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Titolo:
Molecular genetic maps in wild emmer wheat, Triticum dicoccoides: Genome-wide coverage, massive negative interference, and putative quasi-linkage
Autore:
Peng, J; Korol, AB; Fahima, T; Roder, MS; Ronin, YI; Li, YC; Nevo, E;
Indirizzi:
Univ Haifa, Inst Evolut, IL-31905 Haifa, Israel Univ Haifa Haifa Israel IL-31905 fa, Inst Evolut, IL-31905 Haifa, Israel
Titolo Testata:
GENOME RESEARCH
fascicolo: 10, volume: 10, anno: 2000,
pagine: 1509 - 1531
SICI:
1088-9051(200010)10:10<1509:MGMIWE>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
FRAGMENT-LENGTH-POLYMORPHISM; CROSSOVER INTERFERENCE; HOMOEOLOGOUS GROUP-2; ALLOZYME GENOTYPES; PREDICTIVE METHOD; RUST RESISTANCE; RFLP ANALYSIS; AFLP MARKERS; RICH REGIONS; DURUM-WHEAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
81
Recensione:
Indirizzi per estratti:
Indirizzo: Nevo, E Inst Plant Genet & Crop Plant Res, D-06466 Gatersleben, Germany Inst Plant Genet & Crop Plant Res Gatersleben Germany D-06466 ny
Citazione:
J. Peng et al., "Molecular genetic maps in wild emmer wheat, Triticum dicoccoides: Genome-wide coverage, massive negative interference, and putative quasi-linkage", GENOME RES, 10(10), 2000, pp. 1509-1531

Abstract

The main objectives of the study reported here were to construct a molecular map of wild emmer wheat, Triticum dicoccoides, to characterize the marker-related anatomy of the genome, and to evaluate segregation and recombination patterns upon crossing T. dicoccoides with its domesticated descendant Triticum durum (cultivar Langdon). The total map length exceeded 3000 cM and possibly covered the entire tetraploid genome (AABB). Clusters of molecular markers were observed on most of the 14 chromosomes. AFLP (amplified fragment length polymorphism) markers manifested a random distribution among homologous groups, but not among genomes and chromosomes. Genetic differentiation between T. dicoccoides and T. durum was attributed mainly to the B genome as revealed by AFLP markers. The segregation distorted markers were mainly clustered on 4A, SA, and 5B chromosomes. Homeoalleles, differentially conferring the vigor of gametes, might be responsible for the distortion on5A and 5B chromosomes. Quasilinkage, deviation from free recombination between markers of nonhomologous chromosomes, was discovered. Massive negativeinterference was observed in most of the chromosomes (an excess of double crossovers in adjacent intervals relative to the expected rates on the assumption of no interference). The general pattern of distribution of islands of negative interference included near-centromeric location, spanning the centromere, and median/subterminal location.

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Documento generato il 25/09/20 alle ore 09:04:10