【摘要】 利用高柱头外露率的籼稻窄叶青 8号 (ZYQ8)和极低外露率的粳稻京系 17(JX17)以及由它们构建的加倍单倍体 (DH)群体 ,在海南对各DH株系的柱头外露率进行调查 ,并使用该群体的分子连锁图谱进行数量性状座位(QTL)分析。共检测到 2个控制水稻柱头外露率的QTL(qPES 2 ,qPES 3) ,分别位于第 2、第 3染色体 ;并发现控制柱头单边外露率的QTL与柱头外露率完全一致 ,而控制柱头双边外露率的QTL只在第 2染色体上检测到 ;其增效基因均来源于ZYQ8。同时定位的控制穗粒数的QTL位于第 6染色体和第 8染色体上 ,与柱头外露率之间没有连锁关系。更多还原

【Abstract】 Percentage of exserted stigmas (PES ) was investigated in Hainan by using a population of 127 DH population derived from a cross between a high PES indica variety Zaiyeqing 8(ZYQ 8) and a low PES japonica variety Jingxi 17(JX 17) and its molecular linkage map of 234 markers.Two QTLs ( qPES 2,qPES 3 ) for PES were located on chromosome 2 and 3,respectively.There is no difference between the QTLs for single stigma exsertation and total PES,but the only QTL for dual stigma exsertation located on chromosome 2,whose positive additive effect was from ZYQ 8.Simultaneously the detected QTLs for spikelets per panicle located on chromosome 6,8,respectively and had no linkage relation with the QTLs for PES.更多还原