Genetic Diversity and Phylogenetic Relationships of Capsicum frutescens in the Asia–Pacific Region: The Pacific Dispersal Route

IF 1 3区 历史学 0 ARCHAEOLOGY
Sota Yamamoto, Sota Koeda, Ryutaro Nakano, Shota Sakaguchi, Atsushi J. Nagano, Yoshiyuki Tanaka, Fumiya Kondo, Kenichi Matsushima, Nobuhiko Komaki
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Abstract

Capsicum peppers are among the oldest domesticated crops in the Americas. Columbus introduced them to Europe, from where they spread to the Far East via Africa, South Asia, and Southeast Asia. However, the details of how Capsicum peppers were introduced into the Asia–Pacific region and their subsequent dispersal remain unknown. Therefore, we investigated the genetic diversity and relationships of Capsicum frutescens in the Asia–Pacific region through restriction site-associated DNA sequencing (RAD-seq) and the sequencing of a variable chloroplast genome locus. The RAD-seq analysis showed that three accessions from Japan are most closely related to those from the Americas and Micronesia, and are distant from most of those from islands and continental Southeast Asia. Although C. frutescens has two chloroplast haplotypes (T and TC), only the T type was found in the Americas and Japan, whereas both types were distributed in other regions. Therefore, we postulate that some C. frutescens accessions were introduced into the Asia–Pacific region from the Americas via the Pacific dispersal route, whereas only the T type was introduced into Japan. Evidence for this Pacific dispersal route of C. frutescens could lead to a reconsideration of the dispersal routes of other crops native to the Americas.

Abstract Image

亚太地区辣椒的遗传多样性和系统发育关系:太平洋传播路线
辣椒是美洲最古老的驯化作物之一。哥伦布将辣椒引入欧洲,然后经非洲、南亚和东南亚传播到远东地区。然而,辣椒如何传入亚太地区及其随后的传播细节仍不为人知。因此,我们通过限制性位点相关 DNA 测序(RAD-seq)和一个可变叶绿体基因组位点的测序,研究了辣椒在亚太地区的遗传多样性和关系。RAD-seq分析表明,日本的三个登录品系与美洲和密克罗尼西亚的登录品系亲缘关系最密切,而与大多数岛屿和东南亚大陆的登录品系亲缘关系较远。虽然 C. frutescens 有两种叶绿体单倍型(T 和 TC),但在美洲和日本只发现了 T 型,而这两种类型在其他地区都有分布。因此,我们推测一些 C. frutescens 入选品种是通过太平洋扩散路线从美洲引入亚太地区的,而只有 T 型被引入日本。关于 C. frutescens 太平洋扩散路线的证据可能会促使人们重新考虑美洲原生其他作物的扩散路线。
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来源期刊
CiteScore
2.20
自引率
12.50%
发文量
36
期刊介绍: International Journal of Historical Archaeology is the first authoritative resource for scholarly research on this rapidly growing field. Articles - contributed by an international body of experts - contain current theoretical, methodological, and site-specific research. Exploring a wide-range of topics, articles focus on the post-1492 period and includes studies reaching into the Late Medieval period. In addition, the journal makes global connections between sites, regions, and continents. International Journal of Historical Archaeology will fulfill the needs of archaeologists, students, historians, and historical preservationists as well as practionioners of other closely related disciplines. For more detailed information about this new journal, including complete submission instructions, please visit the http://www.ilstu.edu/~ceorser/ijha.html International Journal of Historical Archaeology Web Site. Rated ''A'' in the European Reference Index for the Humanities (ERIH) International Journal of Historical Archaeology is rated ''A'' in the ERHI, a new reference index that aims to help evenly access the scientific quality of Humanities research output. For more information visit http://www.esf.org/research-areas/humanities/activities/research-infrastructures.html Rated ''A'' in the Australian Research Council Humanities and Creative Arts Journal List. For more information, visit: http://www.arc.gov.au/era/journal_list.htm
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