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Karyotypes and recombination patterns of the Common Swift(Apus apus Linnaeus,1758) and Eurasian Hobby(Falco subbuteo Linnaeus, 1758)

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Avian Research 2018年第1期9卷 33-42页

作者： Lyubov Malinovskaya elena shnaider Pavel Borodin Anna Torgasheva Institute of Cytology and Genetics Russian Academy of Sciences Siberian Department Novosibirsk Russia 630090. Novosibirsk State University Novo- sibirsk Russia 630090 Bird of Prey Rehabilitation Centre Novosibirsk Russia 630090

Background: Meiotic recombination is an important source of genetic *** on mammals demonstrate a substantial interspecies variation in overall recombination rate, which is dependent mainly on chromosome(2 n) and chromosome arm number(FN).Bird karyotypes are very conservative with 2 n being about 78–82 and FN being 80–90 in most ***, some families such as Apodidae(swifts) and Falconidae(falcons) show a substantial karyotypic *** this study, we describe the somatic and pachytene karyotypes of the male Common Swift(Apus apus) and the pachytene karyotype of the male Eurasian Hobby(Falco subbuteo) and estimate the overall number and distribution of recombination events along the chromosomes of these ***: The somatic karyotype was examined in bone marrow *** chromosome spreads were prepared from spermatocytes of adult *** complexes and mature recombination nodules were visualized with antibodies to SYCP3 and MLH1 proteins ***: The karyotype of the Common Swift consists of three metacentric, three submetacentric and two telocentric macrochromosomes and 31 telocentric microchromosomes(2 n = 78; FN = 90).It differs from the karyotypes of related Apodidae species described *** karyotype of the Eurasian Hobby contains one metacentric and 13 telocentric macrochromosomes and one metacentric and ten telocentric microchromosomes(2 n = 50; FN = 54) and is similar to that described previously in 2 n, but differs for macrochromosome *** an about 40% difference in 2 n and FN, these species have almost the same number of recombination nodules per genome: 51.4 ± 4.3 in the swift and 51.1 ± 6.7 in the *** distribution of the recombination nodules along the macrochromosomes was extremely polarized in the Common Swift and was rather even in the Eurasian ***: This study adds two more species to the short list of birds in which the number and distribut

关键词： Avian chromosomes Recombination nodules Synaptonemal complex MLH1 SYCP3 Crossingover

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