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Genome-wide association study (GWAS) of major QTLs for bunch and oil yield related traits in Elaeis guineensis L
Plant Science ( IF 5.2 ) Pub Date : 2021-01-15 , DOI: 10.1016/j.plantsci.2020.110810
Kalyana Babu B. , R.K. Mathur , Venu M.V.B. , Sandip Shil , Ravichandran G. , Anita P. , Bhagya H.P.

Oil palm (Elaeis guineensis Jacq.) is a long breeding cycle perennial crop with a genome size of 1.8 Gb. This is the first report of GWAS on large number of 310 African germplasm using 400 SSR markers till date. Highly significant correlation was found between leaf area (LA) and rachis length (RL) (0.75) followed by bunch weight (BW) and bunch index (BI) (0.65), whereas negative correlation was observed between bunch number (BN) and average bunch weight (ABW). First two principal component analysis (PCA) together explained maximum amount of variation (84.5 %). The PCA1 revealed that group 2 (Guinea Bissau and Cameroon) and group 4 (Zambia and Cameroon) genotypes are best suitable for BN, BI and BW traits. GWAS of six bunch yield and seven bunch oil yield traits with SSRs resulted in the identification 43 significant quantitative trait loci (QTLs) by mixed linear model (MLM) approach. Seven SSR loci were found to be linked to oil to dry mesocarp (ODM) on chromosomes 1,4,7,10,12 and 15. The SSR locus mEgCIR1753 for ODM was significantly linked at a p of ≤0.05 which explained 34.6 % of phenotypic variance. The important parameters like ODM, OWM and OB were located on 4, 10, 11 and 15 chromosomes. The leaf area and ODM were associated with candidate genes representing of low-temperature-induced 65 kDa proteins. The identified markers can be effectively used for marker assisted selection of high yielding oil palm genotypes.



中文翻译:

几内亚油菜(Elaeis guineensis L )串和油产量相关性状的主要QTL全基因组关联研究(GWAS)

油棕(油棕)雅克(Jacq。)是一个长繁殖周期的多年生作物,基因组大小为1.8 Gb。迄今为止,这是GWAS关于使用310个非洲种质的400个SSR标记的首份报告。在叶面积(LA)与羽根长度(RL)(0.75)之间,然后与束重(BW)和束指数(BI)(0.65)之间发现高度显着的相关性,而在束数(BN)与平均值之间发现负相关。束重(ABW)。前两个主成分分析(PCA)一起解释了最大变化量(84.5%)。PCA1揭示第2组(几内亚比绍和喀麦隆)和第4组(赞比亚和喀麦隆)的基因型最适合BN,BI和BW性状。利用SSRs的6束和7束油产量性状的GWAS通过混合线性模型(MLM)方法鉴定出43个显着的数量性状基因座(QTL)。发现七个SSR基因座与1、4、7、10、12和15号染色体上的油与干中果皮(ODM)连锁。ODM的SSR基因座mEgCIR1753在ap≤0.05时显着相关,这解释了表型的34.6%。方差。ODM,OWM和OB等重要参数位于4、10、11和15条染色体上。叶面积和ODM与代表低温诱导的65 kDa蛋白的候选基因相关。鉴定出的标记可以有效地用于标记辅助选择高产油棕基因型。ODM的SSR基因座mEgCIR1753在ap≤0.05时显着相关,这解释了34.6%的表型变异。ODM,OWM和OB等重要参数位于4、10、11和15条染色体上。叶面积和ODM与代表低温诱导的65 kDa蛋白的候选基因相关。鉴定出的标记可以有效地用于标记辅助选择高产油棕基因型。ODM的SSR基因座mEgCIR1753在ap≤0.05时显着相关,这解释了34.6%的表型变异。ODM,OWM和OB等重要参数位于4、10、11和15条染色体上。叶面积和ODM与代表低温诱导的65 kDa蛋白的候选基因相关。鉴定出的标记可以有效地用于标记辅助选择高产油棕基因型。

更新日期:2021-01-28
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