QTL detected for grain-filling rate in maize using a RIL population

被引：42

作者：

Liu, Z. H. ^{[1
]}

Ji, H. Q. ^{[1
]}

Cui, Z. T. ^{[1
]}

Wu, X. ^{[1
]}

Duan, L. J. ^{[1
]}

Feng, X. X. ^{[1
]}

Tang, J. H. ^{[1
]}

机构：

[1] Henan Agr Univ, Coll Agron, Zhengzhou 450002, Peoples R China

来源：

MOLECULAR BREEDING | 2011年 / 27卷 / 01期

关键词：

Grain-filling rate; Genetic basis; QTL mapping; Maize; ORYZA-SATIVA L; QUANTITATIVE TRAIT LOCI; DRY-MATTER ACCUMULATION; SOURCE-SINK RATIO; ZEA-MAYS-L; DEVELOPMENTAL BEHAVIOR; TILLER NUMBER; MOLECULAR DISSECTION; KERNEL WEIGHT; PLANT HEIGHT;

D O I：

10.1007/s11032-010-9410-8

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The grain-filling rate plays an important role in determining grain yield. To elucidate the genetic basis of the grain-filling rate, a set of 203 recombinant inbred lines was evaluated at two locations over 2 years. Quantitative trait loci (QTL) for grain-filling rate were detected using conditional and unconditional QTL analysis of genetic linkage maps comprising 217 SSR markers. The results showed that the grain-filling rate increased between 15 and 35 days after pollination, then decreased at the last two sampling times. Hybrids with high grain-filling rates determined the grain yield in those areas with a short growth season for maize. A total of 23 unconditional QTL for grain-filling rate were detected using the 100-kernel weight as the input data at different sampling stages. They were distributed on 10 chromosomes (except chromosome 9), and some QTL were detected at different sampling stages. In addition, nine conditional QTL were identified using the average increase in 100-kernel weight of per day between two sampling times, and six conditional QTL were detected simultaneously using the unconditional QTL mapping strategy. The QTL mapping results demonstrated that the grain-filling rate is controlled by a complex genetic mechanism, and the QTL detected at different sampling stages might be important contributors to grain yield in maize.

引用

页码：25 / 36

页数：12

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