PDF(Pubmed)
Abstract：
Understanding the factors driving ecological and evolutionary interactions of economically important plant species is important for agricultural sustainability. The geography of crop wild relatives, including wild potatoes (Solanum section Petota), have received attention; however, such information has not been analysed in combination with phylogenetic histories, genomic composition and reproductive systems to identify potential species for use in breeding for abiotic stress tolerance. We used a combination of ordinary least-squares (OLS) and phylogenetic generalized least-squares (PGLM) analyses to identify the discrete climate classes that make up the climate niche that wild potato species inhabit in the context of breeding system and ploidy. Self-incompatible diploid or self-compatible polyploid species significantly increase the number of discrete climate classes within a climate niche inhabited. This result was sustained when correcting for phylogenetic non-independence in the linear model. Our results support the idea that specific breeding system and ploidy combinations increase niche breadth through the decoupling of geographical range and niche diversity, and therefore, these species may be of particular interest for crop adaptation to a changing climate.
摘要：
了解驱动经济上重要的植物物种的生态和进化相互作用的因素对于农业可持续性很重要。作物野生近缘种的地理，包括野生土豆（茄科Petota），已经受到关注；然而，这些信息还没有结合系统发育史进行分析，基因组组成和生殖系统，以确定用于非生物胁迫耐受性育种的潜在物种。我们使用了普通最小二乘（OLS）和系统发育广义最小二乘（PGLM）分析的组合，以确定构成野生马铃薯物种在育种系统和倍性背景下栖息的气候生态位的离散气候类别。自不相容的二倍体或自相容的多倍体物种显着增加了居住的气候生态位内离散气候类别的数量。当校正线性模型中的系统发育非独立性时，此结果得以维持。我们的结果支持这样的观点，即特定的育种系统和倍性组合通过地理范围和生态位多样性的解耦增加生态位宽度，因此,这些物种可能对作物适应气候变化特别感兴趣。
