Indian Society of Genetics & Plant Breeding

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CYTOGENETICAL AND BIOCHEMICAL ANALYSIS OF INTERSPECIFIC HYBRIDS BETWEE1'l VIGNA RADIATA AND V. UMBELLATA

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Interspecific hybrids were raised between V. radiata and V. umbellata. Both the
species exhibit genotypic differences for crossability which can be exploited to have
more number of vigorous hybrid seeds. The crossability percentage varied between
3.8 to t5.2 among different genotypes. The application of 4 ppm NAA was observed
to enhance the foliage and pod set percentage. The hybrids were identified at the
early stage by their mode of germination and twiny habit. Cytologically, the hybrids
include an array of meiotic abnormalities ranging from non-pairing of chromosomes
through the presence of univalents, chain and ring multivalents and laggards at
anaphase-t. The codominant expression of species specific isoperoxidase at two
development stages also characterized the interspecific hybrids.
 

Keywords: V. radiata, V. umbellata, interspecific hybrid, isoperoxidase, meiotic behaviour

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Year: 1998
Volume: 58
Issue: 1
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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