家蚕丝质性状选择效果研究

本文采用系统选择、杂交改良等方法。对解舒、净度、强伸力、茧丝长等家蚕主要丝质性状进行了研究。结果表明,解舒、净度、茧丝长系统选择与杂交改良是有效的;对解舒率和茧丝长进行严格综合系统选择,在一定程度上能克服解舒率与茧丝长的负相关关系;系统选择法所建立的解舒好系与解舒差系能稳定遗传;解舒率与强力、伸长度成正相关,但相关程度很低,一代杂种的强力高于原种。

STUDIES ON THE EFFICIENCY OF SELECTION FOR IMPROVING TECHNOLOGICAL CHARACTERS OF COCOON FILAMENT OF BOMBYX MORI L.

Studies were made on the main technological characters of cocoon filament of Bombyx mori. The results are as follows: (1) strain selection and hybreeding method effectively improved the reelability, neatness,and length of floretta; (2)strictly intergrated strain selection for reelability percentage and length of floretta reduced to some degree the negative relationship between reelability percentage and length of floretta; (3) both the good reelability strains and the poor ones dirived from the same parents by the strain selection showed a stable genetic feature; (4) a positive relationship was detected between the reelability and the tenacity and elongation, which was relatively weak. The tenacity of F1 hybrids was higher than that of the parental ones.