RECURRENT SELECTION IN SOYBEANS .2. SELECTION FOR INCREASED PERCENT PROTEIN IN SEEDS
RECURRENT SELECTION IN SOYBEANS .2. SELECTION FOR INCREASED PERCENT PROTEIN IN SEEDS
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DOI：
10.2135/cropsci1979.0011183x001900040016x
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发表时间：
1979-01-01
期刊：
影响因子：
2.3
通讯作者：
BURTON, JW
中科院分区：
文献类型：
--
作者：
BRIM, CA;BURTON, JW
对2个大豆品种进行了提高籽粒蛋白质含量的轮回选择。max（L.）梅里尔）的人口，以测试效用的选择程序。群体I来自2个高度适应的实验品系的杂交。群体II由9个具有高百分比种子蛋白的不适应植物引入高度适应的实验系的回交产生。将每个群体细分为A和B群体。群体IA和IIA的有效群体大小为比IB和IIB大3倍。一个周期的选择包括使选择的品系相互交配，测试来自交配的S1品系，并选择具有最高百分比种子蛋白的那些作为下一个周期的亲本。在重复的田间试验中，使用从每个周期的测试世代中选择的亲本的复合群体作为条目来评估选择进展。种子蛋白质含量在所有群体中均呈显著线性增加。在群体IA中，用6个选择周期将种子蛋白质从46.3%增加到48.4%，在群体IB中，用4个选择周期将种子蛋白质从46.4%增加到47.6%。在群体IIA中，5个周期的选择使蛋白质从42.8%增加到46.1%，在群体IIB中，4个周期的选择使蛋白质从43.2%增加到45.9%。在两个群体IIA和IIB的最后一个周期的产量显着低于C0，但单位面积产生的总蛋白质的变化是不显着的。在群体IA中，从C0到C6，产量和总蛋白质产量都显着增加。在群体IB中，从C0到C4的产量或总蛋白没有显著变化。尽管种子油百分比呈显著线性下降，但仅在种群IIA和IIB中单位面积的总油产量显著下降。结果表明，大豆蛋白质轮回选择可取得显著进展。减少有效群体大小和每周期测试的品系数量对进展几乎没有影响。
Recurrent selection for increased percent protein in seeds was conducted in 2 soybean (G. max (L.) Merrill) populations to test the utility of the selection procedure. Population I was derived from a cross of 2 highly adapted experimental lines. Population II was generated from backcrosses of 9 unadapted plant introductions with high percent seed protein to a highly adapted experimental line. Each population was subdivided into an A and B population. The effective population size of populations IA and IIA was .apprx. 3 times larger than IB and IIB. A cycle of selection involved intermating selected lines, testing S1 lines from the matings and selecting those with highest percent seed protein as parents for the next cycle. Selection progress was evaluated in replicated field trials using composite populations of the parents chosen from the testing generation in each cycle as entries. Percent seed protein significantly increased and linearly in all populations. Seed protein increased from 46.3 to 48.4% with 6 cycles of selection in population IA and from 46.4 to 47.6% with 4 cycles in population IB. In population IIA, protein increased from 42.8 to 46.1% with 5 cycles and from 43.2 to 45.9% with 4 cycles of selection in population IIB. Yield of the last cycle in both populations IIA and IIB was significantly lower than that for C0, yet the change in total protein produced per unit area was nonsignificant. In population IA both yield and total protein produced increased significantly from C0 to C6. There was no significant change from C0 to C4 for yield or total protein in population IB. Despite the significant linear decrease in percent seed oil, the total oil produced per unit area decreased significantly in populations IIA and IIB only. The results show that significant progress can be obtained from recurrent selection for protein in soybeans. Reduced effective population size and numbers of lines tested per cycle had little effect on progress.