High Temperature Tolerance and Inheritance of Tussah Silkmoth Embryos
To explore the tolerance of tussah silkmoth(Antheraea pernyi)embryos to high temperature and its genetic patterns,the fertilized eggs of tussah silkmoth were subjected to high temperature above 43℃.There were significant differences in the effects of high temperature on embryos in different developmental stages,with the weakest at the effective accumulated temperature of 5-10℃and the strongest at 20℃.Different high temperatures showed significant impacts on embryos.As the temperature increases,the tolerance of embryos decreases and the hatching rate decreases.High temperature stress can also prolong the developmental period of embryos and have a significant impact on the uniformity of hatching,prolonging hatching time and reducing daily hatching rates.There were significant differences in tolerance to high temperature stress among different varieties,with Liaocan 527 having the strongest tolerance to high temperature stress and Xiaobaican having the weakest tolerance;The results of genetic research showed that the tolerance of tussah silkworm embryos to high temperature stress was controlled by four major genes,with significant major gene effects and a heritability rate of 91.97%.However,the influence of minor polygenes on it was relatively small,with a heritability rate of only 5.77%.In summary,early selection of hybrid offspring embryos for tolerance to high temperature stress can lead to the breeding of oak silkworm varieties with strong tolerance to high temperature stress.
tussah silkmothegg embryohigh temperature stresstoleranceheredity
万方数据
维普
