HOME

Welcome to the Bird Chromosome Database (BCD)

The BCD is an open resource that comprises information about chromosome number, karyotype, and the advances obtained by Fluorescent in situ Hybridization (FISH) studies in birds. The main purpose of this database is to retrieve and organize historical/current information regarding avian cytogenetics. Furthermore, it also aims to stimulate the development of new studies in this field.

Analysis of the data available in V.3.0/2022

The new version V3.0/2022 of BCD includes data from chromosomal number of 1079 bird species, and chromosome painting using Gallus gallus (GGA) probes of 123 species.

The percentage of species in each avian order that have available data is shown in table 1.

Table 1: Total number of bird species per order, numbers and percentages of species karyotyped and analyzed with GGA chromosome probes
Order Total number species* Number of species karyotyped % Number of species with WCP data %
Struthioniformes 2 1 50.0% 1 50.0%
Rheiformes 2 2 100.0% 2 100.0%
Apterygiformes 5 1 20.0%
Casuariiformes 4 2 50.0% 2 50.0%
Tinamiformes 47 6 12.8% 1 2.1%
Anseriformes 177 46 26.0% 8 4.5%
Galliformes 300 54 18.0% 16 5.3%
Gaviiformes 5 1 20.0%
Sphenisciformes 18 8 44.4%
Eurypygiformes 2 2 100.0% 1 50.0%
Procellariiformes 147 5 3.4%
Podicipediformes 23 4 17.4%
Phoenicopteriformes 6 3 50.0%
Phaethontiformes 3
Ciconiiformes 19 14 73.7% 2 10.5%
Pelecaniformes 118 35 29.7%
Suliformes 61 6 9.8%
Accipitriformes 266 68 25.6% 12 4.5%
Otidiformes 26 1 3.8%
Mesitornithiformes 3
Cariamiformes 2 2 100.0%
Gruiformes 189 30 15.9% 5 2.6%
Charadriiformes 383 66 17.2% 5 1.3%
Pterocliformes 16 1 6.3%
Opisthocomiformes 1 1 100.0% 1 100.0%
Columbiformes 344 32 9.3% 11 3.2%
Musophagiformes 23 3 13.0%
Cuculiformes 149 12 8.1% 3 2.0%
Strigiformes 243 32 13.2% 3 1.2%
Caprimulgiformes 122 10 8.2%
Apodiformes 481 14 2.9% 3 0.6%
Coliiformes 6 1 16.7%
Trogoniformes 43 2 4.7% 1 2.3%
Leptosomiformes 1
Coraciiformes 177 13 7.3%
Bucerotiformes 74 6 8.1%
Piciformes 445 34 7.6% 2 0.4%
Falconiformes 67 14 20.9% 6 9.0%
Psittaciformes 398 83 20.9% 10 2.5%
Passeriformes 6459 464 7.2% 28 0.4%
Total entries 10.857 1.079 9.9% 123 1.13%

* According to Gill and Donsker [2018]; WCP whole chromosome probes; – no records found.

Frequency of diploid number in birds

The database will be updated regularly and all users are encouraged to contribute to the improvement and spreading of bird cytogenetic information.