Characterization of three wheat grain weight QTLs that differentially affect kernel dimensions

TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik
Yulong HuangZhengqiang Ma

Abstract

The QGw.nau - 2D, QGw.nau - 4B and QGw.nau - 5A intervals were investigated for their effects on weight, length, width, and thickness of kernels and their differential roles in determining kernel size and shape were demonstrated. Grain weight (GW) contributes greatly to wheat yield and is directly related to kernel size and shape. Although over 100 quantitative trait loci (QTLs) for GW have been reported in the literatures, few have been well characterized for their association with kernel traits. In this study, three GW QTLs identified in elite cultivar 'Nanda2419' ('Mentana'), including QGw.nau-2D, QGw.nau-4B and QGw.nau-5A, were investigated through near isogenic line (NIL) development and evaluation. NILs for all three QTLs and one NIL with both QGw.nau-4B and QGw.nau-5A were developed with the help of marker-assisted selection after two to three generations of backcross using cultivar 'Wangshuibai' as the recurrent parent. One NIL with QGw.nau-4B in the background of cultivar 'Wenmai6' was also obtained. In four different field trials, these NILs consistently produced heavier kernels than the recurrent parents. QGw.nau-4B showed the largest effect on GW; its presence resulted in 0.4-0.5 g increase of hundred-grain weight, ...Continue Reading

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Citations

Nov 14, 2018·Journal of Integrative Plant Biology·Jemima Brinton, Cristobal Uauy
Jun 4, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Panfeng GuanHuiru Peng
Oct 2, 2019·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Zhaoyan ChenZhongfu Ni
Apr 25, 2016·Journal of Applied Genetics·Volker MohlerLorenz Hartl
Oct 1, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Qiaoling LuoZhensheng Li
Jun 3, 2018·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Faji LiXianchun Xia
Mar 3, 2019·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Jian YangTingjie Cao

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