New QTLs identified for leaf correlative traits in rice seedlings under cadmium stress

New QTLs identified for leaf correlative traits in rice seedlings under cadmium stress
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镉胁迫下水稻幼苗叶片相关性状的新 QTL 鉴定

DOI:
10.1007/s10725-018-0393-5
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发表时间:
2018-04
影响因子:
4.2
通讯作者:
Xue Dawei
Xue Dawei
中科院分区:
生物学3区
文献类型:
--
作者:
Wang Jiahui;Fang Yunxia;Tian Bin;Zhang Xiaoqin;Zeng Dali;Guo Longbiao;Hu Jiang;Xue Dawei

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镉 (Cd) 是一种非必需有毒金属,近几十年来主要通过人工来源释放到环境中。为了研究水稻苗期镉毒性耐受性的遗传学,在镉胁迫条件下对两个毒性相关性状——卷叶(LR)和绿叶比(GLR)进行了QTL分析。使用来自 ajaponicaJX17 和 indicaZYQ8 杂交的 127 个双单倍体 (DH) 群体的水稻品系,检测到 2 个 LR QTL(qLR-1 和 qLR-9)和 1 个 GLR QTL(qGLR-3)。其中qLR-1和qGLR-3的表型变异分别为19.27和16.09,可用于选育耐镉水稻优良品种的标记辅助选择。结果进一步表明,目视测量幼苗中的 LR 和 GLR 是筛选镉胁迫情况下耐受水稻种质的有效方法。
Cadmium (Cd) is a non-essential toxic metal that is primarily released into the environment from artificial sources in recent decades. To investigate the genetics of Cd toxicity tolerance at the seedling stage in rice, a QTL analysis was carried out under cadmium stress conditions with two toxicity-linked traits—leaf rolling (LR) and the green leaf ratio (GLR). Using 127 rice lines of doubled haploid (DH) population derived from a cross between ajaponicaJX17 andindicaZYQ8, two QTLs for LR (qLR-1andqLR-9) and one QTL for GLR (qGLR-3) were detected. Among them, the phenotypic variation ofqLR-1andqGLR-3were 19.27 and 16.09, values which are useful for marker-assistant selection in breeding elite rice cultivars that have the capacity to tolerate Cd. The results further demonstrate that visual measurements of both LR and GLR in seedlings are effective methods for screening tolerant rice germplasm in cadmium stress scenarios.
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