数字农科院2.0

Detection of QTLs controlling fast kernel dehydration in maize (Zea mays L.)

文献类型： 外文期刊

作者： Qian, Y. L.;Guo, J.;Wang, J.;Qi, Y. C.;Li, T. C.;Zhang, W.;Ruan, L.;Zuo, X. L.;Zhang, X. Q.;Wang, L. F.;Chen, J.;Chen, B. R.;Lv, G. H.;Wu, Z. C.

作者机构：

关键词： Maize;Silking stage;Physiological maturity stage;QTLs;Fast kernel dehydration

期刊名称： GENETICS AND MOLECULAR RESEARCH

ISSN： 1676-5680

年卷期： 2016 年 15 卷 3 期

页码：

收录情况： SCI

摘要： In order to understand the effect of grain moisture of inbred lines at the silking and physiological maturity stages on kernel dehydration rate, 59 maize inbred lines from six subgroups were selected. Grain moisture was measured and QTLs associated with kernel dehydration were mapped. A rapid dehydration evaluation and association analysis revealed eight inbred lines with faster dehydration rate, including Yuanwu 02, K36, Zhonger/O2, Lo1125, Han 49, Qi 319, Hua 160, and PH4CV. A single sequence repeat analysis using 85 pairs detected five QTLs with phenotypic variation contribution >= 10% in the permanent F2 generation populations Zheng 58 x S1776 and Chang 7- 2 x K1131, which had LOD threshold values >= 3 in both 2013 and 2014. The chromosome region of qFkdr7b had not previously been reported and is preliminarily identified as a new major QTL. A false positive field verification of grain dehydration rate of 53 inbred lines indicated that the screening result of the rapid dehydration inbred lines by specific amplification with marker Phi114 was most similar to the field assessment result, followed by markers Phi127 and Phi029. The rapid dehydration lines selected based on primer Phi114 amplification were also similar to the field dehydration rate and can thus be used for molecular marker- assisted selection. A significant effort is needed to improve stress resistance and shorten the growth period via fast kernel dehydration in intermediate materials of the inbred lines K36, Zhonger/O2, Lo1125, Han 49, Hua 160, and PH4CV, and further using the selected lines for new combinations.

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