柚木AFLP标记木材密度性状关联的初步研究

IF 1.7 3区农林科学 Q2 FORESTRY

Annals of Forest Research Pub Date : 2018-07-03 DOI:10.15287/AFR.2018.1018

V. Vaishnav, S. A. Wali, S. B. Tripathi, M. S. Negi, S. A. Ansari

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引用次数: 9

摘要

对46个柚木（Tectona grandis L.f.）基因型的276个AFLP位点与木材密度的相关性进行了评估，证实了基因型之间的遗传结构和9.4%位点对之间的显著连锁不平衡（p<0.01）。对近交系数进行贝叶斯校正的AFLP标记检测到低遗传结构，而高遗传多样性（0.23）和高多态性（57.41±9.62%）。AMOVA在群体中分配了26.34%的变异，在基因型之间分配了73.65%的变异，FST=0.16。木材密度变化率为8.71%，呈显著正态分布。仔细控制结合Q和K的统计估计以避免错误发现，导致四个AFLP基因座与木材密度性状显著相关。这是第一份关于柚木标记-性状关联的报告，而该物种缺乏背景基因组信息。与木材密度性状相关的AFLP标记可以发展为STS标记，用于标记辅助选择和育种，以改善物种的遗传。

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A preliminary investigation on AFLP marker-wood density trait association in teak (Tectona grandis L. f.)

Association between 276 AFLP loci and wood density of 46 teak (Tectona grandis L. f.) genotypes was evaluated, confirming the genetic structure among the genotypes and significant (p < 0.01) linkage disequilibrium between 9.4% loci-pair. AFLP markers with Bayesian correction for inbreeding coefficient detected a low genetic structure vis-a-vis high genetic diversity (0.23) and high polymorphism (57.41 ± 9.62%). AMOVA allocated 26.34% variation among the populations and 73.65% variation among the genotypes with FST = 0.16. The wood density with 8.71% variation displayed significant normal distribution. The careful control of statistical estimates incorporating Q and K to avoid the false discovery resulted in four AFLP loci significantly associated with the wood density trait. This is the first report dealing with marker-trait association in teak against the scarcity of background genomic information in this species. The AFLP markers associated with the wood density trait may be developed into STS markers for marker-assisted selection and breeding for genetic improvement of the species.

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来源期刊

Annals of Forest Research FORESTRY-

CiteScore

2.20

自引率

11.10%

发文量

审稿时长

12 weeks

期刊介绍： Annals of Forest Research is a semestrial open access journal, which publishes research articles, research notes and critical review papers, exclusively in English, on topics dealing with forestry and environmental sciences. The journal promotes high scientific level articles, by following international editorial conventions and by applying a peer-review selection process.