Sexual allocation in hermaphroditic plants

雌雄同体植物的性别分配

• 批准号: 09640742
• 负责人: SAKAI Satoki
• 金额: $ 1.98万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640742/
• 关键词: sexual allocation; hermaphrodite; ESS; evolution; lily; 繁殖; 1対1; 雌雄同株; シンク生長

To explain female-biased sexual allocation in cosexual plants, we developed a game theoretic model incorporating a source-sink relationship of flower/fruit growth. In this model, flower/fruit growth rate is either limited by its sink strength (the product of its potential relative growth rate and absolute size) or by the source strength (supply rate of reproductive resources) of the plant. We show that female-biased sexual allocation is evolutionarily stable if fruit growth is sink-limited at least in the early stage of its growth. The degree of female-bias is strong if the supply rate of reproductive resources is large relative to the potential relative growth rate. The degree of female-bias is also strong if the relative cost of producing one seed as compared with that of producing one ovule is large, in contrast to the previous sexual allocation models, in which the sexual allocation ratio is independent of the costs of producing one ovule and one seed. Thus, sink-limitation of fruit growth can be a general factor that selects for female-biased sexual allocation observed in cosexual plants irrespective of their mating systems.

为了解释雌性偏向的性分配在雌雄同体的植物，我们开发了一个博弈论模型，将源库关系的花/果实生长。在这个模型中，花/果生长速率要么受其库强度（其潜在相对生长速率和绝对大小的乘积）的限制，要么受植物的源强度（生殖资源的供应速率）的限制。我们表明，女性偏向性分配是进化稳定的，如果水果生长是水槽限制至少在其生长的早期阶段。如果生殖资源的供给率相对于潜在的相对增长率是大的，则女性偏向的程度是强的。如果产生一粒种子的相对成本与产生一个胚珠的相对成本相比很大，则雌性偏见的程度也很强，这与以前的性分配模型不同，在这些模型中，性分配比例独立于产生一个胚珠的成本。一个种子。因此，水果生长的库限制可以是一个普遍的因素，选择女性偏见的性分配观察到的雌雄同体的植物，无论他们的交配系统。

项目成果

Sakai,S.: "Why be completely outcrossing? evdutionary stable out crossing strategy" Evolutionary Ecology Research. 1. 211-222 (1999)

Sakai,S.：“为什么要完全异型杂交？进化稳定异型杂交策略”进化生态学研究。

Sakai,S.: "Evolutionarily stable resource allocation for production of wind-dispersed seeds" Evolutionary Eodogy. 12. 477-485 (1998)

Sakai，S.：“风散种子生产的进化稳定资源分配”进化生态学。

Sakai, S.: "Female-biosed sexual allocation in cosexual plants : result of sink-limited growth of fruits" Evolutionary Ecology Research. 1 (in press). (1999)

Sakai，S.：“同性植物中雌性生物的性分配：水果库限制生长的结果”进化生态学研究。

Sakai,S.: "Female-biased setual allocation in relation to growth rate of trvit in Erythromiurn japanieum" Oecologia. 117. 391-395 (1998)

Sakai，S.：“与 Erythromiurn japanieum 中 trvit 增长率相关的女性偏向设定分配”Oecologia。

Sakai,S.: "Dose the trade-off between growth and reproduction select?" Evolution. 52. 1204-1207 (1998)

Sakai,S.：“生长和繁殖之间的权衡是选择吗？”