The role of recombination landscape in species hybridisation and speciation

Frontiers in Plant Science, Journal Year: 2023, Volume and Issue: 14

Published: July 6, 2023

It is now well recognised that closely related species can hybridize and exchange genetic material, which may promote or oppose adaptation speciation. In some cases, interspecific hybridisation very common, making it surprising identity preserved despite active gene exchange. The genomes of most eukaryotic are highly heterogeneous with regard to density, abundance repetitive DNA, chromatin compactisation etc, make certain genomic regions more prone resistant introgression material from other species. Heterogeneity in local recombination rate underpins many the observed patterns across genome (e.g. actively recombining typically rich depleted for DNA) strongly affect permeability introgression. larger region lacking recombination, higher chance presence incompatibility gene(s) region, entire non- rarely block impermeable Large plant tend have landscape, frequently occurring at ends chromosomes central recombination. this paper we review relationship between plants argue large likely play a major role preserving hybridising

Language: Английский

Genes involved in auxin biosynthesis, transport and signalling underlie the extreme adventitious root phenotype of the tomato aer mutant

Theoretical and Applied Genetics, Journal Year: 2024, Volume and Issue: 137(4)

Published: March 8, 2024

Abstract The use of tomato rootstocks has helped to alleviate the soaring abiotic stresses provoked by adverse effects climate change. Lateral and adventitious roots can improve topsoil exploration nutrient uptake, shoot biomass resulting overall yield. It is essential understand genetic basis root structure development how lateral are produced. Existing mutant lines with specific phenotypes an excellent resource analyse comprehend molecular developmental traits. aerial ( aer ) exhibits extreme rooting phenotype on primary stem. known that this associated restricted polar auxin transport from juvenile more mature stem, but prior study, loci responsible for were unknown. We used genomic approaches define polygenic nature provide evidence increased expression biosynthesis, signalling genes in different causes initiation primordia stems. Our results allow selection levels using markers, potentially contributing rootstock breeding strategies grafted vegetable crops, especially tomato. In crops vegetatively propagated as cuttings, such fruit trees cane fruits, orthologous may be useful cultivars amenable propagation.

Language: Английский