J Integr Plant Biol. ›› 2009, Vol. 51 ›› Issue (1): 45-51.DOI: 10.1111/j.1744-7909.2008.00793.x

• Cell and Developmental Biology • Previous Articles     Next Articles

Genetic analysis and fine mapping of two genes for grain shape and weight in rice

Longbiao Guo, Lilian Ma, Hua Jiang, Dali Zeng, Jiang Hu, Liwen Wu, Zhenyu Gao, Guangheng Zhang and Qian Qian   

  • Received:2008-06-19 Accepted:2008-08-21 Published:2009-01-01

Abstract: To identify genetic loci controlling grain weight, F2, F3 and BC2F2 derived from a cross between indica rice variety Baodali with large grains and japonica rice variety Zhonghua11 with normal grains were used as mapping populations. Linkage analyses demonstrated that two genes controlling grain weight, designated as GW3 and GW6, were mapped to chromosome 3 and chromosome 6, respectively. Fine mapping delimited GW3 to a 122kb physical distance between two STS markers (WGW16 and WGW19) containing 16 ORFs annotated by TIGR (http://www.tigr.org). GW6 was further mapped between two SSR markers (RM7179 and RM3187). These results are useful for both marker assisted selection (MAS) of grain weight, and for further cloning of GW genes, which will contribute to the dissection of the molecular mechanism underlying grain weight in rice.

Key words: rice, grain size, primary mapping, fine mapping, marker assisted selection (MAS)

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 © 2022 by the Institute of Botany, the Chinese Academy of Sciences
Online ISSN: 1744-7909 Print ISSN: 1672-9072 CN: 11-5067/Q