Phylogenetic Relationships of Solanum Series Conicibaccata and Related Species in Solanum Section Petota Inferred from Five Conserved Ortholog Sequences
Phylogenetic Relationships of Solanum Series Conicibaccata and Related Species in Solanum Section Petota Inferred from Five Conserved Ortholog Sequences
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DOI：
10.1600/036364411x553252
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发表时间：
2011-01-01
影响因子：
1
通讯作者：
Spooner, David M.
中科院分区：
文献类型：
--
作者：
Fajardo, Diego;Spooner, David M.
Conicibaccata是Peteta组的第二大系列，包含40种，广泛分布于墨西哥南部至玻利维亚中部。它包括二倍体（2n = 2x = 24）、四倍体（271 = 4x = 48）和六倍体（2，1 = 6x = 72），并且有限数量的物种已被证明是异源多倍体。以前的形态学和分子生物学研究，利用质体DNA未能区分明确的物种界限。利用COSII序列分析技术，比较了Conicibaccata系列22个种72份材料与近缘系列42份材料的亲缘关系。结果支持了之前的研究，即Conicibaccata系列的二倍体成员与其他南美洲“进化枝4”物种有关，并表明进化枝4成员和“进化枝3”的其他南美洲物种（Piurana系列和相关物种）中的所有多倍体都是异源多倍体。低自举支持值和形态相似性表明最近的起源和需要减少系列Conicibaccata的公认物种的数量。
Solanum series Conicibaccata is the second largest series in section Pet eta, containing 40 species widely distributed from southern Mexico to central Bolivia. It contains diploids (2n = 2x = 24), tetraploids (271 = 4x = 48) and hexaploids (2,1 = 6x = 72), and the limited number of species examined have been shown to be allopolyploids. Previous morphological and molecular studies using plastid DNA failed to discriminate clear species boundaries. Conserved orthologous nuclear DNA sequences (COSII) were used to compare the relationships among 72 accessions from 22 species from series Conicibaccata and 42 additional accessions from related series. The results supported previous studies showing the diploid members of series Conicibaccata to be related to other South American "clade 4" species, and showed all of the polyploids to be allopolyploids among members of clade 4 and other South American species of "clade 3" (series Piurana and related species). Low bootstrap support values and morphological similarity suggest recent origins and the need for a reduction in number of recognized species in series Conicibaccata.