进化途径降低生物质分配到作物中的种子层:从全米缩放的洞察力
Rubén Milla1, Adrianus J Westgeest2, Jorge Maestre-Villanueva1
1ECOEVO Group, Departamento de Biología, Geología, Física y Química Inorgánica, Instituto de Investigación en Cambio Global (IICG-URJC), Universidad Rey Juan Carlos, Tulipán s/n, Móstoles, 28933, Spain.
The New phytologist
|May 17, 2024
概括
农作物种子比它们的野生亲属更大,并且有更薄的种子外. 这项研究表明,虽然作物遵循一般的缩放趋势,但它们的种子外意外地更轻,这表明了超出简单化的复杂进化压力.
科学领域:
- 进化生物学是进化的生物学.
- 植物科学 植物科学
- 农业学是一种农业学.
背景情况:
- 农作物种子通常比野生祖先的种子更大,不那么休眠.
- 在野生植物中,种子质量和种子外分配表现出度缩放,较大的种子具有比例较小的种子外.
- 这种等量学表明,更大的种子和更轻的种子外可能在作物中共同进化.
研究的目的:
- 为了调查34种作物和22种野生祖先是否符合种子质量和种子外衣分配的既定全米缩放.
- 为了确定作物中的偏差是否表明了简单的共同选择之外的进化过程.
- 了解进化压力导致化作物中更大,轻质涂层的种子.
主要方法:
- 对34种作物和22种野生祖先的种子质量和种子外分配进行比较分析.
- 统计测试种子大小和种子外衣比例之间的全米缩放关系.
- 检查与已确定的全米斜率和交叉点的偏差.
主要成果:
- 两种作物及其野生祖先都表现出预测的种子质量和种子外衣分配的全度倾斜率.
- 一贯地,作物显示的种子外套比预测的更轻的种子大小 (偏离截取).
- 野生祖先表现出相同的趋势,表明这种特征早于或独立于化期间的人工选择.
结论:
- 在作物中,更大的种子和更轻的外套的进化很可能是一个多因素的过程.
- 这包括选择具有与种子大小相比本质上较小的种子外套的野生祖先.
- 其他促成因素包括早期种植期间的选择和与种子外衣-种子大小等量学相关的间接选择压力.
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