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为了从野生型驯化为栽培品种的角度了解枇杷(Eriobotrya japonica Lindl.)的遗传多样性,对55个来自世界各地有代表性的栽培品种及多份野生枇杷的cpDNATrnS-TrnG及cpDNATrnQ-rps16基因位点序列的核苷酸多态性进行了比较分析。结果显示:栽培枇杷群体在这两个基因位点不存在变异,而野生枇杷群体在cpDNATrnS-TrnG位点出现了两个替代变异及1个插入/缺失变异,在cpDNATrnQ-rps16位点出现了3个替代变异及两个插入/缺失变异,表明在从野生型驯化为栽培品种的过程中发生了严重的遗传瓶颈,导致了栽培枇杷群体的遗传基础狭窄。
In order to understand the genetic diversity of Eriobotrya japonica Lindl from the perspective of wild-type domesticated cultivars, the cpDNATrnS-TrnG and cpDNATrnQ-rps16 loci of 55 representative cultivars and wild loquat from 55 cultivars Point sequence nucleotide polymorphisms were analyzed comparatively. The results showed that there was no variation in cultivated loquat populations at these two loci, while wild loquat populations showed two substitutional mutations and one insertion / deletion mutation at cpDNATrnS-TrnG sites, with 3 A substitutional variant and two insertional / deletion variations indicate that a severe genetic bottleneck occurred during domestication from wild-type to cultivated species, resulting in a narrow genetic basis for cultivated loquat populations.