01654naa a2200169 a 450000100080000000500110000800800410001910000160006024501290007626000090020552011570021465000140137165000110138565000140139670000200141077300540143018401982025-05-21       1997    bl uuuu     u00u1 u    #d1 aMINELLA, E.  aInheritance and chromosome location of Alp, a gene controlling aluminum tolerance in "Dayton" barley.h[electronic resource]  c1997  aAluminum (Al) toxicity is a major limiting factor in acid soils and more adequate genetic tolerance is needed to improve barley adaptation and production in affected regions. To study the inheritance and chro- mosome location ofthe Alp gene controlling Al tolerance in 'Dayton" barley the primary trisomics of sensitive "Shin Ebisu 16' were crossed to 'Dayton'. Parental, F, and F; seedhngs were grown in nutrient solution containing 0.03, 0.06 and 0.09 mM Al, and classified for tol- erance by haematoxylin staining of the roots. In diploid Fj progeny. Alp was inherited as a single gene, dominant at 0.06 mM and recessive at 0.09 mM concentrations, as indicated by the 3:1 and 1:3 (tolerant: sensitive) segregation ratios, respectively. Segregation of the trisomic F|-derived F2 seedlings at 0.06mM Al deviated significantly from the 3:1 only for the triplo 4/'Dayton' cross. Data for this cross fit the expected trisomic ratios, indicating that the Alp gene is distally located from the centromere on chromosome 4. These results confirm that tolerance is simply inherited, but expression of tolerance is dependent on Al concentration and aliele dose  aAlumínio  aCevada  aGenética1 aSORRELLS, M. E.  tPlant Breeding, Berlingv. 116, p. 465-469, 1997.