我国新疆和湖南棉铃虫种群的遗传学研究

采自湖南衡阳(HY)和新疆哈密(HM)的棉铃虫Helicoverpa armigera(Hubner)种群被室内杂交和回交，杂交F₁代和回交F₂代雌成虫的产卵量、卵孵化率和产卵时间等繁殖力参数均无明显的变化。在22℃下，HM、HY、HM♀×HY♂、HY♀×HM♂和(HY♀×HM♂)×HY♂后代蛹滞育的临界光周期分别为13h 35 min，11 h，11 h 45 min，11 h 43min和11 h9min。在一15℃下，HM、HY、HM♀×HY♂、HY♀×HM♂、HY♀×(HY♀×HM♂)♂和(HY♀×HM♂)♀×HM♂后代滞育蛹的致死中时间(LT”)分别是159.7h、34.27h、100.65 h、116.75h、90.78h和135.58h，亲本F₁代显性度D(HM♀×HY♂)和D(HY♀XHM♂)分别为0.3998和0.5926。遗传分析表明棉铃虫滞育蛹的抗寒性由多个不完全显性的基因控制。

INHERITANCE EXPERIMENT OF COTTON BOLLWORM POPULATIONS FROM XINJANG UYGUR AUTONOMOUS REGION AND HUNAN PROVINCE IN CHINA

The populations of cotton bollworm, Helicoverpa arrnigera (Hubner), collected from Hami (HM), Xinjiang Uygur Autonomous Region and Hengyang (HY),Hunan Province in China, were crossed and backcrossed in the laboratory. The results showed that there was no significant difference in reproduction, hatching rate of eggsand reproductive duration between the F_l and F₂ moths of the two populations. The critical photoperiods for pupal diapause of HM, HY, HM♀× HY♂, HY♀×HM♂and (HY♀×HM♂)♀×HY♂ strains at 22℃ were 13 h 35 min, 11 h, 11 h 45 min, 11 h43 min and 11 h 9 min, respectively. The LT₅₀ values of diapause pupae of HM, HY,HM♀×HY♂ , HY♀×HM♂ ,HY♀×(HY♀×HM♂) ♂and (HY♀×HM♂)♀×HM ♂ at -15℃ were 159.74 h, 34. 2696 h, 100.65 h, 116. 75 h, 90.78 h and 135.58h, respectively, and the dominance degrees ID (HM♀×HY♂) and D (HY♀×HM♂)] were estimated to be 0.3998 and 0.5926. It indicated that the inheritance of cold hardiness in cotton hollworm is irrelevant to sex and controlled by multiple factors.