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Haplotype variation of Green Revolution gene rht-d1 during wheat domestication and improvement

Journal of Integrative Plant Biology 2014年第8期56卷 774-780页

作者： Chihong Zhang Lifeng Gao Jiaqiang Sun Jizeng Jia Zhenglong Ren Agronomy department Sichuan Agricultural University Institute of Crop Sciences Chinese Academy of Agricultural Sciences Key Laboratory of Crop Germplasm and Biotechnology Ministry of Agriculture Chengdu Institution of Biology theChinese Academy of Sciences

Green Revolution made a substantial contribution to wheat yields worldwide in the 196os and 197os. It is of great importance to analyze the haplotype variation of rht-d1, the Green Revolution gene, during wheat （Triticum aestivum L.） domestication and breeding to understand its evolution and function in wheat breeding history. In this study, the rht-d1 and its flanking regions were sequenced and single nucleotide polymorphisms were detected based on a panel of 45 accessions of Aegilops tauschii, 51 accessions of landraces and 8o accessions of commercial varieties. Genetic diversity in the wild accessions was much higher than that in the varieties and higher than that reported previously. Seven haplotypes （Hapl I to Hapl VII） of rht-d1 were identified and their evolutionary relationships were proposed. In addition to the well-known Green Revolution allele rht-dlb, Hapl Vii （an allele rht-dlk） was identified in early breeding varieties, whichreduced plant height by 16%. The results suggested that rht-dlk had been used in breeding before the Green Revolution and made a great contribution to wheat production worldwide. Based on the breeding history and molecular evidence, we proposed that the wheat Green Revolution in China and International Maize and Wheat Improvement Center （CIMMYT） occurred independently.

关键词： diversity haplotype rht-d1 single nucleotidepolymorphism wheat

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Genome-wide association study in historical and contemporary *** wheats identifies heightreducing loci

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The Crop Journal 2020年第2期8卷 243-251页

作者： Sintayehu d.daba Priyanka Tyagi Gina Brown-Guedira Mohsen Mohammadi department of Agronomy Purdue UniversityWest LafayetteIN 47907USA department of Crop and Soil Sciences North Carolina State UniversityRaleighNC 27695USA U.S.department of Agriculture Agricultural Research ServicesSoutheast AreaPlant Science ResearchRaleighNC 27695USA

Plant height has been a major target for selection of high-yielding varieties in *** height-reducing loci(rht-B1 and rht-d1)have been widely used since the Green ***,these genes also negatively affect other agronomic traits such as kernel *** alternative height-reducing loci could benefit wheat *** study focused on the genetics of plant height in 260 historical and contemporary winter wheat accessions via genome-wide association studies using 38,693 single nucleotide polymorphism(SNP)markers generated through genotyping by sequencing,two Kompetitive Allele Specific Polymorphismmarkers,and phenotypic data recorded in two seasons(2016 and 2018).The 260 accessions showed wide variation in plant *** accessions developed after 1960 were shorter than earlier *** broad-sense heritability for plant height was high(H2=0.82),whichwas also supported by a high correlation(r=0.82,P1)between heights from the two *** detected a total of 16 marker–trait associations(MTAs)for plant height at–lg(P)≥4.0 on chromosomes 1A,2B,2d,3B,4d,5A,5d,6A,6B,7A,and *** detected three of the MTAs(QPLH-2d,QPLH-4B.2,and QPLH-4d)consistently in individual-year and combined-year *** MTAs individually explained 10%–16%of phenotypic *** heightreducing alleles at these threeMTAs appeared after 1960 and increased in frequency *** the genes near these loci were gibberellic acid insensitive(GAI)and GRAS transcription factor(GIBBERELLIC-ACId INSENSITIVE(GAI),REPRESSOR of GAI(RGA),and SCARECROW(SCR)).The evidence from this study and previous reports suggests that QPLH-2d is rht8.A gene encoding a GRAS transcription factor is located near *** of the QPLH-2d locus and associated candidate genes awaits further study.

关键词： GWAS Marker-trait associations rht-B1 rht-d1 Candidate genes Position-dependent procedures

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小麦株高QTL的定位及对重要农艺性状的多效性分析

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麦类作物学报 2023年第12期43卷 1534-1542页

作者：赵蝶胡文静高德荣方正武王书平程晓明张晓祥长江大学农学院湖北荆州434025 江苏里下河地区农业科学研究所/农业农村部长江中下游小麦生物学与遗传育种重点实验室江苏扬州225007 扬州大学/江苏省粮食作物现代产业技术协同创新中心/江苏省植物功能基因组学重点实验室江苏扬州225009

株高作为小麦育种的重要指标,对产量具有较大的影响。为进一步挖掘小麦株高的数量性状位点(quantitative trait loci,QTL),本研究以扬麦12和偃展1号杂交得到的包含205个家系的重组自交系(recombinant inbred lines,RIL)群体为材料,利用... 详细信息

株高作为小麦育种的重要指标,对产量具有较大的影响。为进一步挖掘小麦株高的数量性状位点(quantitative trait loci,QTL),本研究以扬麦12和偃展1号杂交得到的包含205个家系的重组自交系(recombinant inbred lines,RIL)群体为材料,利用小麦55K SNP芯片构建高密度遗传图谱,结合3年共6个环境的表型数据对株高性状进行QTL定位分析。结果表明,在染色体2B(1)、4B(1)、4d(1)、5A(1)、5B(1)和7d(2)上共检测到7个与株高相关的QTL。***-4B、***-5A和***-7d.1的矮秆效应来源于扬麦12,其余4个QTL的矮秆效应来源于偃展1号。在6个环境下都能检测到的位点是***-4B和***-4d,对株高的贡献率分别14.50%~24.09%和19.01%~29.80%,经过比对发现,这2个QTL分别是rht1和rht2。***-5A在5个环境下被检测到,对株高的贡献率为3.29%~5.36%;***-2d和***-7d.2在4个环境中均被检测到,对株高的贡献率分别为3.45%~6.14%和3.16%~4.10%;***-5B和***-7d.1分别在2个和3个环境中被检测到,对株高的贡献率分别是2.27%~5.09%和2.72%~4.82%。QTL比较分析后发现,***-7d.1和***-7d.2可能是新的株高位点。研究rht-B1和rht-d1对千粒重、穗长和穗粒数的效应,发现rht-B1位点对这些农艺性状无显著效应,rht-d1位点仅对千粒重有显著效应,其株高增效等位变异可显著增加千粒重。在自然群体中验证rht-B1和rht-d1的效应结果与RIL群体结果一致。

关键词：小麦株高 QTL rht-B1 rht-d1

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