Title:	High-density genetic mapping for coffee leaf rust resistance.
Authors:	DIOLA, V. BRITO, G. G. de CAIXETA, E. T. MACIEL-ZAMBOLIM, E. SAKIYAMA, N. S. LOUREIRO, M. E.
Affiliation:	Universidade Federal Rural do Rio de Janeiro; GIOVANI GREIGH DE BRITO, CNPA; EVELINE TEIXEIRA CAIXETA, SAPC; BIOCAFÉ/BIOAGRO; BIOCAFÉ/BIOAGRO; Universidade Federal de Viçosa.
Date Issued:	2011
Citation:	Tree Genetics & Genomes, v. 7, n. 6, p. 1199-1208, Dec. 2011.
Description:	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.
Thesagro:	Coffea Arábica Hemileia Vastatrix
Keywords:	Dominant resistance gene High-density genetic map
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (SAPC)