ArticleScientific reports2020
Repetitive sequences and structural chromosome alterations promote intraspecific variations in Zea mays L. karyotype.
Article in Scientific reports, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Integrating genome size variation, ISSR-derived genetic structure, and phenotypical traits from the Southern Peruvian Andean maize (Frontiers in plant science · 2026Article
- DNA content, repeatome composition and origin of the Zea mays micronuclei.Scientific reports · 2025Article
- Chromosome distribution of four LTR retrotransposons and 18 S rDNA in coffea eugenioides.Scientific reports · 2025Article
- Plasticity of the mitotic spindle in response to karyotype variation.Current biology : CB · 2024Article
- Carica papaya L. sex chromosome review and physical mapping of the serk 2, svp-like and mdar 4 sequences.Scientific reports · 2024Article
- Genomes of the Orestias pupfish from the Andean Altiplano shed light on their evolutionary history and phylogenetic relationships within Cyprinodontiformes.BMC genomics · 2024Article
- Molecular and Cytogenetic Analysis of rDNA Evolution in Crepis Sensu Lato.International journal of molecular sciences · 2022Article
Corrections and comments
- Erratum issued
Authors and funding
4 authors.
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Abstract
LTR-retrotransposons, knobs and structural chromosome alterations contribute to shape the structure and organization of the Zea mays karyotype. Our initial nuclear DNA content data of Z. mays accessions revealed an intraspecific variation (2 C = 2.00 pg to 2 C = 6.10 pg), suggesting differences in their karyotypes. We aimed to compare the karyotypes of three Z. mays accessions in search of the differences and similarities among them. Karyotype divergences were demonstrated among the accessions, despite their common chromosome number (2n = 20) and ancestral origin. Cytogenomic analyses showed that repetitive sequences and structural chromosome alterations play a significant role in promoting intraspecific nuclear DNA content variation. In addition, heterozygous terminal deletion in chromosome 3 was pointed out as a cause of lower nuclear 2 C value. Besides this, translocation was also observed in the short arm of chromosome 1. Differently, higher 2 C value was associated with the more abundant distribution of LTR-retrotransposons from the family Grande in the karyotype. Moreover, heteromorphism involving the number and position of the 180-bp knob sequence was found among the accessions. Taken together, we provide insights on the pivotal role played by repetitive sequences and structural chromosome alterations in shaping the karyotype of Z. mays.
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