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GrainGenes Reference Report: CRS-23-91

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Reference
CRS-23-91
Title
Chromosomal location of genes for resistance to greenbug in 'Largo'and 'Amigo' wheats.
Journal
Crop Science
Year
1983
Volume
23
Pages
91-93
Author
Hollenhorst MM
Joppa LR
Type
Article
Abstract
The greenbug (Schizaphis graminum Rondani) causes significant economic losses to wheat, oats, barley, and sorghum. Genetic resistance to the greenbug recently has been identified in the germplasm lines 'Amigo' (Triticum aestivum L.) and 'Largo' (Triticum turgidum x T. tauschii) hexaploid wheats. Amigo has a single dominant gene transferred from rye (Secale cereale L.), and Largo is an amphiploid of 'Langdon' durum (T. turgidum L.) and T. tauschii (Coss.) Schmal. Crosses between Largo and Amigo indicated that each parent has a single independent gene for resistance to greenbug biotype C. A set of 'Chinese Spring' monosomics were used to determine the chromosomal location of the resistance genes in Amigo and Largo. The F2 plants from monosomic F1s were grown to the two to three leaf stage in 12-cm-pots or in flats and infested with greenbug biotype C. We found that the gene in Amigo is located in chromosome 1A and the gene in Largo is located on chromosome 7D. Chromosome pairing data from crosses between the Chinese Spring monosomics and Amigo indicated that Amigo differs from Chinese Spring by two reciprocal translocations which involve chromosomes 6A, 6B, 7A, and 7B.
External Databases
https://doi.org/10.2135/cropsci1983.0011183X002300010026x
Germplasm
AMIGO
Gene Catalogue Number
393
Cited in
ReferenceMcIntosh RA et al. (1995) Catalogue of gene symbols for wheat. Proceedings of the 8th International Wheat Genetics Symposium 1333-1500.

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