Genetic mapping and expressivity of a wheat multi-pistil gene in mutant 12TP

ZHU Xin-xin; NI Yong-jing; HE Rui-shi; JIANG Yu-mei; LI Qiao-yun; NIU Ji-shan

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Genetic mapping and expressivity of a wheat multi-pistil gene in mutant 12TP

机译：小麦多雌蕊基因在12TP突变体中的遗传定位及表达

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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.

机译：我们从2012年的一个F2育种种群中鉴定了一个小麦多雌蕊突变体，命名为12TP（一个小花中有三个雌蕊），遗传分析表明一个显性基因位点控制了多雌蕊性状。和从原始突变体12TP衍生的多雌蕊品系（近等基因系），通过简单的序列重复（SSR）标记测定法将12TP基因座定位在2DL染色体臂上。四个SSR标记与12TP连锁，顺序为Xcfd233 →Xcfd62-12TP→Xwmc41→Xcfd168分别为15.85、10.47、2.89和10.37 cM。在7个纯合12TP品系中，“一个小花中的三个雌蕊”性状的平均遗传表达高于98％。杂合F1植物的遗传表达约为49％。因此，12TP是半显性基因位点，与以前报道的所有多雌蕊突变体不同。突变12TP是用于研究小麦花发育和育种的新有用种质。高产小麦。

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《农业科学学报（英文版）》 |2019年第3期|532-538|共7页
作者
ZHU Xin-xin; NI Yong-jing; HE Rui-shi; JIANG Yu-mei; LI Qiao-yun; NIU Ji-shan;
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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;

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;

Shangqiu Academy of Agricultural and Forestry Sciences, Shangqiu 476000, P.R.China;

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;

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;

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;

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;

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Genetic mapping and expressivity of a wheat multi-pistil gene in mutant 12TP

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