大猿叶虫体重的地理[new]...docVIP

大猿叶虫 （江西农业大学昆虫研究所, 南昌 330045） 摘要：我们自江西龙南（24°9′ N, 114°8′ E）、江西修水（29°1′ N, 114°4′ E）、山东泰安（36°2′ N, 117°1′ E）和哈尔滨（45°8′ N, 126°6′ E）四个大猿叶虫地理种群雌雄成虫的体重。结果表大猿叶虫雌虫的体重显著体重随纬度的升高而显著减小。随着体重增加，性二型性（Sexual dimorphism）减小的现象（任希法则）在该中得到证明，在雌虫体型较的种群中，雄虫体重比雌虫体重增长幅度相对较大。杂交后代的体重位于两亲本之间并倾向母本，体重的。 exual size dimorphism and body weight of the cabbage beetle Colaphellus bowringi KUANG Xian-Ju, XU Jing, HUANG Fang, XIA Qin-Wen, XUE Fang-Sen*(Institute of Entomology, Jiangxi Agricultural University, Nanchang 330045, china) Abstract: To ascertain the sexual size dimorphism and geographical variation in body size of the cabbage beetle Colaphellus bowringi Baly, we investigated the body weight from four different latitudes (24°9′ N, 114°8′ E, 29°1′ N, 114°4′ E, 36°2′ N, 117°1′ E, 45°8′ N, 126°6′ E). The results showed that the body weight is different between the females and males and females are significantly greater than males. The body weights of both female and male were gradually decreased with an increase in latitudes. Rensch’s rule that sexual size dimorphism (SSD) decreases as body size increases is supported, with males growing relatively larger compared to females in populations with larger body sizes. The body weight of hybrid descendant of different geographical population was always intermediate to that of their parents and more close to their mother, suggesting that the traits of body weight are inherited polygenically. Key words: Colaphellus bowringi; body weight; geographical variation; sexual size dimorphism; rensch’s rule; hybrid descendant 体型是动物最明显的特征之一，它会影响生物几乎所有的其他学特性，比如，竞争，迁飞能力，寿命，后代的体型，数量(Peters 1983, Stearns 1992, Honek 1993, Roff 2002)等。动物中体型的变异非常普遍，种群间成熟个体的体型通常表现出明显的差异(Atkinson 1994)，这些差异是动物适应当地不同的环境条件的结果。动物种群间的体型会随地理纬度发生变化，如体型随纬度增大而增大，称为贝格曼法则（Bergmann’s rule（Bergmann 1847Blanckenhorn Demont 2004）(Converse Bergemann’s rule) （Masaki 1967, Mousseau Roff 1989, Blanckenhorn Fairbairn 1995, Blanckenhorn Hellriegel 2002)，并且拥有不同的内在机制(Blanckenhorn Demont 2004)。 雌性动物与雄