condition would be basal – branching, semi – compact growth habit (AB) and semi – appressed (less AS) siliqua bearing one; with more than 50% PBBs accommodating SBs, less IL, lower positioning of HFS, deep tap root with more volume (RL and RV), earliness in DFF and DPM, high RGR, LAI and SLW up to early DFFO stage, bold seeds and other yield components like LS, SS-1 and DME. Yield determinants RV, RL and HFPB are most important for residual moisture – rainfed environments as reflected by their contribution towards total divergence, high significantly positive (RL, RV) and negative ( HFPB) association, regression direct effect towards yield along with high h2bs and Genetic advance as percent of mean. Overall, RV as best yield contributor also reflected stability in rich environment among stable genotypes for yield (poor and rich environments) and could be utilized for mustard varietal improvement in moisture stress.ThesisItem Open Access Combining ability analysis and heterosis study involving CGMS lines in Pigeonpea (Cajanus cajan L. Millsp.)(RAU, Pusa (Samastipur), 2013) Prasad, Yogendra; Mishra, S. B.ThesisItem Open Access Identification of heterotic crosses for yield and oil quality traits in Indian mustard (Brassica junceaL. Czern. & Coss).(DRPCAU, Pusa (Samastipur), 2013) Kumar, Binod; Pandey, Anil
