Indian Society of Genetics & Plant Breeding

Variation in gynogenic potential for haploid induction in Indian shortday onions

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Gynogenic haploid induction was tried in 14 Indian shortday onion varieties. Variation in gynogenic potential was
observed (0.9 to 4.5 per cent) between genotypes. The
highest frequency of gynogenic plants was in Bhima
Shubhra (4.5 %) and the lowest in Bhima Shweta (0.9 %).
Accumulation of mutant alleles likely contributed to the
low gynogenic frequency. Time to embryo sprouting varied
between 40 to 98 days after inoculation. Highest range in
time of sprouting was observed in Bhima Shubhra, from 51
to 98 days. Non-haploid regenerants were also observed
among gynogenic plants and their gynogenic origin was
confirmed by SSR markers. Parents with good gynogenic
potential can be utilized for introgression breeding in onion
where a reduction in the breeding cycle is beneficial.

Keywords: Allium cepa, inbred, ploidy, homozygous, gynogenesis


Year: 2014
Volume: 74
Issue: 4
Article DOI: 10.5958/0975-6906.2014.00883.9
Print ISSN: 0019-5200
Online ISSN: 0975-6906


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