Plasticity of Meiotic Recombination Rates in Response to Temperature in Arabidopsis.

Genetics
Andrew LloydKirsten Bomblies

Abstract

Meiotic recombination shuffles genetic information from sexual species into gametes to create novel combinations in offspring. Thus, recombination is an important factor in inheritance, adaptation, and responses to selection. However, recombination is not a static parameter; meiotic recombination rate is sensitive to variation in the environment, especially temperature. That recombination rates change in response to both increases and decreases in temperature was reported in Drosophila a century ago, and since then in several other species. But it is still unclear what the underlying mechanism is, and whether low- and high-temperature effects are mechanistically equivalent. Here, we show that, as in Drosophila, both high and low temperatures increase meiotic crossovers in Arabidopsis thaliana We show that, from a nadir at 18°, both lower and higher temperatures increase recombination through additional class I (interfering) crossovers. However, the increase in crossovers at high and low temperatures appears to be mechanistically at least somewhat distinct, as they differ in their association with the DNA repair protein MLH1. We also find that, in contrast to what has been reported in barley, synaptonemal complex length is negat...Continue Reading

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Citations

Jan 24, 2019·Genetics·Andrew Lloyd, Eric Jenczewski
Aug 27, 2019·PLoS Genetics·Richard J WangBret A Payseur
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May 20, 2021·Journal of Experimental Botany·Yazhong WangCharles J Underwood
Jul 27, 2021·Annual Review of Genetics·Ian R Henderson, Kirsten Bomblies
Nov 19, 2021·Genetics·Angela Belmonte TebarElena de la Casa-Esperon

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Methods Mentioned

BETA
flow cytometry
Fluorescence
transgenic

Software Mentioned

ZEN black
NIS
MADpatterns
ImageJ
Elements

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