Quantitative trait locus mapping for seed artificial aging traits using an F-2:3 population and a recombinant inbred line population crossed from two highly related maize inbreds

文献类型： 外文期刊

第一作者： Liu, Yanan

作者： Liu, Yanan;Li, Xuhui;Wang, Feng;Lyle, Demar;Sun, Lianjun;Wang, Jianhua;Li, Li;Gu, Riliang;Zhang, Hongwei;Wang, Guoying

作者机构：

关键词： artificial aging; longevity; maize; quantitative trait locus; seed vigour

期刊名称：PLANT BREEDING （ 影响因子：1.832； 五年影响因子：1.956 ）

ISSN： 0179-9541

年卷期： 2019 年 138 卷 1 期

页码：

收录情况： SCI

摘要： Quantitative trait locus (QTL) mapping for seed longevity is essential for breeding modern cultivars with resistance to deterioration during postharvest storage. The inbred lines X178 and I178 showed large differences in seed vigour after artificial aging treatment, while they had similar performances in terms of most agronomic traits. An F-2:3 population and a recombinant inbred line (RIL) population were generated to map QTL after 5 days under artificial aging conditions. Positive correlations were observed among all investigated traits including the aging germination rate, relative aging germination rate, aging simple vigour index, aging primary root length, aging shoot length and aging total length. Thirteen QTL were identified to locate on five chromosome regions: Chr.1:297 Mb (chromosome 1 region 297 Mb), Chr.3:205 Mb, Chr.4:240 Mb, Chr.5:205 Mb and Chr.7:155 Mb, with 2 to 4 QTL co-located on a region. In each region, 3-8 previously identified aging-related QTL were located, confirming the importance of these regions for controlling seed longevity in different maize populations. Taken together, the results of this work provide a foundation for further QTL fine mapping and the molecular-assisted breeding of aging tolerant maize.

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