[ Objective] The aim was to introduce the breeding process of natural colorful cocoon silkworm variety, Chuancan No. 24. [ Method] By cross breeding and pedigree separation, the silkworm variety, Chuancan No. 24, with...[ Objective] The aim was to introduce the breeding process of natural colorful cocoon silkworm variety, Chuancan No. 24. [ Method] By cross breeding and pedigree separation, the silkworm variety, Chuancan No. 24, with double sex-limited markings and strong vitality and for sum- mer-Autumn rearing was bred. [ Result] The results of laboratory identification and countryside test in Sichuan Province indicated that the Chuancan No. 24 was strong and could be reared easily. They had uniform development and excellent quality of cocoon and silk. In addition, their sexes could be identified by larval body color and markings. The main indexes are as follows： cocoon yield per 10 003 fourth instar larvae, 19.66 kg; filament length, 1 241.29 m; length of non-broken filament, 941.99 mm; reelability, 75.87% ; raw silk ratio of fresh cocoon, 17.07% ; and neatness, 94.03 points. The main economic features of new variety were better than those of the control. [ Conclusion] The Chuancan No. 24 has been approved by the Sichuan Silkworm Evaluation Commission, and it is suitable to rear this new variety in some regions of the Yangtze River drainage basin, such as Sichuan Province and Chongqing.展开更多
Chuanshan × Shushui is a highgrade cocoon filament silkworm variety for spring and autumn rearing bred by Nanchong Silkworm Eggs Farmthrough systematic breeding method. The characteristics of stock seed and F1 hy...Chuanshan × Shushui is a highgrade cocoon filament silkworm variety for spring and autumn rearing bred by Nanchong Silkworm Eggs Farmthrough systematic breeding method. The characteristics of stock seed and F1 hybrid of silkworm variety Chuanshan × Shushui and their breeding technical points and precautions were introduced in the paper. Laboratory identification and rural breeding results showed that Chuanshan × Shushui wascharacterized by physical strength, high cocoon weight, good cocoon quality and superior neatness, and the cocoons produced could reel 5A6A classraw silk. The variety was suitable for breeding in silkworm areas in Sichuan, Yunnan and Shaanxi provinces. The variety was approved by Sichuansilkworm breeding committee in 2005, and more than one million boxes of silkworm eggs have been cumulatively bred in silkworm areas in Sichuan,Yunnan, Shaanxi and Hainan provinces.展开更多
基金funded by the Agricultural Science and Technology Achievements Transformation Fund Programs (2010GB2F000412)
文摘[ Objective] The aim was to introduce the breeding process of natural colorful cocoon silkworm variety, Chuancan No. 24. [ Method] By cross breeding and pedigree separation, the silkworm variety, Chuancan No. 24, with double sex-limited markings and strong vitality and for sum- mer-Autumn rearing was bred. [ Result] The results of laboratory identification and countryside test in Sichuan Province indicated that the Chuancan No. 24 was strong and could be reared easily. They had uniform development and excellent quality of cocoon and silk. In addition, their sexes could be identified by larval body color and markings. The main indexes are as follows： cocoon yield per 10 003 fourth instar larvae, 19.66 kg; filament length, 1 241.29 m; length of non-broken filament, 941.99 mm; reelability, 75.87% ; raw silk ratio of fresh cocoon, 17.07% ; and neatness, 94.03 points. The main economic features of new variety were better than those of the control. [ Conclusion] The Chuancan No. 24 has been approved by the Sichuan Silkworm Evaluation Commission, and it is suitable to rear this new variety in some regions of the Yangtze River drainage basin, such as Sichuan Province and Chongqing.
文摘Chuanshan × Shushui is a highgrade cocoon filament silkworm variety for spring and autumn rearing bred by Nanchong Silkworm Eggs Farmthrough systematic breeding method. The characteristics of stock seed and F1 hybrid of silkworm variety Chuanshan × Shushui and their breeding technical points and precautions were introduced in the paper. Laboratory identification and rural breeding results showed that Chuanshan × Shushui wascharacterized by physical strength, high cocoon weight, good cocoon quality and superior neatness, and the cocoons produced could reel 5A6A classraw silk. The variety was suitable for breeding in silkworm areas in Sichuan, Yunnan and Shaanxi provinces. The variety was approved by Sichuansilkworm breeding committee in 2005, and more than one million boxes of silkworm eggs have been cumulatively bred in silkworm areas in Sichuan,Yunnan, Shaanxi and Hainan provinces.
