Variation in gynogenic potential for haploid induction in Indian shortday onions
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Authors
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Sivalingam Anandhan
Directorate of Onion and Garlic Research, Rajgurunagar, Pune 410 505, Maharashtra
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Ashwini A. Chavan
Directorate of Onion and Garlic Research, Rajgurunagar, Pune 410 505, Maharashtra
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Jai Gopal
Directorate of Onion and Garlic Research, Rajgurunagar, Pune 410 505, Maharashtra
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Sanjay R. Mote
Directorate of Onion and Garlic Research, Rajgurunagar, Pune 410 505, Maharashtra
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Poonam V. Shelke
Directorate of Onion and Garlic Research, Rajgurunagar, Pune 410 505, Maharashtra
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Kisan E. Lawande
Directorate of Onion and Garlic Research, Rajgurunagar, Pune 410 505, Maharashtra
Abstract
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.