The contribution of recombination to heterozygosity differs among plant evolutionary lineages and life-forms.

BMC Evolutionary Biology
Juan P Jaramillo-CorreaSantiago C González-Martínez

Abstract

Despite its role as a generator of haplotypic variation, little is known about how the rates of recombination evolve across taxa. Recombination is a very labile force, susceptible to evolutionary and life trait related processes, which have also been correlated with general levels of genetic diversity. For example, in plants, it has been shown that long-lived outcrossing taxa, such as trees, have higher heterozygosity (He) at SSRs and allozymes than selfing or annual species. However, some of these tree taxa have surprisingly low levels of nucleotide diversity at the DNA sequence level, which points to recombination as a potential generator of genetic diversity in these organisms. In this study, we examine how genome-wide and within-gene rates of recombination evolve across plant taxa, determine whether such rates are influenced by the life-form adopted by species, and evaluate if higher genome-wide rates of recombination translate into higher He values, especially in trees. Estimates of genome-wide (cM/Mb) recombination rates from 81 higher plants showed a significant phylogenetic signal. The use of different comparative phylogenetic models demonstrated that there is a positive correlation between recombination rate and He (0....Continue Reading

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Citations

Nov 15, 2015·Plant Science : an International Journal of Experimental Plant Biology·Fikret IsikLaurent Bouffier
Dec 4, 2015·Proceedings. Biological Sciences·Isabel Rodríguez-QuilónSantiago C González-Martínez
May 12, 2012·Molecular Ecology·C BurgarellaS C González-Martínez
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Jan 2, 2020·Evolutionary Applications·Amanda R De La TorreIlga Porth
Mar 24, 2017·Molecular Biology and Evolution·Amanda R De La TorrePär K Ingvarsson
Oct 3, 2020·Evolutionary Applications·Thibaut CapblancqStephen R Keller
Jan 29, 2020·Evolutionary Applications·Tanja PyhäjärviOuti Savolainen
Oct 17, 2020·Molecular Ecology·Juan P Jaramillo-CorreaSantiago C González-Martínez
Feb 27, 2021·Molecular Phylogenetics and Evolution·Jorge Cruz-NicolásJuan P Jaramillo-Correa

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Software Mentioned

LDhat
rhothetapost
Phylomatic
APE
Phylocom
Lasergen SeqMan
APE package for R

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