QTLs for Plant Height and Heading Date in Rice Under Two Nitrogen Levels

Q3 Agricultural and Biological Sciences

Acta Agronomica Sinica Pub Date : 2011-09-01 DOI:10.1016/S1875-2780(11)60042-4

Yue FENG, Rong-Rong ZHAI , Li-Yong CAO, Ze-Chuan LIN, Xing-Hua WEI, Shi-Hua CHENG

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引用次数: 7

Abstract

A recombinant inbred line (RIL) population derived from the super hybrid rice (Oryza sativa L.) cross between XQZB and R9308 was used to identify quantitative trait loci (QTLs) for plant height (PH) and heading date (HD) under low and normal nitrogen conditions. Under both nitrogen levels, 9 QTLs for PH were mapped on chromosomes 2, 3, 6, 7, and 8, and 8 QTLs for HD were mapped on chromosomes 4, 5, 6, 7, and 8. Another 4 QTLs were responsible for the differences of PH and HD between the 2 nitrogen levels. A single QTL explained 5.68–18.40% of the phenotypic variation. Two pleiotropic QTLs with high contributions to the phenotypic variations were located near RM5436 on chromosome 7 and between RM5556 and RM310 on chromosome 8, on which the positive alleles originated from R9308. One QTL for HD difference and one QTL for PH difference were involved in the intervals RM5916-RM166 on chromosome 2 and RM2366-RM5767 on chromosome 8, respectively. Both loci were inferred to directly contribute to nitrogen use efficiency in rice.

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两种氮素水平下水稻株高和抽穗期的qtl

利用XQZB与R9308杂交的超级杂交稻(Oryza sativa L.)重组自交系(RIL)群体，对低氮和正常氮条件下株高(PH)和抽穗期(HD)的数量性状位点(qtl)进行了鉴定。在两个氮水平下，9个PH qtl被定位在2、3、6、7和8号染色体上，8个HD qtl被定位在4、5、6、7和8号染色体上。另外4个qtl负责2个氮素水平间PH和HD的差异。单个QTL解释了5.68 ~ 18.40%的表型变异。表型变异贡献率较高的两个多效性qtl分别位于第7染色体RM5436附近和第8染色体RM5556 ~ RM310之间，阳性等位基因均来自R9308。2号染色体rm5916 ~ rm166和8号染色体rm2366 ~ rm5767区间分别涉及1个HD差异QTL和1个PH差异QTL。这两个基因座与水稻氮素利用效率有直接关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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