Heterosis and combining ability in F1 and F2 of faba bean (Vicia faba L.)

Yamani, Kh.M.M.

doi:10.21608/ajas.2012.267026

Heterosis and combining ability in F1 and F2 of faba bean (Vicia faba L.)

Document Type : Original Article

Author

Kh.M.M. Yamani

Food Legume Research Program, Field Crops Res. Inst., ARC, Giza

10.21608/ajas.2012.267026

Abstract

This investigation was carried out under the screenhouse at New Valley research station during 2009/2010 to 2011/2012 seasons, to determine heterosis and general (GCA) and specific combining ability (SCA) for yield and yield attributes in five–parental diallel crosses. Five faba bean genotypes (Vicia faba L.) were used as parental lines. Highly significant differences among the tested entries were detected for different traits, indicating wide genetic variability for all traits. Several crosses recorded significant positive heterosis percentages relative to mid parent (MP) and better parent (BP) for number of pods/plant, 100-seed weight and seed yield/plant ranged from 6.3 to 42.4%, 2.8 to 23.0%, 3.1 to 12.8%, 3.2 to 6.6%, and 4.2 to 30.4%, 13.2 to 22.6% relative to MP and BP for each character, respectively. The ratios of (GCA/SCA) exceeded the unity for all studied traits indicating that the genetic variation among these traits in the F₁ and F₂ appeared to be additive. The parental genotype, P₄ (1706B/87/2003) was found to be a good combiner for 100-seed weight and seed yield/plant and P₅

Main Subjects