龙蝇科(双翅目)精子和精囊的共同进化

IF 1.7 3区 农林科学 Q2 ENTOMOLOGY
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引用次数: 0

摘要

矛翅蝇(双翅目:龙蝶科)的雌性生殖道,尤其是精巢的大小差异显著。矛翅蝇科有两个管状精巢,在形态学和组织学上分为四个不同的部分,长度和功能也各不相同。我们研究了 11 个龙蝶科物种的精巢及其各个部分的尺寸,并将其与各自精子的尺寸联系起来。通过连续切片进行三维重建,可以将体积纳入考虑范围,这在这方面是一种新方法。结果表明,精囊总是比相应的精子长。精子的长度与精囊的总长度以及部分精囊切片的长度之间存在非常明显的正线性相关,这表明这些特征是共同进化的。此外,在精子较长、体积较大的物种中,精囊的体积要大得多,但体积的增加不足以使精囊内的精子数量保持不变。本文讨论了观察到的模式对功能和进化的影响,包括关于精子长度增加可能带来的选择性优势的新假设。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Coevolution of spermatozoa and spermathecae in Lonchopteridae (Diptera)

Coevolution of spermatozoa and spermathecae in Lonchopteridae (Diptera)

Across the species of spear-winged flies (Diptera: Lonchopteridae) there is a remarkable variation in size of the female reproductive tract, especially of the spermathecae. In this family there are two tubular spermathecae, which are divided into four morphologically and histologically distinct sections of different lengths and functions. The dimensions of the spermathecae and their individual sections were examined across 11 Lonchoptera species and related to the dimensions of the respective spermatozoa. 3D reconstructions from serial sectioning made it possible to include the volume in these considerations, which is a new approach in this context. Results show that the spermathecae are always longer than the respective spermatozoa. There is a highly significant positive linear correlation between the length of the spermatozoa and the length of the spermathecae in total as well as some of the individual spermathecal sections, suggesting a coevolution of these characters. Moreover, the volume of the spermathecae is much larger in those species with longer and more voluminous spermatozoa, but the volume increase is not sufficient to keep constant the number of spermatozoa that fit within. The observed patterns are discussed with respect to their functional and evolutionary implications, including a new hypothesis on the possible selective advantage of increased spermatozoon length.

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来源期刊
CiteScore
3.50
自引率
10.00%
发文量
54
审稿时长
60 days
期刊介绍: Arthropod Structure & Development is a Journal of Arthropod Structural Biology, Development, and Functional Morphology; it considers manuscripts that deal with micro- and neuroanatomy, development, biomechanics, organogenesis in particular under comparative and evolutionary aspects but not merely taxonomic papers. The aim of the journal is to publish papers in the areas of functional and comparative anatomy and development, with an emphasis on the role of cellular organization in organ function. The journal will also publish papers on organogenisis, embryonic and postembryonic development, and organ or tissue regeneration and repair. Manuscripts dealing with comparative and evolutionary aspects of microanatomy and development are encouraged.
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