ArticleMolecular genetics and genomics : MGG2013
Organelle DNA accumulation in the recently evolved papaya sex chromosomes.
Article in Molecular genetics and genomics : MGG, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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14 citing papers in PubMed, 24 citations in OpenAlex.
- Insights into Nuclear Mitochondrial Sequence Distribution in the Pig Genome Based on the Latest Reference Assembly.Animals : an open access journal from MDPI · 2026Article
- Analyses of contiguous reference genomes of Amaranthus tuberculatus highlight the landscape of the sex-associated region and PEBP gene family diversity.BMC genomics · 2025Article
- Plastid DNA is a major source of nuclear genome complexity and of RNA genes in the orphan crop moringa.BMC plant biology · 2024Article
- Evolutionary trajectory of organelle-derived nuclear DNAs in the Triticum/Aegilops complex species.Plant physiology · 2024Article
- Genomic variation between PRSV resistant transgenic SunUp and its progenitor cultivar Sunset.BMC genomics · 2020Article
- Nuclear Integrants of Organellar DNA Contribute to Genome Structure and Evolution in Plants.International journal of molecular sciences · 2020Review
- Article
- Characterization of the complete chloroplast genome ofMitochondrial DNA. Part B, Resources · 2019Article
- Review
- Extremely low nucleotide diversity in the X-linked region of papaya caused by a strong selective sweep.Genome biology · 2016Article
- Review
- Impact of repetitive DNA on sex chromosome evolution in plants.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2015Article
- Genome sequence comparison reveals a candidate gene involved in male-hermaphrodite differentiation in papaya (Carica papaya) trees.Molecular genetics and genomics : MGG · 2015Article
- Dynamic transposable element accumulation in the nascent sex chromosomes of papaya.Mobile genetic elements · 2013Article
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2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Sex chromosomes are a pair of specialized chromosomes containing a sex determination region that is suppressed for recombination. Without recombination, Y chromosomes are thought to accumulate repetitive DNA sequences which contribute to their degeneration. A pair of primitive sex chromosomes controls sex type in papaya with male and hermaphrodite determined by the slightly different male-specific region of the Y (MSY) and hermaphrodite-specific region of Y(h) (HSY) chromosomes, respectively. Here, we show that the papaya HSY and MSY in the absence of recombination have accumulated nearly 12 times the amount of chloroplast-derived DNA than the corresponding region of the X chromosome and 4 times the papaya genome-wide average. Furthermore, a chloroplast genome fragment containing the rsp15 gene has been amplified 23 times in the HSY, evidence of retrotransposon-mediated duplication. Surprisingly, mitochondria-derived sequences are less abundant in the X and HSY compared to the whole genome. Shared organelle integrations are sparse between X and HSY, with only 11 % of chloroplast and 12 % of mitochondria fragments conserved, respectively, suggesting that the accelerated accumulation of organelle DNA occurred after the HSY was suppressed for recombination. Most of the organelle-derived sequences have divergence times of <7 MYA, reinforcing this notion. The accumulated chloroplast DNA is evidence of the slow degeneration of the HSY.
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