Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2008, Vol. 24 ›› Issue (9): 186-192.

Special Issue: 水稻

• 农艺科学 • Previous Articles     Next Articles

Genetic Dissection of Flag Leave Angle and Main Panicle Yield Trais in Rice

Zhang Keqin, , Dai Weimin, , Fan Yeyang, Shen Bo, Zheng Kangle   

  • Received:2008-03-26 Revised:2008-06-11 Online:2008-09-05 Published:2008-09-05

Abstract: High rice yield was contributed by ideal rice architecture greatly, and flag leave angle was one of the most important components of the ideal rice architecture, which effects rice yield gaining. With the advance of Marker Assisted Selection (MAS), finding and using quantitative trait loci (QTL) conditioning flag leave angle and other yield traits would contribute to high yield gaining drastically. A linkage map consisting of 256 DNA markers were constructed by using a recombinant inbred line (RIL) population derived from the indica-indica rice cross Zhenshan 97B×Milyang 46. QTL conditioning flag leave angle (FLA) and other four grain yield traits were determined at the one-locus level. Seventeen QTL were detected to have significant additive effects for these traits. General contributions to the phenotypic variance were between 3.46%~25.64%. QTL conditioning the all five traits were detected on chromosome 1,of which two were for FLA; each QTL were detected on chromosome 2、3、9、10and 11,respectively; three QTL for FLA、total number of spikelets per panicle (TNSP) and number of filled grain per panicle (NFGP) respectively were detected on chromosome 5; one QTL for NFGP and two QTL for grain weight per panicle (GWP) were detected on chromosome 6.Correlation analysis revealed that flag leave angle increased grain yield by increasing spikelet fertility.

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