J Integr Plant Biol. ›› 1997, Vol. 39 ›› Issue (12): -.

• Research Articles •    

Mapping Quantitative Trait Loci for Reproductive Barriers Occurring in Hybrid Between indica and japonica Rice

Liu Yong-sheng, Zhu Li-huang, Sun Jing-san, He Ping, Wang Yu-zhong and Shen Li-shuang   

Abstract: Hybridization between Oryza sativa L. ssp. indica and 0. sativa ssp. japonica could produce heterosis but various reproductive barriers existed. The barriers included embryo sac sterility, pollen sterility, anther indehiscence and non-synchronization of male and female gamete development in the same spikelet. A molecular linkage map comprising 137 markers was constructed based on 127 doubled haploid (DH) progenies from anther culture of Fl hybrid between an indica rice variety "Zhaiyeqing 8" and a japonica rice variety "Jingxi 17". The linkage map was employed to locate quantitative trait loci (QTL) for reproductive barriers in DH population and its derived two backcross populations by interval mapping. Ten QTLs were detected and located on chromosomes 1, 3,4,5,6,7,8,and 12 respectively. The positions of two QTLs located on chromosomes 3 and 12 were identical to the positions for distorted segregation detected in Fa population from the same cross. All the QTIs had additive effects in increasing sterility except for stj-6 that increased fertility.

Key words: Oryza sativa, indica/japonica, Reproductive barrier, Sterility, Gene mapping

Editorial Office, Journal of Integrative Plant Biology, Institute of Botany, CAS
No. 20 Nanxincun, Xiangshan, Beijing 100093, China
Tel: +86 10 6283 6133 Fax: +86 10 8259 2636 E-mail: jipb@ibcas.ac.cn
Copyright © 2021 by the Institute of Botany, the Chinese Academy of Sciences
Online ISSN: 1744-7909 Print ISSN: 1672-9072 CN: 11-5067/Q
备案号:京ICP备16067583号-22