Electronic Resource
Springer
Theoretical and applied genetics
86 (1993), S. 1038-1042
ISSN:
1432-2242
Keywords:
Oryza sativa
;
Indica-Japonica hybrid
;
Hybrid sterility
;
Female sterility
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract The genetic model for hybrid sterility that an allelic interaction at the S 5 locus induces the abortion of megaspores has been proposed as partial clarification of the wide compatibility in Asian rice cultivars; this model predicts the presence of an egg-killer. The present study was carried out in order to confirm that the proposed S 5 i allele acts as an egg-killer against its counterpart, the S 5 j allele, in the Indica-Japonica hybrid. A conspicuous feature of an egg-killer is the high rate of its transmission into the progeny through the egg. Backcrossing experiments were conducted using the Indica-Japonica hybrid in which the S 5 i and S 5 j alleles were assumed to be involved. Although an egg-killer was easily identified by these backcross experiments, it was not detected in the Indica-Japonica hybrid, which suggests that the proposed genetic mechanism for hybrid sterility in Asian rice should be viewed with caution.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00211059
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