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

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Title A genetic model for the female sterility barrier between Asian and African cultivated rice species
 
Creator Garavito Espejo, AM
Guyot, R
Lozano, J
Gavory, F
Samain, S
Panaud, O
Tohme, Joseph M.
Ghesquière, Alain
Lorieux, Mathias
 
Subject oryza sativa
oryza glaberrima
hybrid sterility
transmission ratio distortion
bateson-dobzhansky-muller incompatibilities
genetics
 
Description CIAT- Outstanding Research Publication Award (ORPA) - 2010
S1 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 S1 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 × O. glaberrima crosses, the female component of the S1 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 S1 was also found. In light of the available data, a model where incompatibilities in epistatic interactions between S1 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 S1. According to our model, the recombination ratio and allelic combinations between these factors would determine the final allelic frequencies observed for a given cross.
 
Date 2010-08-01
2014-09-24T07:58:08Z
2014-09-24T07:58:08Z
 
Type Journal Article
 
Identifier Garavito Espejo, Andrea; Guyot, Romain; Lozano, Jaime; Gavory, Fréderick; Samain, Silvie; Panaud, Oliver; Tohme, Joseph M.; Ghesquiere, Alain; Lorieux, Mathias (2010). A Genetic model for the female sterility barrier between Asian and African cultivated rice species. Genetics 185 (4):1425-1440
1943-2631
https://hdl.handle.net/10568/42524
http://www.genetics.org/cgi/rapidpdf/genetics.110.116772v1
https://doi.org/10.1534/genetics.110.116772
 
Language en
 
Rights Open Access
 
Publisher Oxford University Press (OUP)
 
Source Genetics