Agricultural Research Service, United States Department of Agriculture, Lubbock, Texas 79401.
Plant Physiol. 1977 Mar;59(3):354-6. doi: 10.1104/pp.59.3.354.
Two parental lines of Upland cotton (Gossypium hirsutum L.) plus their reciprocal F(1), F(2), and backcross populations were field-tested for environmental and genetic components of leaf diffusive resistance. Leaf resistance was measured with a diffusion porometer three times each day during 6 days in August. A large, consistent environmental component was present during the morning, afternoon, and evening, but the genetic component appeared mainly during the afternoon. Leaf water potential indicated that afternoon was the period of highest water stress. Genetic analyses revealed that leaf resistance was associated with both additive and dominance genetic variances, with an estimated narrow sense heritability of 25%. High leaf resistance was completely dominant to low resistance.
两个陆地棉亲本系（Gossypium hirsutum L.）及其正反交 F1、F2 和回交群体在田间进行了叶扩散阻力的环境和遗传成分的测试。在 8 月的 6 天内，每天三次使用扩散式透气仪测量叶片阻力。在早晨、下午和晚上都存在较大的、一致的环境成分，但遗传成分主要出现在下午。叶片水势表明下午是水分胁迫最高的时期。遗传分析表明，叶片阻力与加性和显性遗传方差有关，估计狭义遗传率为 25%。高叶片阻力对低阻力完全显性。
