Karyotype mosaicism in early generation synthetic hexaploid wheats.

Autor: Luo J; Crop Research Institute, Sichuan Academy of Agricultural Science, Chengdu, Sichuan 610066, P.R. China.; Key Laboratory of Biology and Genetic Breeding in Wheat (Southwest), Ministry of Agriculture, Chengdu, Sichuan 610066, P.R. China., Zhao L; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Sichuan 611130, P.R. China., Zheng J; Crop Research Institute, Sichuan Academy of Agricultural Science, Chengdu, Sichuan 610066, P.R. China.; Key Laboratory of Biology and Genetic Breeding in Wheat (Southwest), Ministry of Agriculture, Chengdu, Sichuan 610066, P.R. China., Li Y; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Sichuan 611130, P.R. China., Zhang L; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Sichuan 611130, P.R. China.; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University at Chengdu, Wenjiang, Sichuan 611130, P.R. China., Liu D; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Sichuan 611130, P.R. China.; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University at Chengdu, Wenjiang, Sichuan 611130, P.R. China., Pu Z; Crop Research Institute, Sichuan Academy of Agricultural Science, Chengdu, Sichuan 610066, P.R. China.; Key Laboratory of Biology and Genetic Breeding in Wheat (Southwest), Ministry of Agriculture, Chengdu, Sichuan 610066, P.R. China., Hao M; Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, Sichuan 611130, P.R. China.; State Key Laboratory of Crop Gene Exploration and Utilization in Southwest China, Sichuan Agricultural University at Chengdu, Wenjiang, Sichuan 611130, P.R. China.
Jazyk: angličtina
Zdroj: Genome [Genome] 2020 Jul; Vol. 63 (7), pp. 329-336. Date of Electronic Publication: 2020 Mar 20.
DOI: 10.1139/gen-2019-0148
Abstrakt: It is known that both the number and the structure of somatic chromosomes can vary in early generation hexaploid wheats. The phenomenon is generally assumed to arise as a result of the meiotic instability characteristic of freshly created allopolyploids. Here, an analysis of the somatic karyotype of a set of 33 early generation synthetic hexaploid wheats has revealed that variation, taking the form of sub-chromosomal fragments and inter-chromosomal translocations, can also arise in somatic tissue. A possible explanation for the observations was that karyotypic instability in early generation hexaploid wheat probably occurs not just during sporogenesis, but also in somatic tissue. However, other factors such as the use of nitrous oxide during the experiments could also cause the chromosome variations, and additional experimentation would be required to determine the most likely.
Databáze: MEDLINE
Externí odkaz: