Quantitative trait loci mapping and stability for low temperature germination ability of rice

文献类型: 外文期刊

第一作者: Ji, S. L.

作者: Ji, S. L.;Jiang, L.;Wang, Y. H.;Zhang, W. W.;Liu, X.;Liu, S. J.;Chen, L. M.;Wan, J. M.;Zhai, H. Q.;Wan, J. M.

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关键词: low temperature;germination rate;germination time;germination ability

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

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收录情况: SCI

摘要: A high rate of germination at low temperatures is necessary for economic yields to be maintained. In this paper, the genetic control of low temperature germination ability (LTG) was assessed by the measurement of germination rate (GR), germination rate index (GI) and mean germination time (MGT), and genetically mapped using a set of recombinant inbred lines, derived from a cross between the japonica cultivar 'Asominori' and the indica cultivar 'IR24'. Putative quantitative trait loci (QTL) were validated by testing in two related sets of chromosome segment substitution lines (CSSL). In this genetic background, LTG is under the control of a number of QTL, each of relatively small effect, and is spread over six chromosomes. The most stable of these QTL was for GR, mapping to a segment of chromosome 11 which also carries a QTL for GI. On chromosome 2, qGR-2 not only controlled GR, but also was associated with GI and MGT. Significant differences in LTG were detected between 'Asominori' and some CSSL harbouring qGR-2 or qGR-11.

分类号: S3

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