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| 1 | SNP-based QTL mapping for panicle traits in the japonica super rice cultivar Liaoxing 1显示文摘Panicle traits directly associated with yield are a target of selection in rice breeding.Although abundant QTL for panicle traits have been identified,there is little information about the genetic basis of panicle traits in japonica super rice(JSR)cultivars.In this study,we identified QTL for panicle traits in three environments using a population of recombinant inbred lines(RILs)derived from the JSR cultivar Liaoxing 1.A total of 197 RILs were genotyped with 285 polymorphic SNP markers.Phenotypic data and best linear unbiased prediction(BLUP)value of primary branch number(BNP),secondary branch number(BNS),grain number on primary branch(GNP),grain number on secondary branch(GNS),grain number per panicle(GN),panicle length(PL)and grain density(GD)were used for QTL mapping.A total of 105 QTL for seven panicle traits were detected in single environments using their BLUP values.Individual QTL explained 0.51%–52.22%of the phenotypic variation.Of the 105,49 were also detected by joint multi-environment analyses.Five stable QTL:qGD9,qPL9,qGNP9,qGN6,and qBNS6.2 were identified in multiple environments.qGD9,qGNP9,and qPL9,co-localizing on chromosome 9,likely correspond to the known gene DEP1.Importantly,qGN6 and qBNS6.2 in a co-localization region were identified as novel QTL,and their Liaoxing 1 alleles had a positive effect.Several RILs with the QTL allele combinations qGD9/qPL9/qGNP9 and qGN6/qBNS6.2 showed greater GN.Further investigation of the putative gene underlying qGN6/qBNS6.2 would shed light on the molecular mechanism of JSR. | Mingzhu Zhao Zuobin Ma Lili Wang Zhiqiang Tang Ting Mao Chuanbin Liang Hong Gao Liying Zhang Na He Liang Fu Changhua Wang Guomin Sui Wenjing Zheng | 2020 | The Crop Journal2020，8，5： | 4 |
| 2 | Identification of main effect and epistatic QTLs controlling initial flowering date in cultivated peanut(Arachis hypogaea L.)显示文摘Initial flowering date(IFD)is closely related to mature period of peanut pods.In present study,a population of recombinant inbred lines(RIL)derived from the cross between Silihong(female parent)and Jinonghei 3(male parent)was used to map QTLs associated with IFD.The RIL population and its two parental cultivars were planted in two locations of Hebei Province,China from 2015 to 2018(eight environments).Based on a high-density genetic linkage map(including 2996 SNP and 330 SSR markers)previously constructed in our laboratory,QTLs were analyzed using phenotypic data and the best linear unbiased prediction(BLUP)value of initial flowering date by inclusive composite interval mapping(ICIM)method.Interaction effects between every two QTLs and between individual QTL and environment were also analyzed.In cultivated peanut,IFD was affected by genotypic factor and environments simultaneously,and its broad sense heritability(h2)was estimated as 86.8%。Using the IFD phenotypic data from the eight environments,a total of 19 QTLs for IFD were detected,and the phenotypic variation explained(PVE)by each QTL ranged from 1.15 to 21.82%.Especially,five of them were also detected by the BLUP value of IFD.In addition,12 additive QTLs and 35 pairs of epistatic QTLs(62 loci involved)were identifed by the joint analysis of IFD across eight environments.Three QTLs(qIFDB04.1,qIFDB07.1 and qIFDB08.1)located on chromosome B04,B07 and B08 were identified as main-effect QTL for IFD,which had the most potential to be used in peanut breeding.This study would be helpful for the early-maturity and adaptability breeding in cultivated peanut. | WANG Liang YANG Xin-lei CUI Shun-li WANG Ji-hong HOU Ming-yu MU Guo-jun LI Zi-chao LIU Li-feng | 2020 | Journal of Integrative Agriculture2020，19，10： | 1 |
| 3 | 花生平均每荚果籽仁数性状QTL分析显示文摘每荚果籽仁数不仅是花生重要的品种特性,也与花生产量密切相关。为挖掘花生每荚果籽仁数性状相关QTL,以花育36号和6-13为亲本构建的重组自交系(recombinant inbred line,RIL)群体为材料,考察了该群体在2019、2020年连续在青岛、东营两地的平均每荚果籽仁数表型。结果发现,该性状表现为连续分布和超亲遗传,广义遗传率为0.78。利用前期构建的遗传图谱,基于单环境QTL分析共定位到6个QTL,表型贡献率变异范围为5.01%~24.00%,检测到可在不同环境稳定表达的主效位点qAKN16和qAKN19,其增效等位基因均来自亲本6-13;检测到3对上位性QTL,涉及6个位点,表型贡献率为21.14%~27.91%。基于多环境联合QTL分析,共检测到10个加性QTL,加性效应与环境互作对表型贡献率为0.10%~3.99%;共检测到25对上位性互作,共涉及35个标记区间,上位性效应与环境互作对表型贡献率≤2.19%。以上定位的加性和上位性QTL,为后续相关基因图位克隆和分子设计育种提供了重要的理论基础。 | 张胜忠 胡晓辉 王菲菲 慈敦伟 杨伟强 钟文 于豪谅 周克福 苗华荣 陈静 | 2023 | 中国油料作物学报2023，45，2： | 0 |
| 4 | 栽培种花生出仁率QTL定位分析显示文摘为探索栽培种花生出仁率的遗传机制,以花育36号与6-13为亲本构建了包含181个家系的重组自交系(recombinant inbred line,RIL)群体,以该群体F2:9代为试验材料,测定了2个环境下的出仁率表型数据,利用3种方法(单环境分析、多环境联合分析和上位性互作分析)进行相关QTL定位。结果表明,在不同环境下RIL群体出仁率均表现为超亲遗传,广义遗传率为0.79。基于单环境QTL分析,共检测到6个相关位点qKP7、qKP8、qKP9、qKP13、qKP16和qKP18,分布于6个连锁群上,表型贡献率为4.20%~15.14%。其中qKP7和qKP9在两个环境下均稳定表达,且qKP7表型贡献率大于10%,为主效QTL。基于多环境联合分析,发现这6个QTL的加性效应对表型的总贡献率为38.57%,加性与环境互作效应对表型总贡献率为4.13%。上位性互作分析共检测到6对上位性QTL,共涉及10个位点,分别位于第3、7、11、12、15、16、17、18染色体,上位性互作对表型贡献率为2.90%~4.58%,上位性QTL与环境互作对表型的总贡献率为0.49%。本研究定位到6个主效应QTL和6对上位性QTL,为后续相关基因克隆和花生出仁率性状改良提供理论基础。 | 张胜忠 胡晓辉 杨珍 徐胜 郭进涛 侯刚 张智猛 苗华荣 陈静 | 2020 | 花生学报2020，49，4： | 0 |
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