Format

Send to

Choose Destination
See comment in PubMed Commons below
Genetics. 2010 Aug;185(4):1425-40. doi: 10.1534/genetics.110.116772. Epub 2010 May 10.

A genetic model for the female sterility barrier between Asian and African cultivated rice species.

Author information

  • 1Plant Genome and Development Laboratory, Institut de Recherche pour De'veloppement, 34394 Montpellier Cedex 5, France.

Abstract

S(1) is the most important locus acting as a reproductive barrier between Oryza sativa and O. glaberrima. It is a complex locus, with factors that may affect male and female fertility separately. Recently, the component causing the allelic elimination of pollen was fine mapped. However, the position and nature of the component causing female sterility remains unknown. To fine map the factor of the S(1) locus affecting female fertility, we developed a mapping approach based on the evaluation of the degree of female transmission ratio distortion (fTRD) of markers. Through implementing this methodology in four O. sativa x O. glaberrima crosses, the female component of the S(1) locus was mapped into a 27.8-kb (O. sativa) and 50.3-kb (O. glaberrima) region included within the interval bearing the male component of the locus. Moreover, evidence of additional factors interacting with S(1) was also found. In light of the available data, a model where incompatibilities in epistatic interactions between S(1) and the additional factors are the cause of the female sterility barrier between O. sativa and O. glaberrima was developed to explain the female sterility and the TRD mediated by S(1). According to our model, the recombination ratio and allelic combinations between these factors would determine the final allelic frequencies observed for a given cross.

PMID:
20457876
PMCID:
PMC2927767
DOI:
10.1534/genetics.110.116772
[PubMed - indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Support Center