Origin of Triploids of Elatostema suzukii (Urticaceae) on Okinawa Island, the Ryukyus
Origin of Triploids of Elatostema suzukii (Urticaceae) on Okinawa Island, the Ryukyus
复制标题
琉球群岛冲绳岛 Elatostema suzukii（荨麻科）三倍体的起源
DOI：
10.1007/pl00014000
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发表时间：
2001
影响因子：
2.8
通讯作者：
M. Yokota
中科院分区：
文献类型：
--
作者：
K. Tamaki;T. Denda;M. Yokota
Elatostema suzukii 是一种特有物种，仅出现在冲绳岛北部琉球山原地区的溪流沿岸，已知由 x=13 的二倍体、三倍体和四倍体组成。叶绿体DNA序列的分子分析表明，铃木大肠杆菌存在两种单倍型：AT型和NI型，其特征是四个核苷酸“ATAT”的插入或缺失。 AT型仅在玄香川遗址的一些二倍体和三倍体中发现，而NI型则广泛存在于玄香川遗址以及其他地方的二倍体和三倍体中。三倍体与二倍体共有两种类型，表明三倍体至少有两个独立的起源。由于其分布范围有限，AT 型三倍体可能出现在玄香川地区。
Elatostema suzukii, an endemic species occurring only along streams in the Yanbaru area in the north of Okinawa Island, the Ryukyus, is known to comprise di-, tri-, and tetraploids with x=13. Molecular analysis of chloroplast DNA sequences has shown that two haplotypes, AT- and NI-types, characterized by the insertion or deletion of four nucleotides “ATAT”, exist in E. suzukii. The AT-type was found in some diploids and triploids only at Genkagawa, whereas the NI-type is widespread, occurring in both diploids and triploids of the Genkagawa site as well as at other localities. The triploids share both types with the diploids, indicating that the triploids have at least two independent origins. Because of its restricted distribution, the AT-type triploid may have arisen within the Genkagawa area.