Dosage effect genes modulate grain development in synthesized Triticum durum-Haynaldia villosa allohexaploid

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外文摘要：Polyploidization in plants often leads to increased cell size and grain size,which may be affected by the increased genome dosage and transcription abundance.The synthesized Triticum durum(AABB)-Hay-naldia villosa(VV)amphiploid(AABBVV)has significantly increased grain size,especially grain length,than the tetraploid and diploid parents.To investigate how polyploidization affects grain development at the transcriptional level,we perform transcriptome analysis using the immature seeds of T.durum,H.villosa,and the amphiploid.The dosage effect genes are contributed more by differentially expressed genes from genome V of H.villosa.The dosage effect genes overrepresent grain development-related genes.Inter-estingly,the vernalization gene TaVRN1 is among the positive dosage effect genes in the T.durum-H.villosa and T.turgidum-Ae.tauschii amphiploids.The expression levels of TaVRN1 homologs are positively correlated with the grain size and weight.The TaVRN1-B1 or TaVRN1-D1 mutation shows delayed florescence,decreased cell size,grain size,and grain yield.These data indicate that dosage effect genes could be one of the important explanations for increased grain size by regulating grain development.The identification and functional validation of dosage effect genes may facilitate the finding of valuable genes for improving wheat yield.

外文关键词：

AllopolyploidPolyploidizationDosage effectWheatGrain sizeTaVRN1

作者：

Zhongyu Yu、Baofeng Cui、Jin Xiao、Wu Jiao、Haiyan Wang、Zongkuan Wang、Li Sun、Qingxin Song、Jingya Yuan、Xiue Wang

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作者单位：

State Key Lab of Crop Genetics & Germplasm Enhancement and Utilization,Cytogenetics Institute,Nanjing Agricultural University/JCIC-MCP/Zhongshan Biological Breeding Laboratory,Nanjing,Jiangsu 210095,China

基金：

National Key Research and Development Program of ChinaNational Key Research and Development Program of ChinaNational Natural Science Foundation of ChinaJiangsu Provincial Key Research and Development ProgramSeed Industry Revitalization Project of Jiangsu ProvinceSeed Industry Revitalization Project of Jiangsu ProvinceJiangsu Agricultural Technology SystemJoint Research of Wheat Variety Improvement of Anhui,and Zhongshan Biological Breeding Laboratory(ZSBBL)

项目编号：

2022YFF10029002020YFE020290032270576BE2022346JBGS[2021]006JBGS[2021]013JATS[2023]422ZSBBL-KY2023-02-2

出版年：

2024

DOI：

10.1016/j.jgg.2024.04.010

遗传学报

中国遗传学会中国科学院遗传与发育生物学研究所

遗传学报

CSTPCD

影响因子：0.821

ISSN：1673-8527

年,卷(期)：2024.51(10)