Indian Society of Genetics & Plant Breeding

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Genetic diversity analysis in male sterile lines of sunflower by SSR markers

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Sunflower (Helianthus annuus L.) is one of the most
important oilseed crops in the world. The sunflower
hybrids are superior over open-pollinated varieties in
terms of yield, self fertility and resistance to diseases
[1]. The development of first cytoplasmic genic male
sterile (cms) source Helianthus petiolaris (PET-1) [2]
coupled with identification of its fertility restoration
genes [3] led to the exploitation of hybrid vigor and
commercial use of hybrid sunflower. From 1972
onwards, many hybrids have been developed and
released for commercial cultivation, but all of them
invariably possessed the PET-1 cytoplasm [4, 5].
Large-scale cultivation of hybrids having single cms
source enhances the threat of genetic vulnerability
which may be subsided by use of newer sources of
cytoplasmic male-sterility and fertility restoration
genes. The new cms and fertility restoration lines will
also provide cytoplasmic diversity for hybrid sunflower
production. In sunflower, there are more than 72
sources of cytoplasmic genic male sterile (cms)
sources. However due to the poor availability of the
effective restorers, the other cms sources are not
widely used. In the present study, genetic diversity
of 26 cms lines involving various cytoplasmic sources
were studied using 20 SSR markers.
 

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Year: 2011
Volume: 71
Issue: 3
Article DOI: N/A
Print ISSN: 0019-5200
Online ISSN: 0975-6906

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