CHARACTER ASSOCIATION STUDIES IN M2 GENERATION OF FIELDPEA (Pisum sativum var. arvense L.)

摘要

An experiment was carried out with an objective to study the association among characters of fieldpea in M2 generation. The parent material, seeds of PUSA212 variety were irradiated with 10kR, 15kR, 20kR, 25kR and 30kR doses of gamma rays at NBRI, Lucknow. Next day after treatment, the seeds along with control were space planted for raising M1 generation. Each M1plant was harvested separately. Desirable ten M1individual plant progenies from each treatment were bulked and laid in RBD for rising M2 generation. Induced mutations delivered fairly good amount of genotypic correlation and phenotypic correlation. Grain yield per plant shown significant positive correlation with number of pods per plant, days to flowering, days to pod setting harvest index, seed protein content and negatively significant correlation with days to maturity as well as plant height at phenotypic level. Path coefficient analysis revealed that most of the characters under study exhibited positive direct effect on grain yield per plant at both genotypic and phenotypic level. However days to pod setting shown negative direct effect on grain yield per plant yield at both genotypic and phenotypic level. Thus pods per plant, harvest index determining grain yield indicating scope for improving fieldpea yield by selection. The mutants with small pods, tall and increased number of pods per plant were isolated in M2generation