论文部分内容阅读
家蚕的杂交育种或基础品种选育,除需要正确地选择亲本外,还必须对其后代有恰当的选择方法,才能不断地提高家蚕的各种经济性状的选择效果。本试验用已育成的原种,采用不停食的饲养方法,选择发育慢和发育快的类型,考察其后代的遗传变化。另外还对19个杂种的F_1—F_5之间茧质的相关性进行了分析。一、材料和方法 (一)用“683”、“东34”系、“苏蚕一”、广蚕二”、“广蚕三”原种为材料,于1983年6月在自然温度、湿度的条件下,每天
Silkworm hybrid breeding or breeding of basic varieties, in addition to the correct choice of parents, but also must have the appropriate choice of their offspring methods in order to continuously improve the selection of various economic traits silkworm effect. This experiment has been bred of the original species, using non-stop feeding methods, choose the type of slow development and rapid development, examine the genetic changes of their offspring. In addition, the correlations of cortices between F_1-F_5 of 19 hybrids were also analyzed. I. MATERIALS AND METHODS (I) Materials from “683”, “East 34”, “Jiangsu Silkworm One”, “Broad Silkworm II” and “Broad Silkworm Three” were used as materials in June 1983 at natural temperature and humidity The conditions, every day