Genetic and physical mapping of Lrk10-like receptor kinase sequences in hexaploid oat (Avena sativa L.).
Oat receptor-like kinase gene sequences, homologous to the Lrk10 gene from wheat (Triticum aestivum L.), were mapped in oat (Avena sativa L.). PCR primers designed from the wheat Lrk10 were used to produce ALrk10 from oat. Two DNA sequences, ALrk1A1 and ALrk4A5, were produced from primers designed from coding and noncoding regions of ALrk10. Their use as RFLP probes indicated that the kinase genes mapped to four loci on different hexaploid oat 'Kanota' x 'Ogle' linkage groups (4_12, 5, 6, and 13) and to a fifth locus unlinked to other markers. Three of these linkage groups contain a region homologous to the short arm of chromosome I of wheat and the fourth contains a region homologous to chromosome 3 of wheat. Analysis with several nullisomics of oat indicated that two of the map locations are on satellite chromosomes. RFLP mapping in a 'Dumont' x 'OT328' population indicated that one map location is closely linked to Pg9, a resistance gene to oat stem rust (Puccinia graminis subsp. avenae). Comparative mapping indicates this to be the region of a presumed cluster of crown rust (Puccinia coronata subsp. avenae) and stem rust resistance genes (Pg3, Pg9, Pc44, Pc46, Pc50, Pc68, Pc95, and PcX). The map position of several RGAs located on KO6 and KO3_38 with respect to Lrk10 and storage protein genes are also reported.
Cheng
Davis W
DW
Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, ON, Canada. chengdw@biology.biosci.wayne.edu
Armstrong
Ken C
KC
Tinker
Nick
N
Wight
Charlene P
CP
He
Shan
S
Lybaert
Anissa
A
Fedak
George
G
Molnar
Stephen J
SJ
D018554:Avena / Q000235:genetics*; D001483:Base Sequence; D018744:DNA, Plant; D008969:Molecular Sequence Data; D020161:Physical Chromosome Mapping; D010940:Plant Proteins; D016133:Polymerase Chain Reaction; D012150:Polymorphism, Restriction Fragment Length; D017346:Protein Serine-Threonine Kinases / Q000235:genetics*; D014908:Triticum / Q000235:genetics
D018744:DNA, Plant; D010940:Plant Proteins; D017346:Protein Serine-Threonine Kinases