Institute for Resistance Genetics Grünbach, Graf-Seinsheim-Straße 23, D-8059, Bockhorn, FRG.
Theor Appl Genet. 1988 Oct;76(4):560-4. doi: 10.1007/BF00260908.
Three rye populations originating from different cultivars were subjected to half sib progeny selection for three cycles to improve their resistance to powdery mildew (Erysiphe graminis DC. f.sp. secalis Marchal). Selection was carried out in the greenhouse (measurement of spore production at the three-leaf stage), in the field (scoring of mildew infections at ear emergence) or at both locations. All selections resulted in significant responses, the level of which varied depending on the genetic base of mildew resistance in the populations. Greenhouse selection was most effective when the frequency of dominant genes could be increased, whereas field selection was less effective. Estimates for heritability in the narrow sense ranged from 0.42-0.94 indicating that mildew resistance can be increased effectively. Inbred lines should be selected in base populations with a high level of quantitative resistance and/or a high frequency of dominant genes. For an effective resistance strategy in hybrid breeding such dominant genes are most valuable, and can be selected in young growth stages. In 'Strain CG' the increase of dominant resistance genes by early selection resulted in a significant improvement of kernel yield.
三个来自不同品种的黑麦群体经历了三个半同胞后代选择周期，以提高其对白粉病（禾布氏白粉菌）的抗性。选择在温室（三叶期测量孢子产量）、田间（穗出时白粉病感染评分）或两者同时进行。所有选择都产生了显著的反应，其水平取决于群体中白粉病抗性的遗传基础。当能够增加显性基因的频率时，温室选择最有效，而田间选择效果较差。狭义遗传力估计值在 0.42-0.94 之间，表明可以有效地提高白粉病抗性。在具有高水平数量抗性和/或显性基因高频率的基础群体中应选择自交系。对于杂种育种中的有效抗性策略，这种显性基因最有价值，可以在幼苗生长阶段进行选择。在“CG 品系”中，早期选择增加显性抗性基因，显著提高了籽粒产量。
