In:
Nature Communications, Springer Science and Business Media LLC, Vol. 8, No. 1 ( 2017-11-02)
Abstract:
Sex chromosomes evolved from autosomes many times across the eukaryote phylogeny. Several models have been proposed to explain this transition, some involving male and female sterility mutations linked in a region of suppressed recombination between X and Y (or Z / W , U / V ) chromosomes. Comparative and experimental analysis of a reference genome assembly for a double haploid YY male garden asparagus ( Asparagus officinalis L.) individual implicates separate but linked genes as responsible for sex determination. Dioecy has evolved recently within Asparagus and sex chromosomes are cytogenetically identical with the Y , harboring a megabase segment that is missing from the X . We show that deletion of this entire region results in a male-to-female conversion, whereas loss of a single suppressor of female development drives male-to-hermaphrodite conversion. A single copy anther-specific gene with a male sterile Arabidopsis knockout phenotype is also in the Y- specific region, supporting a two-gene model for sex chromosome evolution.
Type of Medium:
Online Resource
ISSN:
2041-1723
DOI:
10.1038/s41467-017-01064-8
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2017
detail.hit.zdb_id:
2553671-0