Reversal versus specialization in floral morphological evolution in Petrocosmea (Gesneriaceae)
Reversal versus specialization in floral morphological evolution in Petrocosmea (Gesneriaceae)
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Petrocosmea（苦苣苔科）花形态演化的逆转与特化
DOI：
10.1111/jse.12541
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发表时间：
2020-03
影响因子：
3.7
通讯作者：
Wang Yin-Zheng
中科院分区：
文献类型：
--
作者：
Li Chao-Qun;Lu Tian-Feng;Han Meng-Qi;Dong Yang;Li Peng-Wei;Liu Yan;Wang Yin-Zheng
在进化论中，一个被广泛接受的假设是，适应性特化限制了未来进化变化的潜在方向，因此可能是不可逆的，也被称为多洛定律。然而，这一假说在进化生物学中长期存在争议。花的专门化是有趣的，因为它通常与生殖隔离有关，并可能影响物种形成。在这里，四个新的分类群的发现后，我们观察到一些有趣的现象，反转与专业化的形态在一个分支与最专业化的花在属石蝴蝶。在基于多个DNA区域序列的系统发育树中，形态逆转，特别是长花冠筒的恢复，嵌套在具有短花冠筒和高度特化的左右对称的正常特化花的分支特征内。我们的研究结果表明，这个分支的高度专业化的花器官仍然是积极发展的多个分支走向专业化，而逆转到不同的祖先状态发生在一些分支。生态环境的大扰动可能是影响性状可逆性的关键因素，如喜马拉雅高原的快速隆升。本文对这四个新分类群进行了分类学处理。这个分支的花代表了一个有趣的模型，以探索进化逆转与专业化以及遗传因素和环境变量之间的相互作用的遗传基础。
A widely held hypothesis in evolution is that adaptive specialization constrains the potential direction of future evolutionary change and thus may be irreversible, also known as Dollo's law. However, this hypothesis has long been subject to debate in evolutionary biology. Floral specialization is intriguing as it is usually linked to reproductive isolation and could affect speciation. Here, following the discovery of four new taxa, we observed some interesting phenomena of reversal versus specialization in morphology in a clade with the most specialized flowers in the genus Petrocosmea. In the phylogenetic tree based on sequences of multiple DNA regions, the morphological reversals, especially the regain of a long corolla tube, are nested within the branches characteristic of normally specialized flowers with a short corolla tube and highly specialized zygomorphy. Our results indicate that the highly specialized floral organ of this clade is still actively evolving in multiple branches toward specialization while reversals to different ancestral states occur in some branches. Great disturbance of ecological environment is likely a crucial factor affecting trait reversibility, such as the rapid uplift of the Himalayan–Tibetan plateau. The four new taxa are treated herein taxonomically. The flowers of this clade represent an interesting model to explore the genetic basis underlying the evolutionary reversal versus specialization and the interplay between genetic factors and environmental variables.
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影响因子：
3.3
作者：
Caruso, CM
通讯作者：
Caruso, CM
Petrocosmea magnifica（苦苣苔科）：中国云南石灰岩洞穴中的一个新种
影响因子：
1.1
作者：
Han Meng-Qi;Lu Tian-Feng;Liu Yan
通讯作者：
Liu Yan
DOI：
10.2307/1375605
发表时间：
1955
期刊：
The Eugenics Review
影响因子：
--
作者：
S. D. Durrant;G. Simpson
通讯作者：
S. D. Durrant;G. Simpson
DOI：
10.1111/j.1438-8677.1996.tb00593.x
发表时间：
1996-10
期刊：
--
影响因子：
--
作者：
C. Erbar;P. Leins
通讯作者：
C. Erbar;P. Leins
DOI：
10.1111/j.1096-0031.1996.tb00196.x
发表时间：
1994-09-01
期刊：
CLADISTICS-THE INTERNATIONAL JOURNAL OF THE WILLI HENNIG SOCIETY
影响因子：
--
作者：
FARRIS, JS;KALLERSJO, M;BULT, C
通讯作者：
BULT, C