NDLI: Genetic and physical mapping of the S$_{H}$3 region that confers resistance to leaf rust in coffee tree (Coffea arabica L.)

Content Provider	Springer Nature Link
Author	Lashermes, Philippe Combes, Marie Christine Ribas, Alessandra Cenci, Alberto Mahé, Laetitia Etienne, Hervé
Copyright Year	2010
Abstract	Resistance to coffee leaf rust is conferred by S$_{H}$3, a major dominant gene that has been introgressed from a wild coffee species Coffea liberica (genome L) into the allotetraploid cultivated species, Coffea arabica (genome C$^{a}$E$^{a}$). As the first step toward the map-based cloning of the S$_{H}$3 gene, using a bacterial artificial chromosome (BAC) library, we describe the construction of a physical map in C. arabica spanning the resistance locus. This physical map consists in two homeologous BAC-contigs of 1,170 and 1,208 kb corresponding to the subgenomes C$^{a}$ and E$^{a}$, respectively. Genetic analysis was performed using a single nucleotide polymorphism detection assay based on Sanger sequencing of amplicons. The C. liberica-derived chromosome segment that carries the S$_{H}$3 resistance gene appeared to be introgressed on the sub-genome C$^{a}$. The position of the S$_{H}$3 locus was delimited within an interval of 550 kb on the physical map. In addition, our results indicated a sixfold reduction in recombination frequency in the introgressed S$_{H}$3 region compared to the orthologous region in Coffea canephora.
Starting Page	973
Ending Page	980
Page Count	8
File Format	PDF
ISSN	16142942
Journal	Tree Genetics & Genomes
Volume Number	6
Issue Number	6
e-ISSN	16142950
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-06-08
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Map-based cloning Polyploid SNP Introgression Recombination Coffee Biotechnology Tree Biology Plant Breeding/Biotechnology Plant Genetics & Genomics Forestry
Content Type	Text
Resource Type	Article
Subject	Genetics Molecular Biology Horticulture Forestry

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