Genomewide Selection with Minimal Crossing in Self-Pollinated Crops
Genomewide Selection with Minimal Crossing in Self-Pollinated Crops
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DOI：
10.2135/cropsci2009.05.0250
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发表时间：
2010-03-01
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
植物中的全基因组选择集中在异花授粉物种，如玉米（Zea mays L.），其中选定的植物可以很容易地杂交，以获得大量种子用于下一个选择周期。在这里，我描述和目前的全基因组选择程序，需要最小的自花授粉作物杂交的模拟结果。该程序被称为GWS（Self），包括在循环0中从所选择的后代中的杂交中仅产生几个F（1）种子，允许F（1）种子自然自花授粉以产生F（2）种子，在所得F（2）植物中进行基于标记的选择，并在全年苗圃或温室中重复该选择-重组-自我程序。以大麦（Hordeum vulgare L.）作为模式物种，我从模拟实验中发现，如果使用适合于玉米的全基因组选择程序，GWS（Self）的选择反应是获得的反应的81%至87%。这些较低的反应可以通过更严格的选择来补偿。
Genomewide selection in plants has focused on cross-pollinated species, such as maize (Zea mays L.), in which selected plants can be easily crossed to obtain a large number of seeds for the next cycle of selection. Here I describe and present simulation results for a genomewide selection procedure that requires minimal crossing in self-pollinated crops. This procedure, referred to as GWS(Self), involves producing only a few F(1) seeds from crosses among the selected progenies in Cycle 0, allowing the F(1) seeds to naturally self-pollinate to produce F(2) seeds, conducting marker-based selection among the resulting F(2) plants, and repeating this select-recombine-self procedure in a year-round nursery or greenhouse. With barley (Hordeum vulgare L.) as a model species, I found from simulation experiments that selection responses with GWS(Self) were 81 to 87% of the responses obtained if genomewide selection procedures appropriate for maize were used. These lower responses can be compensated for by more stringent selection.