Taxonomic Status of Daduhe Loquat （Eriobotrya prinoides var. dadunensis）

The taxonomic status of Daduhe loquat （E. prinoides var. dadunensis） was studied through analyzing genetic relationships among Oakleaf loquat （E. prinoides）, Daduhe loquat and Common loquat （E. japonica） using inter simple sequence repeats （ISSR） molecular marker and morphologic marker in this paper. Based on ISSR marker research, the similarity coefficient between Oakleaf loquat and Common loquat was lower than the similarity coefficient between Oakleaf loquat and Daduhe loquat while the similarity coefficient between Daduhe loquat and Common loquat was intermediate. The highest additivity was obtained when Daduhe loquat was regarded as the undetermined hybrid （45.8%）. The specific bands of Oakleaf loquat and Common loquat were present in Daduhe loquat. Based on morphologic traits research, Daduhe loquat was also between Oakleaf loquat and Common loquat but a little leaning to Oakleaf loquat. All the results support that Daduhe loquat was hybrid of Oakleaf loquat and Common loquat.

普通枇杷、大渡河枇杷和栎叶枇杷遗传关系研究——基于RAPD和AFLP分析

利用筛选得到的24个随机引物和5对AFLP引物组合对普通枇杷、大渡河枇杷及栎叶枇杷的遗传关系进行RAPD及AFLP分析,结果表明,普通枇杷与栎叶枇杷的相似性系数最小(0.3864和0.5364),而大渡河枇杷介于普通枇杷和栎叶枇杷之间,偏向于栎叶枇杷。分别以普通枇杷、大渡河枇杷和栎叶枇杷作为待定杂种,计算了三者谱带的叠加性,结果表明,无论是RAPD分子标记,还是AFLP分子标记,以大渡河枇杷作待定杂种获得最高叠加性,支持大渡河枇杷可能是普通枇杷与栎叶枇杷的杂交种的结论。