Indian Journal of Crop Science
Year : 2006, Volume : 1, Issue : 1–2
First page : ( 120) Last page : ( 124)
Print ISSN : 0973-4880.

Crossability barriers in mungbean (Vigna radiata L. Wilczek): with its wild relatives

Bharathi A., Selvaraj K. S. Vijay, Veerabadhiran P., Lakshmi B. Subba

Tamil Nadu Agricultural University, Coimbatore-3, India

Abstract

Wide hybridization enables the interspecific gene transfer, which may lead to the additional source of variation for the desirable characters. The present study was carried out to study the crossability relationship of seven cultivars of Vigna radiata (L) with six V. umbellata accessions, five V. aconitifolia accessions V. trilobata, and V. sublobata. It revealed that there was no free crossing in these species, pod set percentage and pods harvested varied with combinations of two parental cultivars of each species for most of the interspecific hybrids. In the present study, successful pod set was observed on 60 crosses out of 65 interspecific crosses with V.radiata as ovule parent, it was observed the crossability was higher in V. radiata X V. umbellata crosses Viz CO 6 X LRB 296 (29.63%), CO 6X LRB 297 (18.64%). Moderate crossability was observed in V. radiata Var. CO 4 X V. trilobata (8.48%) and V. radiata Var. CoGg 917X V. aconitifolia (7.69%) crosses of V. radiata cultivars with V. sublobata and V. aconitifolia showed poor pod set percentage. Few accessions of V. aconitifolia and V.umbellata showed poor pod set when crosses between V. umbellata and V. radiata revealed the least number of pod set (0.005%) with poor filling of seeds which were shriveled. This may be due to embryos abortion and degeneration during embryogenesis.

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Key words

Interspecific hybridization, Vigna species.

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