Stability analysis for yield and its attributing traits in advanced genotypes of pigeonpea [Cajanus cajan (L.) Millsp.]

Abstract

The present investigation was carried out during kharif 2012 at the Agricultural Research Station, Gulbarga and other four locations located in north eastern dry zone (Zone 2) of Karnataka, to know the stability of the nineteen advanced genotypes of pigeonpea. Highly significant differences among genotypes were observed for all the characters except number of pods per plant, number of seeds per pod and seed yield per plant. The variance due to Genotype x Environment found significant for the characters like days to 80% pod maturity and number of seeds per pod. Environment (linear) interaction component was significant for all the traits. The variance due to pooled deviation (non-linear) was highly significant for all the characters except for number of seeds per pod which reflect considerable genetic diversity in the material. Out of 19 genotypes studied two entries viz., GRG-109 and GRG-107 were consistent and high yielding compared to local checks.

​Stability of Advanced Medium Duration Genotypes Across Seasons for Yield in Pigeonpea [Cajanus cajan (L.) Millsp.]

“…Further, higher value of mean squares due to environment (linear) as compared to genotype x environment (linear) displayed that linear response of environments accounted for the most of total variation for the trait under study. Similar findings in this regard were obtained by Kumara et al (2015). As regard to pooled deviation (nonlinear portion of variance), which is unpredictable portion of G  E interaction was highly significant for the trait under study.…”

Genetic variability for plant type and seed yield components among recombinant inbred lines in pigeonpea

“…Low productivity is mainly due to underutilization of the valuable information in terms of genes hidden in the genetic resources of the pigeon pea, sensitivity to biotic and abiotic stresses and lack of plant type that is high yielding and short duration and that fits into the suitable cropping system in a crop season. Yield attributing traits of the pigeon pea are plant height, the number of primary branches per plant, the number of secondary branches per plant, the average number of pods per plant, average number of seeds per plant and seeds size (Niranjana kumara et al, 2016). Plant type characters include plant height, the number of primary branches, the number of secondary branches, days to flowering and days to maturity (Giriraj kumawat et al, 2012).…”