Ross, M.D. and Weir, B.S. (1975) Maintenance of male sterility in plant populations. III. Mixed selfing and random mating. Heredity, 35 (1). pp. 21-29.
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Abstract
Two models of monogenic recessive male sterility are presented, first where the male-steriles are always fully pollinated (full-fitness model) and second where they are only pollinated to the extent that hermaphrodites are crossed (limited-fitness model). Male-steriles in both models may be maintained by overdominance at the sex-control locus or by having greater ovule or seed fertility than hermaphrodites. For both models fitness of male-steriles is frequency dependent under random mating or under mixed selfing and random mating, and for the case when male-steriles are maintained only by increased fertility, expressions are derived for their equilibrium proportions and those of both hermaphrodite genotypes. Also for this latter case, fitness of male-steriles in equilibrium populations equals that of the hermaphrodites. In the full-fitness model the degree of selfing among hermaphrodites has little effect on equilibrium proportions of male-steriles, which may decline slowly, increase slowly, or remain constant with increased selfing. Except under random mating, equilibrium proportions of male-steriles are lower in the limited-fitness model and decline with increased selfing among hermaphrodites. Outcrossing rates for pollen of hermaphrodites are derived.
| Item Type: | Article |
|---|---|
| Additional Information: | SNNigam Collection |
| Author Affiliation: | Grasslands Div., DSIR, Palmerston North, New Zealand. |
| Subjects: | Crop Improvement > Genetics/Genomics Crop Improvement > Plant Breeding |
| Divisions: | General |
| Depositing User: | Mr Balakrishna Garadasu |
| Date Deposited: | 02 Apr 2013 10:12 |
| Last Modified: | 02 Apr 2013 10:12 |
| Official URL: | http://dx.doi.org/10.1038/hdy.1975.64 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/10039 |
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