Herramientas para un programa de mejoramiento genético del guayabo (Psidium guajava L.) en Cuba
Tools for a genetic breeding programfor guava (Psidium guajava L.) in Cuba. Theobjective of this work is to develop a genetic improvement program for guava (Psidium guajavaL.) in Cuba, which may contribute to a moreefficient use of its genetics resources. It beginswith the establishment of the colle...
|Main Authors:||Valdés Infante, Juliette, Nerdo Rodríguez, Narciso, Velásquez, Josefa Bárbara, Sourd, Darío Gaspar, González, Gonzalo, Rodríguez, Julio Alberto, Rohde, Wolfgang|
Tools for a genetic breeding programfor guava (Psidium guajava L.) in Cuba. Theobjective of this work is to develop a genetic improvement program for guava (Psidium guajavaL.) in Cuba, which may contribute to a moreefficient use of its genetics resources. It beginswith the establishment of the collection, takinginto account the prospection of native genotypes,as well as the introduction of wild relatives and accessions with a diverse geographical originfrom the main producer countries. These activitiesare vital for the posterior collection enrichmentand maintenance, as well as the different sexualand asexual propagation procedures, whichguarantee material multiplication and allow tocreate new variability sources. Once established,characterization can proceed. For this, a groupof minimum descriptors that can be useful tohomogenize such studies to an international leveland for cultivar catalogues confection are referredto, the latter of great demand from producers andspecialists. For a rational germplasm managementit is necessary to know the existent variability. Inthis sense, highly discriminative morphologicalcharacters, as well as AFLP and SSR molecular markers, are recommended, whose combinationallows to identify accessions and to form diversity groups, not only in guava but also in other Myrtaceae members. All this integral analysisguarantees a more efficient selection processof promissory genotypes for different purposes (breeding, conservation and commercialization).From them, crosses that can serve to evaluatehybrids with desirable commercial characteristicsare recommended, as well as the development of agenetic linkage map and QTLs association, as thea step towards a future marker-assisted selection implementation. The role of tissue culture is also stressed, as an alternative conservation method and for guava improvement, considering the mainresults obtained in the country.