ArticlePloS one2017
Broad-scale recombination pattern in the primitive bird Rhea americana (Ratites, Palaeognathae).
Article in PloS one, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed, 12 citations in OpenAlex.
- The Density of Recombination-Associated Genomic Features Does Not Generally Explain the Broad-Scale Crossover Patterns in Chicken and Guinea Fowl.Animals : an open access journal from MDPI · 2025Article
- The evolutionary maintenance of ancient recombining sex chromosomes in the ostrich.PLoS genetics · 2023Article
- Genomic insights into the evolutionary relationships and demographic history of kiwi.PloS one · 2022Article
- Demographic decline and lineage-specific adaptations characterize New Zealand kiwi.Proceedings. Biological sciences · 2021Article
- Why Do Some Sex Chromosomes Degenerate More Slowly Than Others? The Odd Case of Ratite Sex Chromosomes.Genes · 2020Article
- MLH1 focus mapping in the guinea fowl (Numida meleagris) give insights into the crossover landscapes in birds.PloS one · 2020Article
- Evolutionary Dynamics of Sex Chromosomes of Paleognathous Birds.Genome biology and evolution · 2019Article
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Authors and funding
2 authors at 1 institution in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
Birds have genomic and chromosomal features that make them an attractive group to analyze the evolution of recombination rate and the distribution of crossing over. Yet, analyses are biased towards certain species, especially domestic poultry and passerines. Here we analyze for the first time the recombination rate and crossover distribution in the primitive ratite bird, Rhea americana (Rheiformes, Palaeognathae). Using a cytogenetic approach for in situ mapping of crossovers we found that the total genetic map is 3050 cM with a global recombination rate of 2.1 cM/Mb for female rheas. In the five largest macrobivalents there were 3 or more crossovers in most bivalents. Recombination rates for macrobivalents ranges between 1.8-2.1 cM/Mb and the physical length of their synaptonemal complexes is highly predictive of their genetic lengths. The crossover rate at the pseudoautosomal region is 2.1 cM/Mb, similar to those of autosomal pairs 5 and 6 and only slightly higher compared to other macroautosomes. It is suggested that the presence of multiple crossovers on the largest macrobivalents is a feature common to many avian groups, irrespective of their position throughout phylogeny. These data provide new insights to analyze the heterogeneous recombination landscape of birds.
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