在寄生虫黄蜂Nasonia vitripennis中的哈普洛伊德雌性

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Leo W Beukeboom¹, Albert Kamping, Marina Louter

¹Evolutionary Genetics, Centre for Ecological and Evolutionary Studies, University of Groningen, Post Office Box 14, 9750 AA Haren, Netherlands. l.w.beukeboom@rug.nl

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|January 16, 2007

概括

海门虫通常从受精的双胞胎卵中发展出雌性. 然而,这项研究发现,在Nasonia vitripennis中,从未受精的卵子中发育的平分体雌性,挑战了已建立的平分体规则.

科学领域:

昆虫学昆虫学是一门学科.
遗传学遗传学是一个
发展生物学发展生物学

背景情况:

类动物,包括,蜜蜂和黄蜂,主要是平分类动物.
双胞胎性意味着雄性从未受精的双胞胎卵中发展,而雌性来自受精的双胞胎卵.
虽然已知双胞胎雄性,但从未观察到双胞胎雌性.

研究的目的:

为了研究寄生虫黄蜂Nasonia vitripennis中的女性形态.
为了确定发育途径,以确定海门的性别.
挑战女性发育所需的双体质的必要性.

主要方法:

对一种特殊的遗传线的分析 Nasonia vitripennis 展现出不寻常的性别决定.
细胞学检查以确定染色体数.
流细胞计测量以评估性水平.

主要成果:

鉴定了一种纳索尼亚维特里佩尼斯 (Nasonia vitripennis) 菌株,该菌株从未受精的卵子中产生完整的表型雌性.
这些雌性通过细胞学和流动细胞计分析证实是平分体的.
这项研究表明,双质性对该物种的雌性发育并不重要.

结论:

这一发现挑战了长期以来对白类动物中"平分类"的理解.
哈普洛伊德雌性可以发育,并且具有繁殖能力,拥有卵巢和产卵.
这项研究为了解昆虫的性别决定机制开辟了新的途径.

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