Coffee Breeding
Mostrando 1-12 de 48 artigos, teses e dissertações.
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1. Early induction of orthotropic shoots in Coffea canephora
ABSTRACT In Coffea canephora, the number of orthotropic shoots is directly related to plant yield. The objective of this study was to evaluate the vegetative and yield performance of Coffea canephora, from the botanical variety Conilon, under different management systems for early emission of orthotropic shoots. The experiment was carried out in Ouro Preto d
Rev. Ceres. Publicado em: 2020-08
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2. Multiple resistance to bacterial halo blight and bacterial leaf spot in Coffea spp.*
RESUMO O melhoramento de plantas para resistência genética é um método importante para o manejo de doenças, pelos inúmeros benefícios e baixo custo de implementação. No presente estudo, progênies de 11 espécies de Coffea e 16 acessos selvagens de C. arabica foram testados quanto à resposta a Pseudomonas syringae pv. garcae, agente causal da manch
Arq. Inst. Biol.. Publicado em: 25/11/2019
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3. Selection of conilon coffee clones tolerant to pests and diseases in Minas Gerais
Abstract In the northern Minas region, the dry-warm climate predisposes coffee plants to the occurrence of leaf miners, mites, cercosporiosis, and leaf scald. Aiming for the development of a cultivar adapted to these conditions, Coffea canephora Pierre ex A. Froehner clones were selected through genetic parameters under an irrigated system, without agrochemi
Crop Breed. Appl. Biotechnol.. Publicado em: 31/10/2019
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4. Genótipos de café conilon e sua reação à ferrugem alaranjada
RESUMO O objetivo deste trabalho foi avaliar o comportamento de 54 clones de cafeeiro conilon oriundos do Programa de Melhoramento Genético do Incaper à ferrugem em condições controladas de temperatura e fotoperíodo. Utilizou-se o delineamento inteiramente casualizado com três repetições, sendo cada repetição composta por 16 discos de folha cada, a
Summa phytopathol.. Publicado em: 14/10/2019
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5. Plot size for evaluation of Arabica coffee yield
ABSTRACT. In most cases, in genetic breeding of Arabica coffee, plot size is defined in an empirical manner. It is often based only on the experience of the breeders and the availability of resources, potentially leading to a reduction in precision. Therefore, the aim of this study was to estimate the size of the experimental plot for evaluation of coffee yi
Acta Sci., Agron.. Publicado em: 23/09/2019
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6. Genetic variability in conilon coffee related to grain attributes in an irrigated crop in the Cerrado
Resumo: O objetivo deste trabalho foi quantificar a variabilidade genética de 213 acessos de café conilon, da cultivar Robusta Tropical, quanto às características químicas de qualidade dos grãos de café crus, bem como identificar acessos promissores para o programa de melhoramento do café conilon irrigado no Cerrado. As características químicas ava
Pesq. agropec. bras.. Publicado em: 23/09/2019
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7. Clonal Arabica coffee resistant to Meloidogyne paranaensis and damage threshold on plants development
ABSTRACT: Plants of Coffea arabica Icatu IAC 925 germplasm show resistance to Meloidogyne paranaensis under field conditions, but with variable rates of segregation. One mother plant, IAC 3, of Icatu IAC 925 was evaluated under controlled conditions through the reaction of its clones, obtained by somatic embryogenesis. Reproduction of nematodes in clones wer
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-05
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8. Relationship between meiotic instability and fertility in F2 generation Arabusta coffee plants
ABSTRACT Parental plants, an F1 interspecific hybrid and the F2 generation from Arabusta coffee plants were investigated for meiotic behavior and viability of pollen to understand part of their reproductive biology that affects their possible use in coffee breeding programs. Both parental plants (C. canephora var. Robusta 4x and C. arabica var. dihaploid Bou
Bragantia. Publicado em: 18/04/2019
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9. Selection and genetic parameters for interpopulation hybrids between kouilou and robusta coffee
ABSTRACT Selection of hybrid coffee plants coming from crosses between divergent populations is particularly relevant for the success of breeding programs. This study aimed to outline the best selection strategy in a hybrid population of Coffea canephora var. kouilou and robusta by estimating intrapopulation genetic parameters. Twenty full-sib progenies obta
Bragantia. Publicado em: 11/02/2019
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10. Resistance to bacterial halo blight in Arabica coffee lines derivative from the genotype C1195-5-6-2 under natural infection conditions
Abstract The aim of this study was to identify resistance to bacterial halo blight in Arabica coffee lines carrying Coffea racemosa genes. Eighteen Arabica coffee lines derivative from the genotype C1195-5-6-2, and the cultivars IAPAR 59 and IPR 99 were evaluated for resistance to bacterial halo blight in two trials carried out in field conditions, in Londri
Crop Breed. Appl. Biotechnol.. Publicado em: 2018-03
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11. Triple plagiotropic branch in coffee: a new promising mutant?
Abstract Coffee tree is a shrub with dimorphic branches. The orthotropic stem grows vertically with two near-horizontal plagiotropic branches, per node, in opposite phyllotaxy. The consecutive nodes of the orthotropic stem are organized in parastichies. We report here mutant plants of Coffea arabica with triple plagiotropic branch, resulted from the whorled
Crop Breed. Appl. Biotechnol.. Publicado em: 2017-12
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12. Semen quality and reproductive performance of boars kept in pens containing conventional coffee husk as a floor covering
ABSTRACT The objective of this study was to evaluate the putative effects of the use of coffee husk as floor covering on boar semen quality. Sixteen boars were divided into two groups. The first group was held in a conventional system with a compact floor. The second group was kept on a compact floor covered with coffee pods. The experimental period was 60 d
R. Bras. Zootec.. Publicado em: 2016-07