Studies on heterosis and per se performance in early Segregant population of Urdbean (<em>Vigna mungo</em> L. Hepper)

Abstract

The present investigation consisted of six Urdbean cultivars and fifteen crosses developed using half diallel mating design to study the mean performance of genotypes and heterosis among the crosses. The crosses (F2’s) along with the parental genotypes were grown in a randomized block design with three replications at Experimental Farm of the Department of Crop Improvement, CSK HPKV Palampur (H.P.) during Kharif, 2018. The data were recorded for yield and yield contributing traits. Mean performance and standard heterosis is studied over the check variety i.e. Palampur-93. Analysis of variance revealed that there was sufficient variability among the parental lines and cross combinations. Standard heterosis for seed yield per plant ranged from -36.25 per cent (IC-281994 X DU-1) to 34.55 per cent (HPBU-111× KU-553). Significant positive heterosis for seed yield was observed in only one cross HPBU-111× KU-553 (34.55%), whereas seven crosses were statistically at par with the check. Thirteen genotypes were recorded significantly superior to the check for mean value of seed yield per plant. Mean value for this trait ranged from 2.29 g to 3.45 g. On the basis of per se performance for physiological and yield related traits, three crosses viz., HPBU-111 × KU-553, Palampur-93 × IC-281994 and Him Mash × KU-553 were identified as best cross combinations. These crosses can be further evaluated at Multilocations for commercial exploitation.