| Autor: |
Bezant, J- H., Laurie, D. A., Pratchett, N., Chojecki, J., M. J. Kearsey |
| Předmět: |
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| Zdroj: |
Plant Breeding; 5/1/97, Vol. 116 Issue 2, p141-145, 5p |
| Abstrakt: |
A restriction fragment length polymorphism (RFLP) map constructed from 99 doubled haploid lines of a cross between two spring barley varieties ('Blenheim" × 'Kym') was used to map QTL controlling hot water extract and grain nitrogen content (predicted by analysis with near-infrared reflectance spectroscopy). Eight QTL affecting predicted hot water extract were identified by a marker-regression approach. The largest effects were found on chromosomes 3HL, associated with the denso dwarfing gene which is present in 'Blenheim' and conferred poorer predicted hot water extract quality, and 4HL. Other QTL were detected on chromosomes IHS, lHL, 2HS, 2HL, 5HL and 6HS. Analysis of single markers by analysis of variance detected an additional effect on chromosome IH. Eight QTL affecting predicted grain nitrogen content were identified by marker-regression, on chromosomes HIS, IHL, 2HL. 5HS, 6H, 7HS and 7HL. There was also evidence for an additional QTL on chromosome 5HL. The positions of the grain nitrogen content QTL on 5HS and 5HL are comparable to QTL on wheat chromosomes 5 A and 5D that affect grain protein content. The demo gene had no detectable effect on grain nitrogen content. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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