Skip Navigation

Molecular Plant 2008 1(5):830-838; doi:10.1093/mp/ssn045
This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Add to My Personal Archive
Right arrow Download to citation manager
Right arrowRequest Permissions
Google Scholar
Right arrow Articles by Luo, J.-J.
Right arrow Articles by Lin, H.-X.
Right arrow Search for Related Content
Social Bookmarking
Add to CiteULike   Add to Connotea   Add to Del.icio.us  
What's this?

© The Author 2008. Published by the Molecular Plant Shanghai Editorial Office in association with Oxford University Press on behalf of CSPP and IPPE, SIBS, CAS.

Fine Mapping of Spr3, a Locus for Spreading Panicle from African Cultivated Rice (Oryza glaberrima Steud.)

Ji-Jing Luo, Wei Hao, Jian Jin, Ji-Ping Gao and Hong-Xuan Lin1

National Key Laboratory of Plant Molecular Genetics, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, The Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, 300 Fenglin Road, Shanghai 200032, China

1 To whom correspondence should be addressed. E-mail hxlin{at}sibs.ac.cn, fax 86-21-54924015, tel. 86-21-54924129.

A CSSL (chromosome segment substitution line), SG-64, carrying a segment of chromosome 4 from African cultivated rice (CG-14) in the genetic background of var. Wuyujing-7 (japonica), showed a spreading panicle, which was different significantly from that of Wuyujing-7 with an erect compact panicle. The gene controlling a spreading panicle is referred to as Spr3, and is mapped on chromosome 4. To uncover the genetic basis of Spr3, a large F2 population derived from cross between SG-64 and Wuyujing-7 was constructed for fine mapping of the Spr3 locus. The high-resolution linkage analysis revealed that the Spr3 locus was narrowed down to a 4.6-kb region. The delimited genomic DNA regions of Wuyujing-7 and CG-14 were sequenced and compared. Sequence mutations between Wuyujing-7 and CG-14 were evident and the candidate genes for the locus were predicted. Publicly available databases were searched for homologous cDNA sequences. However, any coding regions or other meaningful sequences for the Spr3 locus were not found within this delimited region. This result suggested that Spr3 is an unknown genetic factor in controlling the outspreading of the primary branches in rice inflorescence. In addition, NIL(Spr3) exhibited seed shattering. The formation of spreading panicle was accompanied by a few undesirable traits and the spreading panicle links with seed shattering suggest that the spreading panicle was likely lost during the domestication and selection for high seed productivity of cultivated rice.

Key Words: rice • spreading panicle • fine mapping • molecular marker


Add to CiteULike CiteULike   Add to Connotea Connotea   Add to Del.icio.us Del.icio.us    What's this?




Disclaimer: Please note that abstracts for content published before 1996 were created through digital scanning and may therefore not exactly replicate the text of the original print issues. All efforts have been made to ensure accuracy, but the Publisher will not be held responsible for any remaining inaccuracies. If you require any further clarification, please contact our Customer Services Department.