Stability of male-sterile sources and fertility restoration of their hybrids in pearl millet

Rai, K N and Virk, D S and Harinarayana, G and Rao, A S (1996) Stability of male-sterile sources and fertility restoration of their hybrids in pearl millet. Plant Breeding, 115 (6). pp. 494-500. ISSN 0179-9541

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Abstract

Genetic background has a significant effect on the expression of cytoplasmic-nuclear male sterility (CMS) in pearl millet (Pennisetum glaucum (L.) R. Br.). Therefore, a reliable characterization of CMS sources requires the use of near-isonuclear lines and their hybrids. We used this approach to characterize five CMS sources (A1, A2, A3, Av, and A4). Male sterility of 81A4 was the most stable, followed by 81A1 and 81Av, indicating the relative merits of these CMS sources in breeding stable male-sterile lines. Male-sterile lines 81A2 and 81A3 were highly unstable, indicating their minimal value. Differential male fertility restoration patterns of hybrids made on 81AV and 81A4 suggest that the Av and A4 cytoplasms represent CMS systems that are different from each other and from A1, A2 and A3. An evaluation of topcross hybrids of 15 diverse populations made on 81A1 and 81A4 showed that each population had restorers and maintainers of both cytoplasms and that the frequency of maintainers of A4 was as high as, or higher than, that of the A1 cytoplasm. Thus, use of the A4 cytoplasm can substantially increase the probability of breeding stable male-sterile lines based on inbreds developed from diverse genetic backgrounds, and also provide the opportunity for breeding restorers from each of these diverse genetic sources.

Item Type:	Article
Divisions:	UNSPECIFIED
CRP:	UNSPECIFIED
Uncontrolled Keywords:	Pennisetum glaucum, pearl millet, CMS sources, fertility restoration, male sterility
Subjects:	Mandate crops > Millets
Depositing User:	Mr Sanat Kumar Behera
Date Deposited:	17 Oct 2011 08:09
Last Modified:	17 Oct 2011 08:09
URI:	http://oar.icrisat.org/id/eprint/2681
Official URL:	http://dx.doi.org/10.1111/j.1439-0523.1996.tb00964...
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Author

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