桑树远缘杂交选育材料的叶质饲蚕鉴定

目的]考察远缘杂交选育材料远杂1号、远杂2号和远杂3号的桑叶饲蚕成绩。方法]采用桑叶饲蚕鉴定法分析远杂1号、远杂2号和远杂3号饲蚕的大蚕期发病率、饲蚕产量和质量。结果]远杂1号、远杂2号和远杂3号的4龄起蚕结茧率分别为98.99%、97.96%和97.94%;全茧量分别为2.25、2.17和2.10 g;茧层率分别为23.11%、23.96%和23.81%。万蚕收茧量分别为22.07、20.12和20.96 kg;万蚕茧层量分别为5.59、5.10和5.27 kg;壮蚕100 kg叶产茧量分别为6.32、5.75和6.10 kg。结论]桑树远缘杂交选育材料远杂1号、远杂2号和远杂3号表现出比对照湖桑32号更优的茧质成绩和更高的产茧量,是优异的桑树品种选育材料。

Quality Evaluation of Leaves of Mulberry Materials Bred through Distant Hybridization by Rearing of Silkworms

Objective] To study silkworms reared with leaves of mulberry materials bred through distant hybridization including Yuanza No.1, Yuanza No.2, and Yuanza No.3.Method] The incidence rate of silkworms reared with leaves of Yuanza No.1, Yuanza No.2, and Yuanza No.3 at the later larval stage and the yield and quality of produced cocoon were analyzed. Result] The cocooning rate of Yuanza No.1, Yuanza No.2, and Yuanza No.3 over the age of 4 was 98.99%, 97.96% and 97.94% respectively;the cocoon weight was 2.25, 2.17 and 2.10 g respectively; the cocoon layer ratio was 23.11%, 23.96% and 23.81% respectively.The yield of cocoon produced by ten thousand silkworms was 22.07, 20.12 and 20.96 kg respectively; the weight of cocoon layer produced by ten thousand silkworms was 5.59, 5.10 and 5.27 kg; the yield of cocoon produced by grown silkworms reared with 100 kg of mulberry leaves was 6.32, 5.75 and 6.10 kg respectively. Conclusion] Seen from the quantity and quality of cocoon, Yuanza No.1, Yuanza No.2, and Yuanza No.3 are superior to the control Husang No.32, so they are good materials used to breed mulberry.