RFLP maps
Several maps based on DNA markers (mostly RFLPs) now exist that include chromosome 1.
Heun et al. Genome 34:437-447 (1991) Proctor x Nudinka map
Kleinhofs et al. Theor Appl Genet 86:705-712 (1993) Steptoe x Morex map
Kleinhofs et al. Barley Genetics Newsletter 23:79-83 (1993) Steptoe x Morex map update
Hayes et al. Theor Appl Genet 87:392-401 Steptoe x Morex QTLs
Hayes et al. Barley Genetics Newsletter 23:98-143 (1993) Steptoe x Morex QTLs
Han et al. Barley Genetics Newsletter 23:84-97 (1993) Steptoe x Morex malting QTLs
Kasha et al. Barley Genetics Newsletter 23:65-69 (1993) Harrington x TR306 map
Tinker et al. Barley Genetics Newsletter 23:72-78 (1993) Harrington x TR306 QTLs
Graner et al. Theor Appl Genet 83:250-256 (1991) Igri x Franka map
Graner et al. Theor Appl Genet 83:250-256 (1991) Vada x Hordeum spontaneum
Graner et al. Barley Genetics Newsletter 23:53-59 (1993) Igri x Franka map update
Backes et al. Barley Genetics Newsletter 23:60-64 (1993) Igri x Danilo QTLs
Giese et al. Hereditas 120:267-273 (1994) Alf x Vogelsanger Gold map
Comparative maps
Mapping using common RFLP probes shows that chromosomes of barley can be aligned with those of other grasses. Barley chromosome 1 aligns witth the group 7 chromosomes of wheat and is being aligned with other species. For example, the regions of maize chromosome 9 and rice chromosome 6 that have the waxy gene line up with the short arm of the wheat group 7 chromosomes and barley chromosome 1 (7H). Comparative mapping approach is going to useful as it will reveal interesting biology across the grasses. Most maps do not yet have enough common markers to allow easy alignment, but this will come. See;
Devos et al. Relationship between chromosome 9 of maize and wheat homoeologous group 7 chromosomes. Genetics 138:1287-1292 (1994).
Kurata et al. Conservation of genome structure between rice and wheat. BioTechnology 12:276-278 (1994).
Kurata et al. A 300 kilobase interval genetic map of rice including 883 expressed sequences. Nature Genetics 8:365-372 (1994).
Causse et al. Saturated molecular map of the rice genome based on an interspecific backcross population. Genetics 138:1251-1274 (1994).
Namuth et al. Comparative RFLP mapping of Hordeum vulgare and Triticum tauschii. Theor Appl Genet 89:865-872 (1994).
Physical maps
Leitch and Heslop-Harrison (Genome 36:517-523 (1993)) and Fukui et al. (Genome 37:105-111 (1994)) both show a 5S rDNA site on the short arm. The former paper also locates 18S-5.8S-26S (NOR) sequences on the short arm and amylase sequences (Amy2) on the long arm. The Amy2 locus on the genetic map is close to the centromere (see Kleinhofs et al. Theor Appl Genet 86:705-712 (1993), but physically it is 70% of the way along the arm. The minor NOR site was also mapped by Pedersen and Linde-Laursen (Chromosome Research 2:65-71 (1994)).
Apologies to anyone I've missed out. Please send any contributions for next year to me at the above address, or EMail LAURIED@BBSRC.AC.UK