NDLI: Further genetic analysis of a major quantitative trait locus controlling root length and related traits in common wheat

Content Provider	Springer Nature Link
Author	Cao, Pei Ren, Yongzhe Zhang, Kunpu Teng, Wan Zhao, Xueqiang Dong, Zhenying Liu, Xin Qin, Huanju Li, Zhensheng Wang, Daowen Tong, Yiping
Copyright Year	2014
Abstract	Roots are essential for normal growth, development, and reproduction of higher plants. Consequently, improvement of root system architecture and functionality is of fundamental importance in crop improvement. However, the genetic mechanisms controlling root morphology and function are still not well understood, especially in common wheat, which possesses a complex and unsequenced hexaploid genome. Here we report a more detailed genetic analysis of qTaLRO-B1, a major quantitative trait locus (QTL) previously detected to affect root length and related traits in common wheat. A pair of QTL isolines with different qTaLRO-B1 alleles was developed. Line 178B, carrying the longer root allele, was significantly more efficient in taking up phosphate nutrient and biomass accumulation than line 178A, with the shorter root allele. We mapped qTaLRO-B1 to a 0.9-cM interval on common wheat chromosome 2BS with seven sequence-tagged-site (STS) markers developed from the genes conserved between wheat and Brachypodium distachyon. The seven STS markers were collinearly conserved in tetraploid wheat, but they covered a much larger genetic distance (22.8 cM) in the latter species. In conclusion, we have converted qTaLRO-B1 into a major gene that affects common wheat root length in a qualitative manner, and improved understanding of the genetic location of qTaLRO-B1 and the chromosomal segment carrying this important locus. The implications of our data for further study of qTaLRO-B1 are discussed.
Starting Page	975
Ending Page	985
Page Count	11
File Format	PDF
ISSN	13803743
Journal	Molecular Breeding
Volume Number	33
Issue Number	4
e-ISSN	15729788
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-01-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Root Major QTL Genetic mapping Wheat Brachypodium distachyon Plant Sciences Plant Genetics & Genomics Plant Pathology Plant Physiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Molecular Biology Biotechnology Agronomy and Crop Science

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