Identification of a locus for asynchronous heading in rice, <Emphasis Type="Italic">Oryza sativa</Emphasis> L. |
| |
Authors: | Email author" target="_blank">Ken?IshimaruEmail author Takayuki?Kashiwagi |
| |
Institution: | (1) National Institute of Agrobiological Sciences, Kannondai 2-1-2, Tsukuba, Ibaraki 305-8602, Japan |
| |
Abstract: | We have identified a locus for asynchronous heading in rice. The length of heading period in a plant was measured as the indicator of asynchronous heading in 98 backcross inbred lines (BILs). These lines were derived using a single-seed descent method from a backcross of (japonica Nipponbare/indica Kasalath)/Nipponbare, and we used this mapping population in quantitative trait locus (QTL) analysis. We located a single QTL related to asynchronous heading (qah7) in the region of R2401–C39 on chromosome 7, and its contribution to the total variation was 0.14 (r2), with the positive effect due to the Kasalath allele. A near isogenic line (NILah7) that carries a Kasalath chromosomal segment corresponding to qah7 in the Nipponbare genetic background was selected and analyzed to identify a locus for asynchronous heading. The length of heading period in NILah7 was significantly longer (P < 0.001) than that in Nipponbare. |
| |
Keywords: | cool-weather damage flowering heading QTL |
本文献已被 SpringerLink 等数据库收录! |