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dc.contributorMiloudi, Nachiten_US
dc.contributorMonneveux, Philippeen_US
dc.contributorTanksley, Steven D.en_US
dc.contributorEarl Sorrells, Marken_US
dc.creatorAutrique, Enriqueen_US
dc.identifier.citationEnrique Autrique, Nachit Miloudi, Philippe Monneveux, Steven D. Tanksley, Mark Earl Sorrells. (1/6/1996). Genetic Diversity in Durum Wheat Based on RFLPs, Morphophysiological Traits, and Coefficient of Parentage. Crop Science, 36 (3), pp. 735-742.en_US
dc.description.abstractEstimation of genetic diversity present in gene pools is an important determination for breeding programs. This study was conducted to determine the level of variation in durum wheat cultivars (Triticum turgidum L. var durum) based on different measures. Genetic diversity in durum wheat was measured in a collection of 113 improved cultivars and landraces of diverse ecogeographical origin by means of restriction fragment length polymorphism (RFLP), morphophysiological traits, and coefficient of parentage (COP). Thirty-nine clones and a single restriction enzyme were used to measure the RFLP-based genetic distance. Average taxonomic distances were calculated for the morphophysiological traits evaluated in four location-years. Lower genetic distances were observed for both RFLP and morphophysiological traits for the improved cultivars and for some landraces from Morocco and Jordan, while genetic distances were larger for the rest of the landraces. Patterns of variation for morphophysiological traits were associated with days to heading, plant height, and harvest index. Landraces contained 99% of the total fragments observed in the pool oi improved varieties and showed 13% unique fragments. Coefficient of parentage analysis revealed 15 ancestral lines that contributed 72% of the genetic make up of improved cultivars. Thirty-nine different ancestors contributed to the remaining 28%. Correlation of distances based on different measures was higher for average taxonomic distance and Nei's genetic distance (r = 0.47) while COP relationship with the other two measures was lower. Narrower genetic diversity in breeding lines based on the measures used, suggests the utilization of other sources of variation.en_US
dc.rightsCopyrighted; all rights reserveden_US
dc.sourceCrop Science;36,(1996) Pagination 735,742en_US
dc.subjectphenotypic diversityen_US
dc.subjectgenetic diversityen_US
dc.subjectpedigree analysisen_US
dc.subjectworld collectionen_US
dc.subjectDurum Wheaten_US
dc.titleGenetic Diversity in Durum Wheat Based on RFLPs, Morphophysiological Traits, and Coefficient of Parentageen_US
dc.typeJournal Articleen_US
cg.subject.agrovocdurum (triticum durum)en_US
cg.contributor.centerAdvanced Technology Center - CIATEQen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerCornell University - CORNELLen_US
cg.contributor.centerFrench National Institute for Agricultural Research, Ecole Nationale Superieure Agronomique de Montpellier - ENSA‐INRAen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.regionWestern Asiaen_US
cg.coverage.regionNorthern Africaen_US
dc.identifier.statusTimeless limited accessen_US

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