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dc.contributorCeccarelli, Salvatoreen_US
dc.contributorGrando, Stefaniaen_US
dc.creatorSingh, Murarien_US
dc.identifier.citationSalvatore Ceccarelli, Stefania Grando. (1/10/1999). Genotype x environment interaction of crossover type: detecting its presence and estimating the crossover point. TAG Theoretical and Applied Genetics, 99, pp. 988-995.en_US
dc.description.abstractGenotype-environment interaction (GEI) introduces inconsistency in the relative rating of genotypes across environments and plays a key role in formulating strategies for crop improvement. GEI can be either qualitative (i.e., crossover type) or only quantitative (i.e., noncrossover type). Since the presence of crossover-type interaction has a strong implication for breeding for specific adaptation, it is important to assess the frequency of crossover interactions. This paper presents a test for detecting the presence of crossover-type interaction using the response-environment relationship and enumerates the frequency of crossovers and estimation of the crossover point (CP) on the environment axis, which serves as a cut-off point for the two environments groups where different/specific selections can be made. Sixty-four barley lines with various selection histories were grown in northern Syria and Lebanon giving a total of 21 environments (location-year combinations). Linear regression of the genotypic response on the environmental index represented a satisfactory model? and heterogeneity among regressions was significant. At a 5% level of significance, 38% and 19% of the pairs showed crossover interactions when the error variances were considered heterogeneous and homogeneous, respectively, implying that an appreciable number of crossovers took place in the case of barley Lines responding to their environments. The CP of 1.64 t/ha, obtained as the CP of regression lines between the genotype numbers: 19 and 31, provided maximum genotype x environment-group interaction. Across all environments, genotype nos. 59 and 12 stood first and second for high yield, respectively. The changes in the ranks of genotypes under the groups of environments can be used for selecting specifically adapted genotypes.en_US
dc.publisherSpringer (part of Springer Nature)en_US
dc.sourceTAG Theoretical and Applied Genetics;99,Pagination 988-995en_US
dc.subjectgenotype x environment interactionen_US
dc.subjectcrossover pointen_US
dc.subjectcrossover genotype-environment interactionen_US
dc.subjectlinear regression modelen_US
dc.titleGenotype x environment interaction of crossover type: detecting its presence and estimating the crossover pointen_US
dc.typeJournal Articleen_US
cg.creator.idSingh, Murari: 0000-0001-5450-0949en_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_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.isijournalISI Journalen_US
dc.identifier.statusTimeless limited accessen_US
cg.journalTAG Theoretical and Applied Geneticsen_US

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