Dissection of rye B chromosomes, and nondisjunction properties of the dissected segments in a common wheat background

NWIPB OpenIR

	Dissection of rye B chromosomes, and nondisjunction properties of the dissected segments in a common wheat background
	Endo, Takashi Ryu ; Nasuda, Shuhei ; Jones, Neil ; Dou, Quanwen ; Akahori, Atsushi ; Wakimoto, Munenori ; Tanaka, Hiroyuki ; Niwa, Katsumasa ; Tsujimoto, Hishashi
	2008-02-01
发表期刊	GENES & GENETIC SYSTEMS ; Endo Takashi Ryu, Nasuda Shuhei, Jones Neil, Dou Quanwen, Akahori Atsushi,Wakimoto Munenori, Tanaka Hiroyuki,Niwa Katsumasa, Tsujimoto Hishashi.Dissection of rye B chromosomes, and nondisjunction properties of the dissected segments in a common wheat background.GENES & GENETIC SYSTEMS,2008,83(1):23-30
摘要	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.; 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.
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/50695
专题	中国科学院西北高原生物研究所
推荐引用方式 GB/T 7714	Endo, Takashi Ryu,Nasuda, Shuhei,Jones, Neil,et al. Dissection of rye B chromosomes, and nondisjunction properties of the dissected segments in a common wheat background[J]. GENES & GENETIC SYSTEMS, Endo Takashi Ryu, Nasuda Shuhei, Jones Neil, Dou Quanwen, Akahori Atsushi,Wakimoto Munenori, Tanaka Hiroyuki,Niwa Katsumasa, Tsujimoto Hishashi.Dissection of rye B chromosomes, and nondisjunction properties of the dissected segments in a common wheat background.GENES & GENETIC SYSTEMS,2008,83(1):23-30,2008.
APA	Endo, Takashi Ryu.,Nasuda, Shuhei.,Jones, Neil.,Dou, Quanwen.,Akahori, Atsushi.,...&Tsujimoto, Hishashi.(2008).Dissection of rye B chromosomes, and nondisjunction properties of the dissected segments in a common wheat background.GENES & GENETIC SYSTEMS.
MLA	Endo, Takashi Ryu,et al."Dissection of rye B chromosomes, and nondisjunction properties of the dissected segments in a common wheat background".GENES & GENETIC SYSTEMS (2008).