陆地棉茸毛与抗棉蚜性关系的研究

RESEARCH ON THE RELATIONSHIP BETWEEN HAIRINESS AND APHID RESISTANCE IN GOSSYPIUM HIRSUTUM L.

This research deals with hair characters of 11 upland cotton strains which possess different aphid resistance, and with the relationship between them. Genetic effects of multiple hair density on main veins of leaves are also studied by analyzing 6 population generations. Results showed that the distribution characters of hair density on cotton plants are the yong stems>mainveins>sub-veins, of leaves. The back-side hairs grow on epidemics of vascular bundles. The number of multiple hairs exceeds single ones. The hair density on yong organs is greater. There is a highly significant relationship between the hair density on the main veins and aphid resistance, and a significant relationship of hair density of sub-veins and yong stems with aphid resistance. Multiple hairs play a major role in aphid action limits. Hair straightness also has effects on aphid resistance. Multiple hair genetics on sub-veins confirms to additive-dominant model.