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首页> 外文期刊>european journal of phycology >Variation in the sexual behaviour ofAchnanthes longipes(Bacillariophyta). III. Progeny of crosses between monoecious and unisexual clones
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Variation in the sexual behaviour ofAchnanthes longipes(Bacillariophyta). III. Progeny of crosses between monoecious and unisexual clones

机译：Achnanthes longipes（Bacillariophyta）性行为的变异。III. 雌雄同株和单性克隆杂交的后代

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The allogamous raphid diatomAchnanthes longipesC. A. Agardh possesses a complex breeding system involving interactions between three types of clone: monoecious, unisexual and bisexual. Previous studies showed that these three types can be crossed with each other, with a tendency for sexual characteristics to be inherited: inbred monoecious lineages gave rise to monoecious or, very rarely, to bisexual clones, while inbred unisexual lineages yielded unisexual and bisexual clones. The current paper reports on the progeny of crosses between monoecious and unisexual clones and their inbred offspring. All three types of clone appeared in the F1and F2, although unisexual clones of opposite sex to the parental clone were not found. Inbreeding depression was observed and also a tendency for #x2018;normal#x2019; auxosporulation (producing two auxospores per pair of gametangia) to be replaced by #x2018;reduced#x2019; or #x2018;intermediate#x2019; auxosporulation (producing one auxospore per pair). In addition, patterns of incompatibility were observed that were not seen during earlier studies of clones isolated directly from nature. These included the inability of some F1clones to mate with each other, in spite of compatibility with all other clones examined (unisexual, bisexual and monoecious).
机译：同种异体 raphid 硅藻Achnanthes longipesC.A. Agardh 拥有复杂的繁殖系统，涉及三种克隆之间的相互作用：雌雄同株、单性和双性。先前的研究表明，这三种类型可以相互杂交，具有遗传性特征的趋势：近交的雌雄同株谱系产生了雌雄同株的，或者很少产生双性克隆，而近交的单性谱系产生了单性克隆和双性克隆。目前的论文报道了雌雄同株和单性克隆与其近交后代之间的杂交后代。所有三种类型的克隆都出现在F1和F2中，尽管没有发现与亲本克隆相反的单性克隆。观察到近亲繁殖抑制，并且“正常”辅助孢子形成（每对配子产生两个辅助孢子）被“减少”或“中等”辅助孢子形成（每对产生一个辅助孢子）所取代。此外，还观察到了在早期直接从自然界中分离出的克隆研究中未见的不相容性模式。这些包括一些F1克隆无法相互交配，尽管与所有其他被检查的克隆（单性、双性和雌雄同株）兼容。

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