水稻叶绿素含量动态QTL分析

为剖析水稻不同生育时期叶绿素含量的变化动态及遗传机制，以‘Sasanishiki’（粳稻）、‘Habataki’（籼稻）及其杂交衍生的85个回交重组自交系（BILs）群体为材料，对控制水稻叶片叶绿素含量的数量性状基因位点（QTL）变化动态进行了分析。共检测到39个QTL，包括26个非条件QTL和13个条件QTL，分布在除第7和第11号染色体以外的10条染色体上，平均每个时期检测到3．25个非条件QTL。其中生育前期和生育中后期检测到的QTL位点较少，仅为1—3个；在生育中期（盛期）检测到的QTL位点相对较多，一般为4～5个。在生育期的中期和后期均能在第1和2号染色体上检测到控制叶绿素含量的QTL，并且这些QTL位点在1和2号染色体上呈现聚集现象。本研究同时发现了一些新的QTL位点，这些QTL将有助于我们更全面地了解叶绿素在不同发育时期的遗传基础。

Detection and Analysis of Dynamic QTL of Leaf Chlorophyll Content in Rice （Oryza sativa L.）

Dynamic changes of quantitative trait locus （QTL） controlling rice chlorophyll content were analyzed by using 85 backcross recombinant inbred lines （BILs） to explore the dynamic changes and genetic mechanism of rice chlorophyll content at different growth stages. The BILs were derived from a cross between ＇Sasanishiki＇ （Oryza sativa var. japonica） and ＇Habataki＇ （O. sativa var. indica）. 39 QTLs including 26 unconditional and 13 conditional QTLs were detected on 10 chromosomes except the chromosome 7 and chromosome 11. QTLs were less both in early and late growth stages, in which only 1-3 QTLs were identified. Generally, 4-5 QTLs were detected in the mid-growth period. QTL clusters were both detected on the chromosomes 1 and 2 at mid-growth and late growth stages. Some new QTLs were also found in this study. All these QTLs information would help us to understand the genetic basis of chlorophyll at different stages in more detail.