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Titolo:
Microsatellite tagging of the stripe-rust resistance gene YrH52 derived from wild emmer wheat, Trificum dicoccoides, and suggestive negative crossover interference on chromosome 1B
Autore:
Peng, JH; Fahima, T; Roder, MS; Li, YC; Dahan, A; Grama, A; Ronin, YI; Korol, AB; Nevo, E;
Indirizzi:
Univ Haifa, Inst Evolut, IL-31905 Haifa, Israel Univ Haifa Haifa Israel IL-31905 fa, Inst Evolut, IL-31905 Haifa, Israel Inst Plant Genet & Crop Plant Res, D-06466 Gatersleben, Germany Inst PlantGenet & Crop Plant Res Gatersleben Germany D-06466 n, Germany Agr Res Org, Volcani Ctr, IL-50250 Bet Dagan, Israel Agr Res Org Bet Dagan Israel IL-50250 ni Ctr, IL-50250 Bet Dagan, Israel
Titolo Testata:
THEORETICAL AND APPLIED GENETICS
fascicolo: 6-7, volume: 98, anno: 1999,
pagine: 862 - 872
SICI:
0040-5752(199905)98:6-7<862:MTOTSR>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRITICUM-AESTIVUM L; YELLOW RUST; ALLOZYME GENOTYPES; PREDICTIVE METHOD; POWDERY MILDEW; BREAD WHEAT; LEAF RUST; SEL G-25; MARKERS; RECOMBINATION;
Keywords:
genetic mapping; microsatellite marker; stripe-rust resistance; Puccinia striiformis; negative crossover interference; Triticum dicoccoides; wild emmer wheat;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
55
Recensione:
Indirizzi per estratti:
Indirizzo: Nevo, E Univ Haifa, Inst Evolut, Mt Carmel, IL-31905 Haifa, Israel Univ Haifa Mt Carmel Haifa Israel IL-31905 IL-31905 Haifa, Israel
Citazione:
J.H. Peng et al., "Microsatellite tagging of the stripe-rust resistance gene YrH52 derived from wild emmer wheat, Trificum dicoccoides, and suggestive negative crossover interference on chromosome 1B", THEOR A GEN, 98(6-7), 1999, pp. 862-872

Abstract

Stripe rust caused by Puccinia striiformis West. is one of the most devastating diseases relating to wheat production. Wild emmer wheat. Triticum dicoccoides, the tetraploid progenitor of cultivated wheat, has proven to be avaluable source of novel stripe-rust resistance genes for wheat breeding. For example, T. dicoccoides accessions from Mt. Hermon. Israel. are uniformly and highly resistant to stripe-rust. The main objective of the present study is to map a stripe-rust resistance gene, derived from the unique Mt. Hermon population of wild emmer, using microsatellite markers. An FZ mappingpopulation was established by crossing stripe-rust resistant T. dicoccoides accession H52 from Mt. Hermon with the Triticum durum cultivar Langdon. The stripe-rust resistance derived from accession H52 was found to be controlled by a single dominant gene which was temporarily designated as YrH52. Out of 120 microsatellite markers tested. 109 (91%) showed polymorphism between the parental lines. Among 79 segregating microsatellite loci generated from 56 microsatellite primer pairs: nine were linked to YrH52 with recombination frequencies of 0.02-0.35, and LOD scores of 3.56-54.22. A genetic map of chromosome 1B, consisting of ten microsatellite loci and the stripe-lust resistance gene YrH52, was constructed with a total map length of 101.5 cM. YrH52 is also closely linked to RFLP marker Nor1 with a map distance of1.4 cM and a LOD value of 29.62. Apparent negative crossover interference was observed in chromosome 1B, especially in the region spanning the centromere. Negative crossover interference may be a common characteristic of gene-rich regions or gene clusters in specific chromosomes.

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Documento generato il 21/09/20 alle ore 06:32:57