Organization of Genes Conferring Resistance to Anthracnose in Common Bean - Translational Genomics for Crop Breeding: Biotic Stress - page 176

favorable alleles, as absence of recombination
between marker and target locus increases the
diagnostic power and eliminates marker-based
miss-selection. To date, only a limited number
of genes have been isolated for FM development
in common bean, but considerable efforts are
being carried out in bean genomic and transcrip-
tomics. Bean genotypes G19833 and BAT93
have been sequenced ( http://www.phytozome.
net/commonbean_er.php). In consequence,
numerous FM for important traits may become
available over the next decade. Polymorphisms
among alleles for genes of interest may be due
to single nucleotide polymorphisms (SNPs,
CAPs, dCAPS), small insertions or deletions
(Indels), partial or complete loss of the gene,
and on some occasions due to different numbers
of repeat motifs within simple sequence repeats
(SSRs). FM have advantages over other markers
because they are completely linked to the
desired trait allele. The future availability of
FM for anthracnose resistance genes will offer
the opportunity to identify new alleles or other
resistance genes by exploring germplasm,
tagging specific alleles that confer resistance to
anthracnose for use in MAS or genetic analyses,
and through detailed analysis of the molecular
mechanism involving in the response(s) of C.
lindemuthianum to common bean. The present
challenge is to correlate phenotypes with gene
discovery and coding regions at the molecular
level, and to explore the variation and genetic
interaction between genes to further enhance
anthracnose resistance in future bean cultivars
worldwide.

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