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Acta Agron Sin ›› 2008, Vol. 34 ›› Issue (01): 61-66.doi: 10.3724/SP.J.1006.2008.00061

• CROP GENETICS & BREEDING·GERMPLASM RESOURCES·MOLECULAR GENETICS • Previous Articles     Next Articles

QTL Analysis for Chlorophyll Content in Four Grain-Filling Stage in Rice

A JIA La-Tie12,ZENG Long-Jun1,XUE Da-Wei1,HU Jiang1,ZENG Da-Li1,GAO Zhen-Yu1,GUO Long-Biao1,LI Shi-Gui2,QIAN Qian1*
  

  1. 1 State Key Laboratory for Rice Biology/China National Rice Research Institute, Hangzhou 310006, Zhejiang; 2 Rice Research Institute, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China

  • Received:2007-02-06 Revised:1900-01-01 Online:2008-01-12 Published:2008-01-12
  • Contact: QIAN Qian

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Abstract:

A double haploid (DH) population consisting of 120 lines derived from the cross between a japonica parent Chunjiang 06 and an indica parent TN1 was used to detect QTLs for controlling chlorophyll content in four times of grain-filling stage in rice. Seven chlorophyll-content QTLs were detected and distributed on chromosomes 4, 6, and 8. Expression of QTLs for chlorophyll contents in different times varied. The QTLs detected in the third leaf from top mainly expressed in the early times of grain-filling, and the QTLs detected in the Penultimate and flag leaves expressed in the later times. Four chlorophyll-content QTLs were detected in the first and second times, only three and two QTLs detected in the third and fourth times, respectively. Total contribution rates of the QTLs in the four grain-filling times reduced gradually, indicating chlorophyll content was higher in early times of grain-filling, which is just close relative to leave aging. qCHL2, qCHL4-1, qCHL4-2, qCHL8-1, and qCHL8-2 made effects on chlorophyll contents in early and middle stages of grain-filling, qCHL6-1 and qCHL6-2 were detected from flag leaf in third and fourth stages, respectively, indicating the two QTL were just closely relative to the “keeping green” on aging for flag leaves.

Key words:

Rice, DH population, QTLs, Chlorophyll content

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