DNA Ploidy Variation and Population Structure of the Morphologically Variable Helichrysum odoratissimum (L.) Sweet (Asteraceae) in South Africa

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F19%3A10407353" target="_blank" >RIV/00216208:11310/19:10407353 - isvavai.cz</a>

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=mp-f3_JwmD" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=mp-f3_JwmD</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1086/704355" target="_blank" >10.1086/704355</a>

Result language

angličtina

Original language name

DNA Ploidy Variation and Population Structure of the Morphologically Variable Helichrysum odoratissimum (L.) Sweet (Asteraceae) in South Africa

Original language description

Premise of research. Plant diversification can be a result of many different factors, such as environment or genome size variation. Further, the presence of phenotypic or genomic variation could highlight the presence of a cryptic lineage. Here, we tested whether phenotypic and genomic differences support the presence of a cryptic lineage in the South African populations of Helichrysum odoratissimum (L.) Sweet. Methodology. We used estimates of genetic structure from microsatellite data and cytogenetic data from 17 sampled populations, paired with morphological measurements from representative populations, to test for the presence of cryptic lineages. Pivotal results. Ploidy level estimates for the populations that span the species&apos; South African distribution indicated that 15 of the 17 populations contain either putative DNA-diploid or DNA-hexaploid individuals and that two populations contain both putative DNA-diploids and DNA-hexaploids. Population genetic analyses of seven microsatellite loci showed reduced admixture (gene flow) between populations of different ploidies, as well as across three geographic regions (Mpumalanga, the Drakensberg, and the Western Cape). We found leaf size differences between plants of different ploidy; plants with larger genome sizes exhibit longer and wider leaves than plants with smaller genome sizes. Conclusions. While the role of polyploidy in global floral diversification is well accepted, the extent to which polyploidy contributes to specific diverse regions, such as South Africa, is less well known. Our results suggest that morphologically variable populations of H. odoratissimum are distributed across distinct geographic regions in South Africa that coincide with different genome sizes. The Knsyna area of the Western Cape harbors a center of genomic diversity, as well as a cryptic hexaploid subspecies, possibly due to the variability in rainfall patterns, as summer rainfall changes over to winter rainfall in this region. This study contributes to the emerging work surrounding the microhabitat differences of ploidies within the context of establishment and subsequent divergence.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10611 - Plant sciences, botany

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

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

Name of the periodical

International Journal of Plant Sciences

ISSN

1058-5893

e-ISSN

—

Volume of the periodical

180

Issue of the periodical within the volume

7

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

755-767

UT code for WoS article

000482048600007

EID of the result in the Scopus database

2-s2.0-85069431149