Alteration of Terminal Heterochromatin and Chromosome Rearrangements in Derivatives of Wheat-Rye Hybrids

作     者：Shulan Fu Zhenling Lv Xiang Guo Xiangqi Zhang Fangpu Han 

作者机构：State Key Laboratory of Plant Cell and Chromosome EngineeringInstitute of Geneticsand Developmental BiologyChinese Academy of Sciences Key Laboratory of Plant Breeding and GeneticsSichuan Agriculture University 

出 版 物：《Journal of Genetics and Genomics》 (遗传学报（英文版）)

年 卷 期：2013年第40卷第8期

页      面：413-420页

核心收录：

学科分类：0710[理学-生物学] 1001[医学-基础医学(可授医学、理学学位)] 07[理学] 09[农学] 071007[理学-遗传学] 0901[农学-作物学] 090102[农学-作物遗传育种] 

基　　金：supported by the grants of the National High Technology Research and Development Program("863"Program) of China(No.2011AA100101) the Special Financial Grant from the China Postdoctoral Science Foundation (No.2012T50157),and 2011 Collaborative Innovation Plan of the Ministry Of Education of China 

主　　题：Wheat-Rye addition lines Chromosome rearrangements Multiple centromeres Minichromosomes Heterochromatin 

摘      要：Wheat-rye addition and substitution lines and their self progenies revealed variations in telomeric heterochromatin and centromeres, Furthermore, a mitotically unstable dicentric chromosome and stable multicentric chromosomes were observed in the progeny of a Chinese Spring-lmperial rye 3R addition line. An unstable multicentric chromosome was found in the progeny of a 6R/6D substitution line. Drastic variation of terminal heterochromatin including movement and disappearance of terminal heterochromatin occurred in the progeny of wheat- rye addition line 3R, and the 5RS ditelosomic addition line. Highly stable minichromosomes were observed in the progeny ofa monosomic 4R addition line, a ditelosomic 5RS addition line and a 6R/6D substitution line. Minichromosomes, with and without the FISH signals for telomeric DNA （TTTAGGG）n, derived from a monosomic 4R addition line are stable and transmissible to the next generation. The results indicated that centromeres and terminal heterochromatin can be profoundly altered in wheat-rye hybrid derivatives.