The previously described fusion in P. Chromosoma 14 : 45— Genomic conflict and transitions in sex determination More generally, selection on the sex ratio can trigger transitions between and among different ESD and GSD systems .
Systems that involve interacting somatic and germ line sex determination mechanisms may also limit transitions of sex-determining mechanisms, since changes in either germ line sex or somatic sex alone may produce infertile individuals .
These myths do not survive a survey of sex determination systems across the tree of life.
PLoS Biol 5: e The deletions causing hermaphroditism bsx mutationsand those causing complete sterility ie early-stage anther abortion of Y-bearing plants asx mutationsas well as the X subtelomeric sequence, are described in Farbos et al and Lardon et aland the Bgl markers are described in Donnison et al PLoS Biol 3: e View Article Google Scholar 6.
Dioecy and its correlates in the flowering plants. Nucleo-cytoplasmic conflict: conflict in inheritance patterns between the nuclear genome and organelle genomes that are transmitted only maternally. In Silence latifoliathe two X chromosomes differ in the time of replication, as might be expected if one of them is transcriptionally silenced, and they appear to be differentially methylated, possibly indicating that dosage compensation is occurring by X inactivation in females Vyskot et al, Rice, WR FEBS J —
Semin Cell Dev Biol 18 : — Unless recombination is already arrested 48recombination appears to cease in stages on the Y-chromosome such that strata develop over time, with the youngest strata closest to the PAR. The cumulative length of the Y-specific contigs was calculated to be the sum of the calculated copy number of each predicted Y-chromosome contig multiplied by the contig length.
Nigon element determination in B. Heteromorphic sex chromosomes evolve from autosomes that are initially identical but then stop recombining and differentiate. Curr Top Dev Biol 83 : 1—
Blumenthal, T. Otto, T. When separate sexes are favored, the transition can occur via several evolutionary pathways. Whitton, C. Using single molecule sequencing PacBio , optical mapping, and manual curation, we assembled the B.