Natural genetic variation in caesium (Cs) accumulation by Arabidopsis thaliana
Natural genetic variation in caesium (Cs) accumulation by Arabidopsis thaliana
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DOI：
10.1111/j.1469-8137.2004.01026.x
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发表时间：
2004-05-01
期刊：
影响因子：
9.4
通讯作者：
Broadley, MR
中科院分区：
文献类型：
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作者：
Payne, KA;Bowen, HC;Broadley, MR
摄入铯（Cs）放射性同位素会对人类健康造成威胁。在可食用组织中积累较少Cs的作物品种可能提供有用的对策。本研究旨在确定模式植物的数量遗传学是否来自兰茨贝格直立（Ler）x佛得角岛（Cvi）、Ler x哥伦比亚（Col）和Niederzenz（Nd）x Col作图群体的拟南芥属种质和重组近交系（RILs），生长在琼脂补充亚毒性水平的Cs。芽Cs浓度变化高达3倍，和芽f。野生型在种群内变化高达25倍。生长和铯积累性状的遗传力在0.06 ~ 0.28之间。在Ler × Col群体中，4个QTL对地上部Cs含量表型变异的贡献率大于80%。可以为培育“安全”作物的选择或育种策略提供信息。
Ingestion of caesium (Cs) radioisotopes poses a health risk to humans. Crop varieties that accumulate less Cs in their edible tissues may provide a useful countermeasure. This study was performed to determine whether quantitative genetics on a model plant (Arabidopsis thaliana) might inform such 'safe'-crop strategies.Arabidopsis accessions and recombinant inbred lines (RILs), from Landsberg erecta (Ler) x Cape Verdi Island (Cvi), Ler x Columbia (Col), and Niederzenz (Nd) x Col mapping populations, were grown on agar supplemented with subtoxic levels of Cs.Shoot Cs concentration varied up to three-fold, and shoot f. wt varied up to 25-fold within populations. The heritability of growth and Cs accumulation traits ranged from 0.06 to 0.28. Four quantitative trait loci (QTL) accounted for > 80% of the genetic contribution to the total phenotypic variation in shoot Cs concentration in the Ler x Col population.QTL identified in this study, in particular, QTL co-localizing to the top and bottom regions of Chromosomes I and V in two different mapping populations, are amenable to positional cloning and, through collinearity, may inform selection or breeding strategies for the development of 'safe' crops.