Vigna umbellata hybridization

Urdbean has narrow genetic base due to common ancestry of various superior genotypes, poor plant type and genetic vulnerability to biotic and abiotic stresses. The underutilized related specie, V. umbellata (ricebean), nutritive and resistant to most of the fungal pathogens, is speculated to be potential donor. Therefore, V. mungo and V. umbellata were crossed with a view to introgress alien genes. On inter-specific hybridization, the presence of pre-fertilization barriers and post-fertilization barriers were observed. As, hybrids exhibited reduced germination and sterility.

9p chauchaungayxua4 18-03-2020 13 2   Download

A study was conducted in ricebean [Vigna umbellata (Thunb.) Ohwi and Ohashi] at Department of Organic Agriculture, CSKHPKV, Palampur to assess the extent of heterosis for eleven characters including grain yield per plant. Six lines and two testers were crossed in line × tester mating design to develop 12 F1 hybrids. The analysis of variance revealed considerable genetic differences among the genotypes. The variance due to parents was significant for all the traits except pods per cluster whereas variance due to crosses was significant all the traits under study.

8p kethamoi2 15-12-2019 9 0   Download