Natural variation in ARF18 gene simultaneously affects seed weight and silique length in polyploid rapeseed

Proceedings of the National Academy of Sciences of the United States of America
Jing LiuHanzhong Wang

Abstract

Seed weight (SW), which is one of the three major factors influencing grain yield, has been widely accepted as a complex trait that is controlled by polygenes, particularly in polyploid crops. Brassica napus L., which is the second leading crop source for vegetable oil around the world, is a tetraploid (4×) species. In the present study, we identified a major quantitative trait locus (QTL) on chromosome A9 of rapeseed in which the genes for SW and silique length (SL) were colocated. By fine mapping and association analysis, we uncovered a 165-bp deletion in the auxin-response factor 18 (ARF18) gene associated with increased SW and SL. ARF18 encodes an auxin-response factor and shows inhibitory activity on downstream auxin genes. This 55-aa deletion prevents ARF18 from forming homodimers, in turn resulting in the loss of binding activity. Furthermore, reciprocal crossing has shown that this QTL affects SW by maternal effects. Transcription analysis has shown that ARF18 regulates cell growth in the silique wall by acting via an auxin-response pathway. Together, our results suggest that ARF18 regulates silique wall development and determines SW via maternal regulation. In addition, our study reveals the first (to our knowledge) QT...Continue Reading

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Sep 24, 2016·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Kang YuAimin Zhang
Jan 22, 2017·Plant Molecular Biology·Lixia ZhuJing Wen
Feb 22, 2017·Molecular Breeding : New Strategies in Plant Improvement·Yuning ChenHuifang Jiang
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Jan 4, 2019·The Plant Journal : for Cell and Molecular Biology·GunNam NaChaofu Lu
Dec 19, 2019·Plant Biotechnology Journal·Quaid HussainHanzhong Wang
Mar 4, 2020·International Journal of Molecular Sciences·Jinshan CaoYouning Wang
Jul 20, 2019·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Wenhao ShenJinxing Tu
Apr 30, 2017·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Ziliang LuoJun Zou
Oct 5, 2018·Frontiers in Plant Science·Linyi QiaoZhijian Chang
May 9, 2019·Science China. Life Sciences
Feb 24, 2019·Annual Review of Plant Biology·Na LiYunhai Li
Feb 1, 2020·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Hao WangDengfeng Hong
Oct 11, 2017·Journal of Experimental Botany·Mark RoosjenDolf Weijers
Jul 20, 2018·Frontiers in Plant Science·Lingjie WuJunhong Zhang

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