Comparative analysis of performance and stability among composite cross populations, variety mixtures and pure lines of winter wheat in organic and conventional cropping systems
Comparative analysis of performance and stability among composite cross populations, variety mixtures and pure lines of winter wheat in organic and conventional cropping systems
复制标题
DOI：
10.1016/j.fcr.2015.08.009
复制
发表时间：
2015-11-01
影响因子：
5.8
通讯作者：
Wolfe, Martin S.
中科院分区：
文献类型：
--
作者：
Doering, Thomas F.;Annicchiarico, Paolo;Wolfe, Martin S.
本研究探讨了不同种植环境下，基因型间杂交和品系间物理混合所引起的冬小麦遗传多样性增加对产量、品质和产量稳定性的影响。组的纯系（无多样性），选择高产能力或高品质，进行了比较与线混合物（中间水平的多样性），和线与彼此在复合杂交群体（CCPn，高多样性）。还测试了含有雄性不育基因（CCPms）以提高异交率的其他种群。谷物产量，谷物蛋白质含量和蛋白质产量进行了测量，在四个地点（两个有机管理和两个传统管理）在三年内，使用种子收获当地在每一个前一年。CCPn和混合物分别比亲本平均值高出2.4%和3.6%。这些产量差异是一致的遗传背景，但部分不一致的种植环境和年。CCPn和CCPms的产量稳定性高于双亲的平均值。CCPn、CCPms和混配组合的产量可靠性指数均高于双亲的平均值。Lin和Binns的产量和蛋白质产量的优势值在CCP中始终显著低于（即优于）亲本的平均值，但在CCP和混合物之间没有差异。然而，CCP表现出更大的早期地面覆盖和植物高度比混合物。与（当地不可预测的）最佳产量纯系相比，CCP和混合物表现出较低的平均产量和较低的产量可靠性，但可比的优势值。因此，从较小的高性能亲本系建立CCP可能会优化其产量能力。总体而言，结果表明，利用作物内遗传多样性增加可以生产出在可变和不可预测的种植环境中具有提高的产量稳定性和良好的产量可靠性的小麦作物。(C)2015爱思唯尔B.V.保留所有权利。
This study investigated the effects of increased genetic diversity in winter wheat (Triticum aestivum L), either from hybridization across genotypes or from physical mixing of lines, on grain yield, grain quality, and yield stability in different cropping environments. Sets of pure lines (no diversity), chosen for high yielding ability or high quality, were compared with line mixtures (intermediate level of diversity), and lines crossed with each other in composite cross populations (CCPn, high diversity). Additional populations containing male sterility genes (CCPms) to increase outcrossing rates were also tested. Grain yield, grain protein content, and protein yield were measured at four sites (two organically-managed and two conventionally-managed) over three years, using seed harvested locally in each preceding year. CCPn and mixtures out-yielded the mean of the parents by 2.4% and 3.6%, respectively. These yield differences were consistent across genetic backgrounds but partly inconsistent across cropping environments and years. Yield stability measured by environmental variance was higher in CCPn and CCPms than the mean of the parents. An index of yield reliability tended to be higher in CCPn, CCPms, and mixtures than the mean of the parents. Lin and Binns' superiority values of yield and protein yield were consistently and significantly lower (i.e. better) in the CCPs than in the mean of the parents, but not different between CCPs and mixtures. However, CCPs showed greater early ground cover and plant height than mixtures. When compared with the (locally non-predictable) best-yielding pure line, CCPs and mixtures exhibited lower mean yield and somewhat lower yield reliability but comparable superiority values. Thus, establishing CCPs from smaller sets of high-performing parent lines might optimize their yielding ability. On the whole, the results demonstrate that using increased within-crop genetic diversity can produce wheat crops with improved yield stability and good yield reliability across variable and unpredictable cropping environments. (C) 2015 Elsevier B.V. All rights reserved.