Characterization of a large sex determination region in Salix purpurea L. (Salicaceae)

Molecular Genetics and Genomics : MGG
Ran ZhouStephen P Difazio

Abstract

Dioecy has evolved numerous times in plants, but heteromorphic sex chromosomes are apparently rare. Sex determination has been studied in multiple Salix and Populus (Salicaceae) species, and P. trichocarpa has an XY sex determination system on chromosome 19, while S. suchowensis and S. viminalis have a ZW system on chromosome 15. Here we use whole genome sequencing coupled with quantitative trait locus mapping and a genome-wide association study to characterize the genomic composition of the non-recombining portion of the sex determination region. We demonstrate that Salix purpurea also has a ZW system on chromosome 15. The sex determination region has reduced recombination, high structural polymorphism, an abundance of transposable elements, and contains genes that are involved in sex expression in other plants. We also show that chromosome 19 contains sex-associated markers in this S. purpurea assembly, along with other autosomes. This raises the intriguing possibility of a translocation of the sex determination region within the Salicaceae lineage, suggesting a common evolutionary origin of the Populus and Salix sex determination loci.

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Citations

Apr 23, 2019·Annals of Botany·Craig H CarlsonLawrence B Smart
Jun 7, 2019·Biotechnology for Biofuels·Jonas A OhlssonAnn-Christin Rönnberg-Wästljung
Apr 10, 2019·Horticulture Research·Jing HouTongming Yin
Jun 30, 2019·Frontiers in Plant Science·Henrik R HallingbäckAnn-Christin Rönnberg-Wästljung
May 2, 2020·The New Phytologist·Simona BaránkováSònia Garcia
Feb 2, 2019·Scientific Reports·Veronika BalounovaBohuslav Janousek
Oct 6, 2020·The Plant Journal : for Cell and Molecular Biology·Qinggang LiaoJianbin Yan
Oct 8, 2020·Molecular Biology and Evolution·Wenlu YangTao Ma
Feb 2, 2021·Frontiers in Plant Science·Ana Paula Leite MontalvãoNiels Andreas Müller
Nov 10, 2020·Applications in Plant Sciences·Brian J SandersonMatthew S Olson
Jan 30, 2021·Heredity·Brian J SandersonMatthew S Olson
Feb 28, 2020·Current Opinion in Plant Biology·Guanqiao FengMatthew S Olson
May 12, 2021·Communications Biology·Adam L HealeyRobert J Henry
Aug 19, 2021·American Journal of Botany·Fred E GoukerLawrence B Smart
Nov 2, 2021·Nucleic Acids Research·Marco Di MarsicoRiccardo Aiese Cigliano

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Software Mentioned

LASTZ
Python scripts
CLC Genomics Workbench
HMMER
RepeatModeler
samtools
samtools mpileup
PAML package
Bowtie2
GATK package

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