Identification of main effect and epistatic QTLs controlling initial flowering date in cultivated peanut (Arachis hypogaea L.)
文献类型： 外文期刊
作者： Wang Liang 1 ; Yang Xin-lei 1 ; Cui Shun-li 1 ; Wang Ji-hong 4 ; Hou Ming-yu 1 ; Mu Guo-jun 1 ; Li Zi-chao 2 ; Liu Li-fen 1 ;
作者机构： 1.Hebei Agr Univ, Coll Agron, State Key Lab North China Crop Improv, Minist Educ,North China Key Lab Crop Germplasm Re, Baoding 071001, Peoples R China
2.China Agr Univ, Beijing Key Lab Crop Genet Improvement, Key Lab Crop Heterosis & Utilizat, Minist Educ,Coll Agron & Biotechnol, Beijing 100193, Peoples R China
3.Xinjiang Acad Agr & Reclamat Sci, Crop Res Inst, Shihezi 832000, Peoples R China
4.Univ Int Business & Econ, Sch Stat, Beijing 100029, Peoples R China
5.Shihezi Univ, Coll Sci, Shihezi 832003, Peoples R China
关键词： peanut (Arachis hypogaea L.); initial flowering date (IFD); QTL; best linear unbiased prediction (BLUP); ICIM
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）
ISSN： 2095-3119
年卷期： 2020 年 19 卷 10 期
页码：
收录情况： SCI
摘要： 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 2 996 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 (h(2)) 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 identified 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.
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