Sex‐chrom, a database on plant sex chromosomes
نویسندگان
چکیده
منابع مشابه
Plant Evolution: Modern Sex Chromosomes
The first detailed map has been produced of a plant chromosome carrying sex-determining genes. The new data show that, in papaya, these genes lie in a quite extensive non-recombining region. This region is nevertheless a small part of the papaya genome compared with other male-specific genome regions, such as mammalian Y chromosomes.
متن کاملPlant Sex Chromosomes: A Non-Degenerated Y?
Animal Y chromosomes have undergone chromosome-wide degeneration in response to a lack of recombination, and ancient Ys contain few functional genes. Recent research suggests that plant Y chromosomes may evolve differently and retain most of their ancestral genes.
متن کاملPlant Sex Chromosomes: Lost Genes with Little Compensation
In many animals, gene loss on Y chromosomes is compensated through altered expression of their X-chromosome homologue. Now, however, a new study in plants finds that even genes deleted from the Y show no dosage compensation.
متن کاملRapid Y degeneration and dosage compensation in plant sex chromosomes.
The nonrecombining regions of animal Y chromosomes are known to undergo genetic degeneration, but previous work has failed to reveal large-scale gene degeneration on plant Y chromosomes. Here, we uncover rapid and extensive degeneration of Y-linked genes in a plant species, Silene latifolia, that evolved sex chromosomes de novo in the last 10 million years. Previous transcriptome-based studies ...
متن کاملEvolution and Survival on Eutherian Sex Chromosomes
Since the two eutherian sex chromosomes diverged from an ancestral autosomal pair, the X has remained relatively gene-rich, while the Y has lost most of its genes through the accumulation of deleterious mutations in nonrecombining regions. Presently, it is unclear what is distinctive about genes that remain on the Y chromosome, when the sex chromosomes acquired their unique evolutionary rates, ...
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ژورنال
عنوان ژورنال: New Phytologist
سال: 2020
ISSN: 0028-646X,1469-8137
DOI: 10.1111/nph.16635