Genetic mapping of pistil, stamen and glume traits associated with mating system in rice

Due to the importance of mating system in plant fertilization ability، and in order to understand the genetic basis of floral traits associated with mating system in rice including pistil، stamen and glume، these traits were analyzed using a F2:3 population drived from a cross between Iranian cultivar Gharib × Khazar. Quantitative trait loci (QTLs) affecting floral features were detected by Composite interval mapping using a linkage map constructed by using 111 SSR markers. Rate of exerted stigma، stigma length، stigma breadth، style length، anther length، lemma length، palea length، lemma thickness، palea thickness، lemma width and palea width were recorded. As many as 38 QTLs were detected to be associated with 11 traits. A total of 10، 5 and 23 QTLs were detected for trait related to pistil، stamen and size and shape of geumele، respectively. The result obtained revealed that QTLs of qSYL-1، qSYL-6 and qSTL-2a were able to explain 25. 99، 30. 67 and 24. 61% of the total variation of style length and stigma length and distinguished as major effect QTLs. Through the identification of these QTLs، plant breeders would be able to gain more and deeper understanding and insights into the genetic basis of the traits associated with the combining ability in rice cultivars.