Data/hora: 23/06/2024 23:27:41

Biblioteca(s): | Embrapa Café.
Data corrente: | 06/10/2011
Data da última atualização: | 13/10/2016
Autoria: | DIOLA, V.; BRITO, G. G. de; CAIXETA, E. T.; MACIEL-ZAMBOLIM, E.; SAKIYAMA, N. S.; LOUREIRO, M. E.
Afiliação: | Universidade Federal Rural do Rio de Janeiro; GIOVANI GREIGH DE BRITO, CNPA; EVELINE TEIXEIRA CAIXETA, SAPC; BIOCAFÉ/BIOAGRO; BIOCAFÉ/BIOAGRO; Universidade Federal de Viçosa.
Título: | High-density genetic mapping for coffee leaf rust resistance.
Ano de publicação: | 2011
Fonte/Imprenta: | Tree Genetics & Genomes, v. 7, n. 6, p. 1199-1208, Dec. 2011.
Idioma: | Inglês
Conteúdo: | 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.
Palavras-Chave: | Dominant resistance gene; High-density genetic map.
Thesagro: | Coffea Arábica; Hemileia Vastatrix.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/42966/1/High-density-genetic.pdf
Registro original: | Embrapa Café (CNPCa)
Exemplares: | CNPCa - (241-1) - UPC - AP - DD -  -  -  - DIS