数字农科院2.0

Two consensus quantitative trait loci clusters controlling anthesis-silking interval, ear setting and grain yield might be related with drought tolerance in maize

文献类型： 外文期刊

作者： Hao, Z. F.;Li, X. H.;Xie, C. X.;Li, M. S.;Zhang, D. G.;Bai, L.;Zhang, S. H.

作者机构：

关键词： drought tolerance

期刊名称： ANNALS OF APPLIED BIOLOGY

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年卷期：

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收录情况： SCI

摘要： Unravelling the molecular basis of drought tolerance will provide novel opportunities for improving crop yield under water-limited conditions. The present study was conducted to identify quantitative trait loci (QTLs) controlling anthesis-silking interval (ASI), ear setting percentage (ESP) and grain yield (GY). The mapping population included 234 F plants derived from the cross X178 (drought tolerant) x B73 (drought susceptible). The corresponding F: progenies, along with their parents, were evaluated for the above-mentioned traits under both well-watered and water-stressed field conditions in three different trials carried out in central and southern China. Interval mapping and composite interval mapping identified 45 and 65 QTLs for the investigated traits, respectively. Two QTL clusters influencing ASI and ESP on chromosomes 1 (bin 1.03) and 9 (bins 9.03-9.05) were identified in more than two environments, showing sizeable additive effects and contribution to phenotypic variance; these two QTL clusters influenced GY only in one environment. No significant interaction was detected between the two genomic regions. A comparative analysis of these two QTL clusters with the QTLs controlling maize drought tolerance previously described in three mapping populations confirmed and extended their relevance for marker-assisted breeding to improve maize production under water-limited conditions.

分类号： Q

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