Genomewide Selection for Rapid Introgression of Exotic Germplasm in Maize
Genomewide Selection for Rapid Introgression of Exotic Germplasm in Maize
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DOI：
10.2135/cropsci2008.08.0452
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发表时间：
2009-03-01
期刊：
影响因子：
2.3
通讯作者：
Bernardo, Rex
中科院分区：
文献类型：
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作者：
Bernardo, Rex
适应性玉米与外来玉米 (Zea mays L.) 杂交中预育种所需的时间长度阻碍了育种者利用外来种质。我在这项研究中的目的是通过模拟确定全基因组选择对于快速改进适应性 x 外来杂交的有用性。我模拟了来自适应性 x 外来玉米杂交的 F-2、BC1 和 BC2 群体。适应的近交系在 L-适应 = 50 个数量性状基因座 (QTL) 处具有有利的等位基因，而外来近交系在 L-外来 = 50、25、10 或 5 个 QTL 处具有有利的等位基因。通过最佳线性无偏预测拟合 512 个标记的联合效应。对于 L-异国情调
The length of time needed for prebreeding in adapted x exotic maize (Zea mays L.) crosses has deterred breeders from exploiting exotic germplasm. My objective in this study was to determine, by simulation, the usefulness of genomewide selection for the rapid improvement of an adapted x exotic cross. I simulated F-2, BC1, and BC2 populations from an adapted x exotic maize cross. The adapted inbred had the favorable allele at L-Adapted = 50 quantitative trait loci (QTL), whereas the exotic inbred had the favorable allele at L-Exotic = 50, 25, 10, or 5 QTL. The joint effects of 512 markers were fitted by best linear unbiased prediction. For L-Exotic