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Title of Journal: Mol Breeding

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Abbravation: Molecular Breeding

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Springer Netherlands

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DOI

10.1007/978-3-540-74769-7_57

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ISSN

1572-9788

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Markerassisted selection provides arabica coffee

Authors: Emilly Ruas Alkimim Eveline Teixeira Caixeta Tiago Vieira Sousa Antônio Alves Pereira Antonio Carlos Baião de Oliveira Laércio Zambolim Ney Sussumu Sakiyama
Publish Date: 2017/01/04
Volume: 37, Issue: 1, Pages: 6-
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Abstract

Selecting superior genotypes is facilitated by markerassisted selection MAS which is particularly suitable for transferring disease resistance alleles because it nullifies environmental effects and allows selection of resistant individuals in the absence of the pathogen or race enabling preventive breeding Molecular markers linked to two major genes SH3 and SH conferring resistance to coffee rust and those linked to the Ck1 gene conferring resistance to coffee berry disease CBD have previously been identified These markers were validated and used in a progeny of crosses between Indian selections with Coffea arabica cultivars Eleven resistant individuals homozygous for SH3 were identified by MAS Of these seven carry SH from Híbrido de Timor and the gene introduced from Coffea liberica SH3 SH was characterized as derived from Coffea canephora Thus it was possible to identify C arabica genotypes carrying important genes for rust resistance introgressed from other coffee species MAS also allowed identification of sources of CBD resistance for use in preventive breeding for resistance to this serious disease Using two validated molecular markers two coffee plants carrying Ck1 were identified the UFV 32860 genotype F2 was resistant and homozygous based on both molecular markers but exhibited no markers related to SH3 and SH and the UFV 31712 genotype F1 was resistant and homozygous but resistant and heterozygous based on CBDSat207 and CBDSat235 respectively Along with possessing Ck1 the latter carries SH Overall plants carrying different genes for resistance to rust and CBD were identified These plants are important sources for gene pyramiding in breeding programs aimed at multiple and durable resistanceThis work was financially supported by the Brazilian Coffee Research and Development Consortium Consórcio Brasileiro de Pesquisa e Desenvolvimento do Café–CBPD/Café by the Foundation for Research Support of the State of Minas Gerais FAPEMIG by the National Council of Scientific and Technological Development CNPq and by the National Institutes of Science and Technology of Coffee INCT/Café

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