Inheritance study and linkage mapping of resistance loci to Hemileia vastatrix in Híbrido de Timor UFV 443-03.

Coffee leaf rust (CLR) caused by Hemileia vastatrix Berk. et Br. is one of the major Coffea arabica diseases world-wide. CLR resistance has been attributed to at least nine dominant genes, as single or in combination. We present an inheritance study and mapping loci involved in the Híbrido de Timor (HDT) UFV 443-03 resistance to race I, race II, and pathotype 001 of H. vastatrix . Molecular markers were used to ascertain the phenotypic results and to map the putative resistance loci. For all tree isolates, the inheritance study indicated that the resistance of HDT UFV 443-03 is conditioned by two independent dominant loci or by three independent loci (two dominant and one recessive). Molecular marker analyses ascertained that the resistance of HDT UFV 443-03 to race II is conditioned by at least two independent dominant loci, while the resistance to race I and pathotype 001 is conditioned by at least four independent dominant loci. Gene pyramiding might result in a cultivar with durable resistance; however, it is Difficult to distinguish between plants with one or more resistance genes due to epistatic effects. Molecular markers linked to these genes were indicated for marker-assisted selection, as it is an efficient breeding alternative for CLR resistance with no such epistatic effects.

Bibliographic Details

Main Authors:	PESTANA, K. N., CAPUCHO, A. S., CAIXETA, E. T., ALMEIDA, D. P. de, ZAMBOLIM, E. M., CRUZ, C. D., ZAMBOLIM, L., PEREIRA, A. A., OLIVEIRA, A. C. B. de, SAKIYAMA, N. S.
Other Authors:	KÁTIA NOGUEIRA PESTANA, BIOAGRO; ALEXANDRE SANDRI CAPUCHO, Universidade Federal do Vale do São Francisco; EVELINE TEIXEIRA CAIXETA, SAPC; DÊNIA PIRES DE ALMEIDA, BIOAGRO; EUNIZE MACIEL ZAMBOLIM, BIOAGRO; COSME DAMIÃO CRUZ, UFV; LAÉRCIO ZAMBOLIM, UFV; ANTÔNIO ALVES PEREIRA, SAPC; ANTONIO CARLOS BAIAO DE OLIVEIRA, SAPC; NEY SUSSUMU SAKIYAMA, UFV.
Format:	Artigo de periódico biblioteca
Language:	English eng
Published:	2016-03-07
Subjects:	Leaf rust, Breeding, Chromosome mapping, Quantitative trait loci,
Online Access:	http://www.alice.cnptia.embrapa.br/alice/handle/doc/1039824
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