| RRC ID |
507
|
| 著者 |
Banno Y, Nakamura T, Nagashima E, Fujii H, Doira H.
|
| タイトル |
M chromosome of the wild silkworm, Bombyx mandarina (n = 27), corresponds to two chromosomes in the domesticated silkworm, Bombyx mori (n = 28).
|
| ジャーナル |
Genome
|
| Abstract |
Chromosomes of Bombyx mori (n = 28) and of Bombyx mandarina (n = 27) were studied cytogenetically to resolve the origin of the large M chromosome in the Japaneses type of B. mandarina. In the F1 progeny from the reciprocal cross between B. mandarina and B. mori, the mitotic chromosome number was 2n = 55, and a chromosome configuration of 26 bivalents plus 1 trivalent was observed at metaphase I of germ cells. The trivalent chromosome consisted of the M chromosome from B. mandarina and two chromosomes from B. mori. When males of B. mori were mated to the F1 females, nuclei with two types of chromosome number (2n = 55 and 2n = 56) and two sets of chromosome pairs (26 bivalents plus 1 trivalent versus 28 bivalents) were observed in the metaphase I stage. Linkage analysis showed that the 14th chromosome of B. mori was involved in these two types of chromosome segregation. This result indicates that the M chromosome in B. mandarina arose from a fusion between a chromosome corresponding to the 14th linkage group and another, yet unidentified linkage group.
|
| 巻・号 |
47(1)
|
| ページ |
96-101
|
| 公開日 |
2004-2-1
|
| DOI |
10.1139/g03-112
|
| PII |
g03-112
|
| PMID |
15060606
|
| MeSH |
Animals
Bombyx / genetics*
Chromosome Mapping
Chromosome Segregation / genetics*
Chromosomes / genetics*
Crosses, Genetic
Japan
Karyotyping
|
| IF |
2.037
|
| 引用数 |
18
|
|
WOS 分野
|
BIOTECHNOLOGY & APPLIED MICROBIOLOGY
GENETICS & HEREDITY
|
| リソース情報 |
| カイコ |
B. mori strains |
