家蚕若干品种资源茧丝质性状调查与浅析

对陕西蚕桑丝绸所保育的７２个家蚕品种的丝质性状调查表明，粒茧丝长中系〉日系〉欧系〉地方品种，其平均丝长９５４ｍ，最长１２５３ｍ，最短４３９ｍ；平均解舒丝长５８５ｍ，最长８７１ｍ，最短２２９ｍ，解舒率平均值为６１．２％，解舒率欧系〉地方品种〉日系〉中系。

Investigation and Analysis of Silkworm(Bombyx mori L.) Races Resources in Shaanxi

For length of silk,the average is 954 m,the longest is 1 253 m,the shortest is 439 m and Chinese races>Japanese races>Europen races>Shaanxi local races;for length of non-broken cocoon filament,the average is 585 m,the longest is 871 m,the shortest is 229 m;for relability percentage,the average is 61.2%,the best is 83.8%,the worst is 30.6% and Europenraces> Shaanxi local races>Japanese races>Chinese races.A bove results came from 72 varieties investigated in Shaanxi.For 71 varieties,the average weight of cocoon filament is 0.249 g,the heaviest is 0.316 g,the lightest is 0.107g,Chinese races>Japanese races>Europen races>Shaanxi local races;the average cocoon filament size is 2.359 D,the coarse size is 3.065 D,the fine size is 1.790 D,Japanese races>Chinese races>Europen races>Shaanxi local races.The average neatness is 93.9 point,the best is 97 fen,the worst is 87.5 fen and Japanese races>Chinese races>Europen races.