ALL FEMALE BROODS IN BUTTERFLY HYPOLIMNAS-BOLINA (L)
ALL FEMALE BROODS IN BUTTERFLY HYPOLIMNAS-BOLINA (L)
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DOI：
10.1098/rspb.1975.0038
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发表时间：
1975-01-01
期刊：
影响因子：
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通讯作者：
SCALI, V
中科院分区：
文献类型：
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作者：
CLARKE, C;SHEPPARD, PM;SCALI, V
自1924年以来，人们就知道蝴蝶中有一定比例的雌性蝴蝶。博利纳人只生女儿，而其他人的性别比例是1：1。目前的结果证实了这一点，也表明偶尔会产生一些雄性。性比失调的后代的生产完全是通过雌性品系遗传的。通过对胚胎和幼虫进行细胞学性别鉴定，并观察胚胎和幼虫后期的死亡率，我们得到了雄虫缺乏的证据是由于它们在成虫前期的死亡率很高。与Y染色体减数分裂驱动的假设相反，异常的性别比是由于感染的细胞质因素(如果蝇中的螺旋藻的存在已被排除)所致。提出了基因的多态现象在生物多样性上的观点。博利纳伊蚊是由处于轻微劣势的“受感染”雌性维持的，它们的数量是由一种身份不明的宿主物种的传染维持的。
It has been known since 1924 that a proportion of females in the butterflyH. bolinaproduce only daughters, whereas others produce a 1:1 sex ratio. The present results confirm this, and show also that occasionally a few males are produced. The production of broods with a disturbed sex ratio is inherited entirely through the female line. By sexing the embryos and larvae cytologically and observing mortality in the embryos and late pupal stage we have obtained evidence that the deficiency of males is due to their very high mortality in the pre-adult stage. It is suggested that the abnormal sex ratio is due to an infective cytoplasmic factor (the presence of spirochaetes, as inDrosophila, having been ruled out), in contrast toAcraea encedonwhere meiotic drive of the Y chromosome has been postulated. The view is put forward that the polymorphism inH. bolinais maintained by the ‘infected’ females being at a slight disadvantage and that their numbers are maintained by contagion from an unidentified reservoir species.