TY  - JA
AU  - Dubcovsky,J.
AU  - Antonelli,E.F.
AU  - Echaide,M.
AU  - Lukaszewski,A.J.
AU  - Porter,D.R.
TI  - Molecular characterization of two Triticum speltoides interstitial translocations carrying leaf rust and greenbug resistance genes
SN  - 0011-183X
U1  - 1999-050934 
PY  - 1998///
KW  - America
KW  - Aphididae
KW  - Aphidoidea
KW  - Basidiomycotina
KW  - biochemical polymorphism
KW  - Cell structure
KW  - Chromosomes
KW  - Cytogenetics
KW  - Fungal diseases
KW  - AGROVOC
KW  - Fungi
KW  - Gramineae
KW  - Infectious diseases
KW  - North America
KW  - North central states usa
KW  - Northern plains states usa
KW  - Nucleus
KW  - Pests of plants
KW  - Plant diseases
KW  - Plant genetics and breeding
KW  - NOT IN AGROVOC
KW  - Polymorphism
KW  - Puccinia
KW  - Recombination
KW  - Resistance to injurious factors
KW  - Schizaphis
KW  - Uredinales
KW  - USA
KW  - Triticum
KW  - Genetics
N1  - references US (DNAL 64.8 C883)
N2  - Resistance genes for leaf rust (Puccinia recondita Rob. ex Desm.) and greenbug (Schizaphis graminum Rondani) were transferred from chromosome 7S of Triticum speltoides (Tausch) Gren. to chromosome 7A of hexaploid wheat (Triticum aestivum L.) by means of the ph1b mutation that promotes homeologous recombination. The chromosome segments from T. speltoides were characterized by C-banding and restriction fragment length polymorphisms (RFLP). Since the segments of T. speltoides chromosome 7S do not recombine with wheat chromosome 7A in the presence of the wild-type Ph1 locus only one molecular marker per chromosome segment is required to monitor the introgressed genes in marker assisted selection programs. The new leaf rust resistance gene, designated Lr47, and the greenbug resistance gene Gb5 were located on interstitial chromosome segments from T. speltoides translocated to wheat chromosome arms 7AS and 7AL, respectively. Physically both were located in the distal one third of the arms but genetically the Lr47 segment was 2 to 10 centimorgans (cM) from the centromere and was 20 to 30 cM long; the Gb5 segment was 18 to 22 cM from the centromere and was 40 to 50 cM long
T2  - Crop science (USA). (Nov-Dec 1998). v. 38(6) p. 1655-1660
ER  -