NDLI: Molecular cytogenetic characteristics of a translocation line between common wheat and Thinopyrum intermedium with resistance to powdery mildew

Content Provider	Springer Nature Link
Author	Tang, Xueqin Shi, Dong Xu, Jie Li, Yinglu Li, Wenjing Ren, Zhenglong Fu, Tihua
Copyright Year	2014
Abstract	Powdery mildew caused by Blumeria graminis (DC) Speer f. sp. tritici Em. Marchal is a serious disease of wheat (Triticum aestivum L.) in Southwestern China. A line of common wheat designated 08-723 isolated from the progeny of a hybrid between common wheat and Thinopyrum intermedium (Host) Barkworth & Dewey, was highly resistant to the existing powdery mildew races in the region. This line had a similar phenotype to its wheat parent, and it showed normal bivalent pairing at metaphase I of meiosis. It was analyzed by genomic in situ hybridization, fluorescence in situ hybridization and sequential C-banding-GISH to determine the amount, location and origin of the alien chromatin present. The results revealed that line 08-723 is homozygous for a two-point translocation replacing chromosome 6A of wheat. The translocation chromosome appears to have a normal 6AL arm; its short arm has a short terminal segment of ca. 10 % in length originating from an unidentified B-genome chromosome of wheat and a long proximal segment of ca. 90 % of the arms’ length originating from one of the St-genome chromosomes of Th. intermedium. Genetic analysis of powdery mildew resistance in F1, F2 and F2:3 populations from a cross of 08-723 with a susceptible wheat line indicated that the resistance was controlled by a single dominant gene and in a sample of F2 plants it always associated with the translocated chromosome. The gene responsible for resistance on the translocated chromosome may provide an alternate source of resistance in wheat breeding programs.
Starting Page	201
Ending Page	210
Page Count	10
File Format	PDF
ISSN	00142336
Journal	Euphytica
Volume Number	197
Issue Number	2
e-ISSN	15735060
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-01-19
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Double translocation ISH Powdery mildew resistance Sequential C-banding-GISH Thinopyrum intermedium Plant Sciences Plant Genetics & Genomics Plant Pathology Plant Physiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Horticulture Agronomy and Crop Science

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