RRC ID |
3923
|
著者 |
Endo TR, Nasuda S, Jones N, Dou Q, Akahori A, Wakimoto M, Tanaka H, Niwa K, Tsujimoto H.
|
タイトル |
Dissection of rye B chromosomes, and nondisjunction properties of the dissected segments in a common wheat background.
|
ジャーナル |
Genes Genet Syst
|
Abstract |
The rye B chromosome is a supernumerary chromosome that increases in number in its host by directed postmeiotic drive. Two types of rye B chromosomes that had been introduced into common wheat were dissected into separate segments by the gametocidal system to produce a number of rearranged B chromosomes, such as telosomes, terminal deletions and translocations with wheat chromosomes. A total of 13 dissected B chromosomes were isolated in common wheat, and were investigated for their nondisjunction properties. Rearranged B chromosomes, separated from their B-specific repetitive sequences on the distal part of the long arm, did not undergo nondisjunction, and neither did a translocated wheat chromosome carrying a long-arm distal segment containing the B-specific repetitive sequences. However, such rearranged B chromosomes, missing their B-specific sequences could undergo nondisjunction when they coexisted with the standard B chromosome or a wheat chromosome carrying the B-specific sequences. Deficiencies of the short arm did not completely abolish the nondisjunction properties of the B chromosome, but did reduce the frequency of nondisjunction. These results confirmed previous suggestions that the directed nondisjunction of the rye B chromosome is controlled by two elements, pericentromeric sticking sites and a trans-acting element carried at the distal region of the long arm of the B chromosome. Additionally, it is now shown that the distal region of the long arm of the B chromosome which provides this function is that which carries the B-specific repetitive sequences.
|
巻・号 |
83(1)
|
ページ |
23-30
|
公開日 |
2008-2-1
|
DOI |
10.1266/ggs.83.23
|
PII |
JST.JSTAGE/ggs/83.23
|
PMID |
18379131
|
MeSH |
Chromosomes, Plant*
Cytogenetic Analysis
DNA, Plant / metabolism
Gene Rearrangement
Genes, Plant
Genome, Plant
In Situ Hybridization, Fluorescence
Nondisjunction, Genetic*
Physical Chromosome Mapping
Secale / genetics*
Triticum / genetics*
|
IF |
0.917
|
引用数 |
26
|
WOS 分野
|
GENETICS & HEREDITY
BIOCHEMISTRY & MOLECULAR BIOLOGY
|
リソース情報 |
コムギ |
LPGKU2269(Chinese Spring)
LPGKU2165(Gametocidal 3CSAT)
KT110-001(Ae.cylindrica)? |