High-density genetic mapping for coffee leaf rust resistance.
Coffee leaf rust caused by the fungus Hemileia vastatrix causes considerable economic losses for coffee producers. Although agrochemical products can provide sufficient disease control, the use of resistant cultivars is a safer alternative. This resistance may be constrained by one or a few genetic factors, mainly those found in material originating from interspecific hybrids. In this study, the genetic analysis of an F2 population consisting of 224 plants derived from a crossing of Híbrido de Timor UFV 427-15 (resistant) with Catuaí Amarelo IAC 30 (susceptible) showed that a dominant gene confers the resistance of coffee to race II of H. vastatrix. From a genetic map saturated with 25 amplified fragment length polymorphism (AFLP) markers linked to the resistance gene, we developed a high-density genetic map with six sequence-characterized amplified region (SCAR) markers delimiting a chromosomal region of 9.45 cM and flanking the dominant gene at 0.7 and 0.9 cM. This is the first saturated and high-density genetic map obtained from this region containing the resistance gene. The results of this study are of great importance for the introduction of molecular markers for marker-assisted selection; they will also facilitate studies related to the cloning, structure, and function of race-specific genes involved in the resistance of coffee trees to H. vastatrix.
Main Authors: | DIOLA, V., BRITO, G. G. de, CAIXETA, E. T., MACIEL-ZAMBOLIM, E., SAKIYAMA, N. S., LOUREIRO, M. E. |
---|---|
Other Authors: | Universidade Federal Rural do Rio de Janeiro; GIOVANI GREIGH DE BRITO, CNPA; EVELINE TEIXEIRA CAIXETA, SAPC; BIOCAFÉ/BIOAGRO; BIOCAFÉ/BIOAGRO; Universidade Federal de Viçosa. |
Format: | Artigo de periódico biblioteca |
Language: | English eng |
Published: |
2011-10-06T11:11:11Z
|
Subjects: | Dominant resistance gene, High-density genetic map., Coffea Arábica, Hemileia Vastatrix., |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/902620 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Characterization of the horizontal resistance of coffee (Coffea arabica) to yellow rust (Hemileia vastatrix) in the field and laboratory
by: Paredes Espinosa, Richard, et al. -
Incomplete resistance to coffee leaf rust
by: Eskes, A.B., et al.
Published: (1983) -
Herança da resistência do Híbrido de Timor UFV 443-03 à ferrugem-do-cafeeiro.
by: CAPUCHO, A. S., et al.
Published: (2011-03-16) -
Breeding for Durable Resistance of Arabica Coffee to Coffee Rust (Hemileia vastatrix). Interim consultancy report
by: Eskes, A.B., et al.
Published: (1990) -
Preliminary report on the coffee leaf rust /hemileia vastatrix/ material received from the FAO coffee mission to Ethiopia, 1964-65.
by: BETTENCOURT AJ, et al.
Published: (1968)