Journal of Integrative Agriculture ›› 2023, Vol. 22 ›› Issue (9): 2603-2616.DOI: 10.1016/j.jia.2023.02.013

• •    下一篇

普通小麦科农9204高产潜力关键区段的解析

  

  • 收稿日期:2022-09-02 接受日期:2022-11-14 出版日期:2023-09-20 发布日期:2023-09-20

Dissecting the key genomic regions underlying high yield potential in common wheat variety ‘Kenong 9204’

ZHAO Chun-hua1*, ZHANG Na2*, FAN Xiao-li3, JI Jun4, 5, SHI Xiao-li4, CUI Fa1#, LING Hong-qing4#, LI Jun-ming5, 6#   

  1. 1 College of Agriculture, Ludong University/Key Laboratory of Molecular Module-based Breeding of High Yield and Abiotic Resistant Plants in Universities of Shandong, Yantai 264025, P.R.China
    2 Jiangsu Xuhuai Regional Institute of Agricultural Sciences, Xuzhou 221131, P.R.China
    3 Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, P.R.China
    4 State Key Laboratory of Plant Cell and Chromosome Engineering, Institute of Genetics and Developmental Biology, Innovation Academy for Seed Design, Chinese Academy of Sciences, Beijng 100101, P.R.China
    5 Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Shijiazhuang 050022, P.R.China
    6 Key Laboratory of Molecular and Cellular Biology, Ministry of Education/Hebei Collaboration Innovation Center for Cell Signaling/Hebei Key Laboratory of Molecular and Cellular Biology/College of Life Sciences, Hebei Normal University, Shijiazhuang 050024, P.R.China
  • Received:2022-09-02 Accepted:2022-11-14 Online:2023-09-20 Published:2023-09-20
  • About author:ZHAO Chun-hua, E-mail: sdauzch@126.com; ZHANG Na, zhangna2nina@163.com; #Correspondence CUI Fa, Tel: +86-535-6223193, E-mail: sdaucf@126.com; LING Hong-qing, E-mail: hqling@genetics.ac.cn; LI Jun-ming, E-mail: ljm@sjziam.ac.cn * These authors contributed equally to this study.
  • Supported by:
    This research was jointly supported by the grants from the Shandong Major Basic Research Project of Natural Science Foundation, China (ZR2019ZD16), the Shandong Provincial Key Research and Development Program, China (2019GNC106126 and 2021LZGC009), the Natural Science Foundation of Hebei Province, China (C2021205013), the Hebei Scientific and Technological Innovation Team of Modern Wheat Seed Industry, China (21326318D), the National Natural Science Foundation of China (31871612, 31901535, and 32101726), and the China Agriculture Research System of MOF and MARA (CARS-03).

摘要:

骨干亲本在改良小麦产量和品质利用方面发挥重要作用。研究骨干亲本中某些有益性状的遗传基础将为分子育种提供理论参考。科农9204是具有理想株型、产量潜力高、氮肥利用率高的候选骨干亲本。为了更好地了解其高产潜力的遗传基础,我们对KN9204和它的亲本及其衍生品系进行了高通量全基因组重测序(10×)。通过鉴定双亲本定位群体中优良的产量相关数量性状位点(QTL),构建了KN9204的高分辨率遗传组成图谱,显示了有利基因组片段的亲本来源。小偃693是小麦-偃麦草部分双二倍体,对KN9204的高产潜力贡献很大。本研究对来源于小偃6934个主要稳定QTL进行了精细定位,阐述了KN9204关键基因组片段在其衍生品系中的的传递,表明含有有益基因组合的单倍型块和育种者的定向选择都是保守的,选择育种在本研究中被证实。本研究为利用分子设计方法育种高产小麦品种提供了理论参考。

Abstract: The foundation parents play key roles in the genetic improvement of both yield potential and end-use quality in wheat.  Characterizing the genetic basis that underlies certain beneficial traits in the foundation parents will provide theoretical reference for molecular breeding by a design approach.  ‘Kenong 9204’ (KN9204) is a candidate foundation parent characterized by ideotype, high yield potential, and particularly high nitrogen fertilizer utilization.  To better understand the genetic basis of its high yield potential, high throughput whole-genome re-sequencing (10×) was performed on KN9204, its parental lines and its derivatives.  A high-resolution genetic composition map of KN9204 was constructed, which showed the parental origin of the favorable genomic segments based on the identification of excellent yield-related quantitative trait loci (QTL) from a bi-parental mapping population.  Xiaoyan 693 (XY693), a wheat–Thinopyrum ponticum partial amphidiploid, contributed a great deal to the high yield potential of KN9204, and three major stable QTLs from XY693 were fine mapped.  The transmissibility of key genomic segments from KN9204 to its derivatives were delineated, indicating that haplotype blocks containing beneficial gene combinations were conserved along with directional selection by breeders.  Evidence for selection sweeps in the breeding programs was identified.  This study provides a theoretical reference for the breeding of high-yield wheat varieties by a molecular design approach.

Key words: Kenong 9204 ,  high-yielding potential ,  quantitative trait locus ,  genetic composition map ,  key genomic regions