Growth form evolution and hybridization in Senecio (Asteraceae) from the high equatorial Andes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F17%3A10371582" target="_blank" >RIV/00216208:11310/17:10371582 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1002/ece3.3206" target="_blank" >http://dx.doi.org/10.1002/ece3.3206</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/ece3.3206" target="_blank" >10.1002/ece3.3206</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Growth form evolution and hybridization in Senecio (Asteraceae) from the high equatorial Andes

Popis výsledku v původním jazyce

Changes in growth forms frequently accompany plant adaptive radiations, including paramo-a high-elevation treeless habitat type of the northern Andes. We tested whether diverse group of Senecio inhabiting montane forests and paramo represented such growth form changes. We also investigated the role of Andean geography and environment in structuring genetic variation of this group. We sampled 108 populations and 28 species of Senecio (focusing on species from former genera Lasiocephalus and Culcitium) and analyzed their genetic relationships and patterns of intraspecific variation using DNA fingerprinting (AFLPs) and nuclear DNA sequences (ITS). We partitioned genetic variation into environmental and geographical components. ITS-based phylogeny supported monophyly of a Lasiocephalus-Culcitium clade. A grade of herbaceous alpine Senecio species subtended the Lasiocephalus-Culcitium clade suggesting a change from the herbaceous to the woody growth form. Both ITS sequences and the AFLPs separated a group composed of the majority of paramo subshrubs from other group(s) comprising both forest and paramo species of various growth forms. These morphologically variable group(s) further split into clades encompassing both the paramo subshrubs and forest lianas, indicating independent switches among the growth forms and habitats. The finest AFLP genetic structure corresponded to morphologically delimited species except in two independent cases in which patterns of genetic variation instead reflected geography. Several morphologically variable species were genetically admixed, which suggests possible hybrid origins. Latitude and longitude accounted for 5%-8% of genetic variation in each of three AFLP groups, while the proportion of variation attributed to environment varied between 8% and 31% among them. A change from the herbaceous to the woody growth form is suggested for species of high-elevation Andean Senecio. Independent switches between habitats and growth forms likely occurred within the group. Hybridization likely played an important role in species diversification.

Název v anglickém jazyce

Growth form evolution and hybridization in Senecio (Asteraceae) from the high equatorial Andes

Popis výsledku anglicky

Changes in growth forms frequently accompany plant adaptive radiations, including paramo-a high-elevation treeless habitat type of the northern Andes. We tested whether diverse group of Senecio inhabiting montane forests and paramo represented such growth form changes. We also investigated the role of Andean geography and environment in structuring genetic variation of this group. We sampled 108 populations and 28 species of Senecio (focusing on species from former genera Lasiocephalus and Culcitium) and analyzed their genetic relationships and patterns of intraspecific variation using DNA fingerprinting (AFLPs) and nuclear DNA sequences (ITS). We partitioned genetic variation into environmental and geographical components. ITS-based phylogeny supported monophyly of a Lasiocephalus-Culcitium clade. A grade of herbaceous alpine Senecio species subtended the Lasiocephalus-Culcitium clade suggesting a change from the herbaceous to the woody growth form. Both ITS sequences and the AFLPs separated a group composed of the majority of paramo subshrubs from other group(s) comprising both forest and paramo species of various growth forms. These morphologically variable group(s) further split into clades encompassing both the paramo subshrubs and forest lianas, indicating independent switches among the growth forms and habitats. The finest AFLP genetic structure corresponded to morphologically delimited species except in two independent cases in which patterns of genetic variation instead reflected geography. Several morphologically variable species were genetically admixed, which suggests possible hybrid origins. Latitude and longitude accounted for 5%-8% of genetic variation in each of three AFLP groups, while the proportion of variation attributed to environment varied between 8% and 31% among them. A change from the herbaceous to the woody growth form is suggested for species of high-elevation Andean Senecio. Independent switches between habitats and growth forms likely occurred within the group. Hybridization likely played an important role in species diversification.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10611 - Plant sciences, botany

Projekt

<a href="/cs/project/GA206%2F07%2F0273" target="_blank" >GA206/07/0273: Fylogeneze rodu Lasiocephalus (Asteraceae) - historie kolonizování prostředí rovníkových páramos</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Ecology And Evolution

ISSN

2045-7758

e-ISSN

—

Svazek periodika

7

Číslo periodika v rámci svazku

16

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

6455-6468

Kód UT WoS článku

000409528000036

EID výsledku v databázi Scopus

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