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)?