作物学报2007，Vol.33Issue(2)：183-188,6.
水稻光合作用及相关生理性状的QTL分析
Quantitative Trait Locus for Photosynthesis and Its Related Physiological Traits in Rice (Oryza sativa L.)
摘要
Abstract
In order to explore the genetic basis for photosynthesis and its related physiological traits, sixty-five chromosome segment substitution lines (CSSLs), derived from a cross between an indica cultivar IR24 and a japonica cultivar Asominori of rice (Oryza sativa L.), were utilized for mapping quantitative trait loci (QTL) for photosynthesis and its related physiological traits. Net photosynthesis (Pn), stomatal conductance (Gs), transpiration rate (Tr), intercellular CO2 concentration (Ci), leaf chlorophyll (CHL), and total leaf nitrogen content (TLN) in flag leaves were measured at heading stage. The CSSLs showed transgressive segregation for many of the traits, and significant correlations were observed for most of the traits. In total, ten QTLs were detected on chromosomes 1, 3, 4, 5, 7, 8, and 10 with a range of percentages of variance explained (PVE) from 9.5% to 46.5%. LOD scores of these QTLs ranged from 2.77 to 8.42. A consistent location was mapped for a QTL controlling stomatal conductance (qGs-8) and leaf chlorophyll concentration (Qchl-8) in the vicinity of R727 on chromosome 8 and for a QTL controlling stomatal conductance (qGs-10) and intercellular CO2 concentration (qCi-10) in the vicinity of C1166 on chromosome 10. No other overlapping loci associated with different traits were detected.These results indicated that the genetic mechanism of photosynthesis was complex in rice.关键词
叶绿素/光合作用/水稻/数量性状基因座(QTL)/全氮含量Key words
Chlorophyll/Photosynthesis/Rice (Oryza sativa L.)/Quantitative trait loci (QTLs)/Total leaf nitrogen content (TLN)分类
农业科技引用本文复制引用
胡茂龙,张迎信,孔令娜,杨权海,王春明,翟虎渠,万建民..水稻光合作用及相关生理性状的QTL分析[J].作物学报,2007,33(2):183-188,6.基金项目
This research was supported by the National High Technology Research and Development Program of China(863 Program)(No.2002AA207002 and No.2001AA241024), and the Natural Science Foundation of Jiangsu Province(No.BK2003076). （863 Program）
