A field experiment was conducted to study the extent of heterosis in fifty five genotypes of fieldpea including ten parents and their forty five F 1 's developed through half diallel mating design. Based on overall study of forty five hybrids for heterobeltiosis and economic heterosis the cross HUDP 954 x LFP 477 followed by HFP-4 x IPFD 10-13 and IPFD-1-10 x LFP 477 were found best heterotic combinations for yield and its contributing traits viz., number of pods per plant, number of seeds per pod, number of primary branches, test weight and harvest index in fieldpea. These crosses could be exploited for isolating useful transgressive segregants in fieldpea.
Phenotypic stability was carried out by using Eberhart & Russell model, as well as recent GGE biplot approach for identification of the foremost genotypes across the different environments in pigeonpea [ Cajanus cajan (L.) Millsp.] genotypes. Further, Pearson correlation was carried out to correlate the different yield contributing attributes with seed yield. Fifty six pigeonpea genotypes comprising fourteen parents, forty hybrids and two standard checks were evaluated at four environments during kharif season of 2013 and 2014, to study genotype × environment interaction for yield and related traits. A significant difference was obtained for yield and yield contributing characters among genotypes in individual as well as pooled environments except for pod length, 100 seed weight and seed protein content (%). For traits like days to maturity, plant height, pods per plant, pod clusters per plant, seeds per pod, 100 seed weight and seed yield per plant Genotypes × Environments (linear) values were significant when tested against pooled deviation. Some hybrids such as GT 610 A × GT R 84
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