NDLI: Breeding strategies for optimum heading date using genotypic information in rice

Content Provider	Springer Nature Link
Author	Wei, Xiangjin Liu, Linglong Xu, Junfeng Jiang, Ling Zhang, Wenwei Wang, Jiankang Zhai, Huqu Wan, Jianmin
Copyright Year	2009
Abstract	Heading date (HD) is a key trait for the adaptation of rice cultivar to a specific growing region. Here, we report conventional and marker-assisted breeding strategies using genetic information related to the determination of HD, where the breeding objectives were to avoid the delayed heading common in indica × japonica hybrids, to increase the efficiency in selecting hybrid rice combinations having a suitable growth duration, and to develop cultivars with target growth duration by quantitative trait locus (QTL) pyramiding. The allelic constitution at the major HD loci was determined for a set of 109 leading Chinese rice cultivars by crossing them with HD tester lines. It was shown that the late heading in indica × japonica hybrids can be overcome by replacing the strong photoperiod-sensitivity allele Se-1 $^{n}$ with Se-1 $^{e}$. A breeding strategy to enable the selection of hybrid combinations with suitable growth duration was proposed, based on HD genotypic information in rice. Meanwhile, a QTL analysis for HD was conducted over five years based on a recombinant inbred line population, derived from two parents Asominori (japonica) and IR24 (indica). Four QTLs, located on chromosomes 2, 3, 6, and 8, respectively, could be detected in all five years, indicating they were stably expressed QTL. According to this QTL information, and taking Asominori as an example, the HD genotypes for improving the growth duration were designed, and the best breeding selection schemes were determined by use of a genetic breeding simulation tool. Results obtained in this study demonstrate that genetic information related to HD can make a significant contribution to rice breeding.
Starting Page	287
Ending Page	298
Page Count	12
File Format	PDF
ISSN	13803743
Journal	Molecular Breeding
Volume Number	25
Issue Number	2
e-ISSN	15729788
Language	English
Publisher	Springer Netherlands
Publisher Date	2009-09-24
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Breeding Heading date Heterosis QTL pyramiding Rice Biotechnology Plant Physiology Plant Sciences Plant Pathology Plant Genetics & Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Molecular Biology Biotechnology Agronomy and Crop Science

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