[水稻（Oryza sativa L.）中蒸煮米饭伸长特性的遗传解析]

[Genetic dissection of cooked rice elongation in rice (Oryza sativa L.)].

作者信息

Zhang Guang-Heng, Zeng Da-Li, Guo Long-Biao, Qian Qian, Zhang Guo-Ping, Teng Sheng, Zhu Li-Huang

机构信息

State Key Lab for Rice Biology, CNRRI, Hangzhou, China.

出版信息

Yi Chuan. 2004 Nov;26(6):887-92.

PMID:15762007

Abstract

QTLs for milled rice length (MRL), cooked rice length (CRL) and cooked rice elongation (CRE) were identified by using a population of 127 DH lines derived from a cross between ZYQ8 and JX17. Totally, 14 QTLs for rice elongation traits were detected on chromosomes 1, 2, 3, 5, 6, 7, 10, 11 and 12. Two putative QTLs for MRL were mapped on chromosomes 2. Seven putative QTLs for CRL were mapped on chromosomes 1, 6, 7, 10, 11 and 12. Five putative QTLs for CRE were mapped on chromosomes 5, 6, and 10. The regions of G249-G164 on chromosome 3, G30-RZ516 on chromosome 6 and G1082-GA223 on chromosome 10 were detected simultaneously for affecting cooked rice length and cooke rice elongation. LODs of the QTLs related to rice elongation varied from 2.26 to 9.25, and their explained variations from 5.31% to 17.21% . It is indicated that cooked rice elongation was controlled by polygene and Wx-gene located on the same region with qCRE-6 was important to cooked rice elongation.

摘要

利用由ZYQ8和JX17杂交衍生的127个双单倍体（DH）株系群体，鉴定了糙米长度（MRL）、熟米长度（CRL）和熟米伸长率（CRE）的数量性状基因座（QTL）。总共在第1、2、3、5、6、7、10、11和12号染色体上检测到14个控制水稻伸长性状的QTL。两个推测的控制MRL的QTL定位在第2号染色体上。七个推测的控制CRL的QTL定位在第1、6、7、10、11和12号染色体上。五个推测的控制CRE的QTL定位在第5、6和10号染色体上。同时检测到第3号染色体上的G249 - G164区域、第6号染色体上的G30 - RZ516区域和第10号染色体上的G1082 - GA223区域影响熟米长度和熟米伸长率。与水稻伸长相关的QTL的LOD值在2.26至9.25之间，其解释的变异率在5.31%至17.21%之间。结果表明，熟米伸长受多基因控制，位于与qCRE - 6相同区域的Wx基因对熟米伸长很重要。