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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。
In order to analyze the dynamics and genetic mechanism of chlorophyll content in different growth stages of rice, 85 backcross recombinant inbred lines (BILs) derived from ’Sasanishiki’ (japonica), ’Habataki’ (indica) The dynamic changes of quantitative trait loci (QTLs) controlling the chlorophyll content in rice leaves were analyzed. A total of 39 QTLs were detected, including 26 non-conditional QTLs and 13 conditional QTLs, distributed on 10 chromosomes except chromosomes 7 and 11, with an average of 3.25 non-conditional QTLs detected in each period. There were only 1 to 3 QTLs detected in the early and late growing period, while 4 to 5 QTLs were detected in the mid-growing stage. QTLs controlling chlorophyll content were detected on chromosomes 1 and 2 during the middle and late growth stages, and these QTLs showed aggregation on chromosomes 1 and 2. In this study, we also found some new QTLs. These QTLs will help us understand more about the genetic basis of chlorophyll at different developmental stages.