To provide and accumulate cytological data for bramble breeding in China, karyotypes of 8 Raspberry cultivars and 7 Blackberry cultivars introduced from foreign countries were investigated in the article. The results ...To provide and accumulate cytological data for bramble breeding in China, karyotypes of 8 Raspberry cultivars and 7 Blackberry cultivars introduced from foreign countries were investigated in the article. The results showed that all the 15 bramble cuitivars were of euploids and no aeuploids were found. All the 8 Raspberry cultivars were found to have 14 chromosomes, and the karyotype formulae of 2n=2x=14=14m, 2n=2x=14=14m (2SAT) and 2n=2x=14=14m (4SAT) were found respectively in 4 cultivars of ‘Algonquin’, ‘Reveille’, ‘Dinkum’ and ‘Ploana’, 3 cultivars of ‘Chilcotin’, ‘Nova’, and ‘Bristol’, and cultivar of ‘Chilliwack’. In the contrast, three various chromosome numbers of 28, 42 and 49 were found in the 7 Blackberry cultivars, their karyotypes formulae were as follows: 2n=4x=28=28m for ‘Arapaho’, ‘Shawnee’ and ‘Navaho’; 2n=6x=42=38m (6SAT) + 4sm for ‘Ollalie’; and 2n=7x=49=49m for ‘Black Butte’, ‘Boysen’ and ‘Kotata’. The karyotypes of all the bramble cultivars,except that of ‘Ollalie’,which was composed of metacentric chromosomes and submetacentric chromosomes and had a karyotype asymmetry type 2A, were composed of metacentric chromosome with type 1A asymmetry. Chromosome numbers of 9 bramble cultivars ‘Algonquin’, ‘Chilcotin’, ‘Reveille’, ‘Chilliwack’, ‘Nova’, ‘Ploana’, ‘Dinkum’, ‘Bristol’ and ‘Black Butte’ and karyotypes of 15 bramble cultivars were reported for the first time.展开更多
文摘To provide and accumulate cytological data for bramble breeding in China, karyotypes of 8 Raspberry cultivars and 7 Blackberry cultivars introduced from foreign countries were investigated in the article. The results showed that all the 15 bramble cuitivars were of euploids and no aeuploids were found. All the 8 Raspberry cultivars were found to have 14 chromosomes, and the karyotype formulae of 2n=2x=14=14m, 2n=2x=14=14m (2SAT) and 2n=2x=14=14m (4SAT) were found respectively in 4 cultivars of ‘Algonquin’, ‘Reveille’, ‘Dinkum’ and ‘Ploana’, 3 cultivars of ‘Chilcotin’, ‘Nova’, and ‘Bristol’, and cultivar of ‘Chilliwack’. In the contrast, three various chromosome numbers of 28, 42 and 49 were found in the 7 Blackberry cultivars, their karyotypes formulae were as follows: 2n=4x=28=28m for ‘Arapaho’, ‘Shawnee’ and ‘Navaho’; 2n=6x=42=38m (6SAT) + 4sm for ‘Ollalie’; and 2n=7x=49=49m for ‘Black Butte’, ‘Boysen’ and ‘Kotata’. The karyotypes of all the bramble cultivars,except that of ‘Ollalie’,which was composed of metacentric chromosomes and submetacentric chromosomes and had a karyotype asymmetry type 2A, were composed of metacentric chromosome with type 1A asymmetry. Chromosome numbers of 9 bramble cultivars ‘Algonquin’, ‘Chilcotin’, ‘Reveille’, ‘Chilliwack’, ‘Nova’, ‘Ploana’, ‘Dinkum’, ‘Bristol’ and ‘Black Butte’ and karyotypes of 15 bramble cultivars were reported for the first time.
