Physical analysis of the complex rye (Secale cereale L.) Alt4 aluminium (aluminum) tolerance locus using a whole-genome BAC library of rye cv. Blanco - B.-J. Shi; J. P. Gustafson; J. Button; J. Miyazaki; M. Pallotta; N. Gustafson; H. Zhou; P. Langridge; N. C. Collins (Theoretical and Applied Genetics, 2009)