Stability Analysis for Yield and its Attributes in Fieldpea (Pisum sativum L.) Under Kashmir Conditions

By : Asma Majid , S. A. Dar , Shabir H. Wani

Page No: 101-105

Abstract
Eleven promising genotypes of fieldpea including two high yielding released varieties viz., Shalimar Pea-1 and Rachna were selected in the present study for their morphological, seed yield and quality traits. The experimental material was evaluated during rabi 2013-14 at three locations across the random environments of Kashmir valley for stability performance. Analysis of variance (ANOVA) revealed presence of significant variations among all genotypes for all the traits. As per Eberhart and Russell’s model the mean squares due to genotype x environment (G×E) interaction was also significant revealing that genotypes did not perform equally over the environments. The mean square due the environments was significant for all the characters revealed the influence of the environments on these traits. Mean squares of linear and non-linear components revealed that environments (linear) were significant for all the traits which further highlighted the fact that differences between the environments existed and they had considerable influence on all the traits. Mean squares due to G×E (linear) were significant for all the traits. Stability analysis revealed that mean square deviation from regression (S2 di ) was non-significant for most of genotypes across 3 random environments and hence prediction of stability for these genotypes was precise and reliable. The linear regression (bi ) was non-significant for SKUA-P-RF-34 and SKUA-P-RF-36 revealing that these cultivars were average in stability. Comparing their performance with the mean, it was observed that these two genotypes viz., SKUA-P-RF-34 and SKUA-P-RF-36 were well adapted to all the environments. These two genotypes needs to be tested at large number of locations across the valley to further analyze the stability in identifying for commercial cultivation.

Authors :
Asma Majid and Shabir H. Wani : Division of Genetics and Plant Breeding, FoA, Wadura, Sopore -193201, SKUAST-K, Jammu and Kashmir, India.
S. A. Dar : DARS, Budgam, SKUAST-K, P.O Rangreth, Srinagar-191132, Jammu and Kashmir, India.