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The Origin and evolution of multiple polyploid lines in the natural populations of Dumortiera hirsuta.

毛杜莫蒂拉自然群体中多个多倍体系的起源和进化。

基本信息

批准号：
09839031
负责人：
AKIYAMA Hiroyuki
金额：
$ 1.86万
依托单位：
Himeji Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09839031/
关键词：
Dumortiera hirsuta polyploids allozyme atpB-rbcL region of c-DNA atpB-rbcL遺伝子間領域 rbcL-atpB アイソザイム

项目摘要

By the use of chomosome analyses, allozyme polymorphisms, and c-DNA sequneces, we have found the following points ;1. We can recogninize more than seven biological units in the monoploid of Dumortiera hirsuta in the Eastern and Southeastern Asia. It is difficult to distinguish them only by their outer morphologies. In addition, polypolids show distant genetic relationships to any of the monoploid plants.2. Almost all cases, diploids and triploids of Dumortiera hirsuta show fixed heterozygosity in several loci among 12 loci examined by allozyme technique. Thus, we considered that diploids are allopolyploids. This means that polyploids have originated by hybridization between different biological units of monoploids described above.3. We found triploid Dumortiera hirsuta in Japan (Honshu, Shikoku, Kyushu, Ryukyu), Southern China, Malay Penisula, and Borneo. Triploids found in Japan and China cannot been distiguished by allozyme variation and thus can be treated as belonging to the same biological units. Those of Malay Penisula and Borneo are different from Japanese and Chinese one, respectively.4. In the all populations where monoploids and polyploids grow side-by-side, cp-DNA type of monoploids differs from that of polypolids. Therefore, we cannot asertain the origin of polyploids in this study and left for future examination.

通过染色体分析、等位酶多态性和c-DNA序列分析，我们发现：1。在东亚和东南亚地区的单倍体毛杜氏木中，可以识别出7个以上的生物学单位。很难仅通过它们的外部形态来区分它们。此外，多倍体植物与任何一种单倍体植物都有较远的遗传关系。利用等位酶技术检测的12个位点中，几乎所有的二倍体和三倍体都表现出固定的杂合性。因此，我们认为二倍体是异源多倍体。这意味着多倍体是由上述不同生物单元的单倍体杂交而产生的。我们在日本（本州、四国、九州、琉球）、中国南部、马来半岛和婆罗洲发现了三倍体毛单孢菌。在日本和中国发现的三倍体不能用等位酶变异来区分，因此可以被视为属于同一生物单位。马来半岛和婆罗洲分别与日本和中国不同.在所有的多倍体和单倍体共存的群体中，多倍体和单倍体的cp-DNA类型不同。因此，本研究不能确定多倍体的起源，有待进一步研究。