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Selection of interspecific Psidium spp. hybrids resistant to Meloidogyne enterolobii Agronomy
Ribeiro, Rodrigo Moreira; Martins Gomes, Vicente; Pio Viana, Alexandre; Moreira Souza, Ricardo; Santos, Paulo Ricardo dos.
Since 2001, the disease known as 'guava decline', resulting from the interaction between the phytonematode Meloidogyne enterolobii and the fungus Fusarium solanie, has caused direct and indirect economic losses to the entire guava production chain. Given the lack of sources of resistance in guava genotypes, interspecific hybrids of Psidium spp. were obtained for resistance to the nematode M. enterolobii. To classify the level of resistance of the interspecific hybrids, we evaluated the plant classification methodologies proposed by Oostenbrink (1966) and Moura and Régis (1987). Estimates of genetic parameters were obtained using the REML/BLUP approach. Interspecific hybrids resistant to M. enterolobii were selected that can be used as rootstocks or in new...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mixed models; Genotypic values; Genetic resistance; Psidium guajava.
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42702
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History of northern corn leaf blight disease in the seventh cycle of recurrent selection of an UENF-14 popcorn population Agronomy
Ribeiro, Rodrigo Moreira; Amaral Júnior, Antônio Teixeira; Pena, Guilherme Ferreira; Vivas, Marcelo; Kurosawa, Railan Nascimento; Gonçalves, Leandro Simões Azeredo.
To investigate the genetic resistance to northern corn leaf blight (Exserohilum turcicum) disease in the UENF-14 popcorn population and the inclusion of this trait in the analysis, two hundred ten popcorn half-sib families were evaluated using an incomplete block design with treatments arranged in replicates "Sets". Regarding the Families within "Set" (F/S) source of variation, enough genetic variability was found for northern corn leaf blight disease resistance to be explored in the next cycles of the UENF popcorn breeding program. The open-pollinated UENF-14 variety has a source of resistance to this disease in its genetic basis, given that it originated from crossing with an American cultivar with yellow grains that is resistant to disease. These...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genética e melhoramento Exserohilum turcicum; Half-sib families; Zea mays. Genética e melhoramento.
Ano: 2016 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30573
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