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| Genetic mapping and expressivity of a wheat multi-pistil gene in mutant 12TP |
ZHU Xin-xin1, NI Yong-jing1, 2, HE Rui-shi1, JIANG Yu-mei1, LI Qiao-yun1, NIU Ji-shan1 |
1 National Centre of Engineering and Technological Research for Wheat/Key Laboratory of Physiological Ecology and Genetic Improvement of Food Crops in Henan Province/College of Agronomy, Henan Agricultural University, Zhengzhou 450046, P.R.China
2 Shangqiu Academy of Agricultural and Forestry Sciences, Shangqiu 476000, P.R.China |
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Abstract We identified a wheat (Triticum aestivum L.) multi-pistil mutant from an F2 breeding population in 2012, named 12TP (three pistils in one floret). Genetic analysis showed that one dominant gene locus controlled the multi-pistil trait. Using homozygous normal and multi-pistil lines (near-isogenic lines; NILs) derived from the original mutant 12TP, a simple sequence repeat (SSR) marker assay located the 12TP locus on chromosome arm 2DL. Four SSR markers were linked to 12TP and their order was Xcfd233→Xcfd62-12TP→Xwmc41→Xcfd168 at 15.85, 10.47, 2.89, and 10.37 cM, respectively. The average genetic expressivity of the trait ‘three pistils in one floret’ was more than 98% in seven homozygous 12TP lines; however, the average genetic expressivity in heterozygous F1 plants was about 49%. Thus, the 12TP is a semi-dominant gene locus, which differ from all previously reported multi-pistil mutants. Mutant 12TP is a new useful germplasm for study of wheat floral development and for breeding of high yield wheat.
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Received: 05 November 2017
Accepted:
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| Fund: This project was supported by the National Science Fund of China (31571646) and the Special Fund for Key Agricultural Project in Henan Province, China in 2016 (161100110400). |
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Corresponding Authors:
Correspondence NIU Ji-shan, E-mail: jsniu@263.net
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| About author: ZHU Xin-xin, E-mail: xzx1202@126.com; |
Cite this article:
ZHU Xin-xin, NI Yong-jing, HE Rui-shi, JIANG Yu-mei, LI Qiao-yun, NIU Ji-shan.
2019.
Genetic mapping and expressivity of a wheat multi-pistil gene in mutant 12TP. Journal of Integrative Agriculture, 18(3): 532-538.
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