Doutorado em Genética e Melhoramento
URI Permanente para esta coleção
Nível: Doutorado
Ano de início: 2013
Conceito atual na CAPES: 5
Ato normativo: Homologado pelo CNE/CES Parecer nº 250/2014, portaria nº 187 de 06/03/2015, publicado no DOU de 09/03/2015 seção 1, página 11
Periodicidade de seleção: Semestral
Área(s) de concentração: Genética e Melhoramento
Url do curso: https://geneticaemelhoramento.ufes.br/pt-br/pos-graduacao/PPGGM/detalhes-do-curso?id=1416
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Navegando Doutorado em Genética e Melhoramento por Autor "Cavatte, Paulo Cezar"
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- ItemDesempenho de genótipos de Coffea canephora cultivados sob condições contrastantes de disponibilidade de irradiância e nitrogênio(Universidade Federal do Espírito Santo, 2019-02-28) Machado, Lindomar de Souza; Cavatte, Paulo Cezar; https://orcid.org/0000-0003-2963-7673; http://lattes.cnpq.br/8029279967950425; https://orcid.org/0000-0002-0294-3892; http://lattes.cnpq.br/4465078794024312; Martins, Samuel Cordeiro Vitor; https://orcid.org/0000-0002-2428-8649; http://lattes.cnpq.br/3010246075881689; Dalvi, Leandro Pin; https://orcid.org/0000-0002-2995-8007; http://lattes.cnpq.br/7662111330884819; Moreira, Sarah Ola; https://orcid.org/0000-0003-0659-6725; http://lattes.cnpq.br/; Silva, Josimar Aleixo daThe coffee originates from the tropical forests of Africa, where it is found spontaneously as understorey vegetation. In Brazil, coffee plantations are being conducted almost exclusively in full sunshine, where production is in many cases greater than in shaded plantations. As a consequence, shading as a regular cultural practice has been virtually abandoned. However, it should be noted that full-sun coffee plantations are usually subsidized at the expense of large increases in input use, mainly nitrogen fertilizers, as well as increasing dependence on irrigation systems. However, in Brazil, C. canephora (Conilon / robusta coffee) genotypes currently selected were selected in full sun and therefore, such genotypes could potentially have adaptive limitations at low irradiance to a greater extent than possible selected genotypes exclusively for shaded environments. Due to the impacts of climate change, there has been an increasing interest in the adoption of shaded systems, particularly in marginal areas with large temperature fluctuations and occurrence of water deficit. As in shaded systems, ecosystem preservation and improvement of edaphoclimatic conditions, as well as improvements in beverage quality and attenuation of the biennial production cycle, are frequently observed. However, the search for shade tolerant materials requires the evaluation of a high number of genotypes under field conditions to obtain, at the end of several years, a few promising materials. The objective of this work (i) was to study the phenological variations in the growth and morphology of genotype production components, associating efficiency and / or responsiveness criteria, and (ii) to verify in a preliminary way the analysis of genetic parameters of morphophysiological characteristics for possible indirect selections as well as the diversity of the genotypes when cultivated under contrasting availability of irradiance and nitrogen. For this, 14 C. canephora genotypes, pre-improved in the experimental farm of Pacotuba, in the municipality of Cachoeiro de Itapemirim - ES, of the Capixaba Institute for Research, Technical Assistance and Rural Extension, were submitted to two irradiance conditions {full sun (PS) and 30% shading (SB)}, and two nitrogen (N) {25 (N25) and 100% (N100)} conditions of the recommended crop. The genotypic factors and irradiance are responsible for the greater portion of the variation verified; the nitrogen factor did not interfere in the productive levels evaluated. The 106-P genotype has dual irradiance capability. Genotypes 2B / 88-P, 108-P and 109-P are productive in shading. There is genetic diversity among the evaluated genotypes.
- ItemQUALIDADE DE Coffea canephora ASSOCIADA A ANÁLISES AGRONÔMICAS, FÍSICO-QUÍMICAS, SENSORIAIS E MOLECULARES(Universidade Federal do Espírito Santo, 2021-04-16) Souza, Lucimara Cruz de; Soares, Tais Cristina Bastos; https://orcid.org/0000000163567993; http://lattes.cnpq.br/6580031598802359; https://orcid.org/0000000157957960; http://lattes.cnpq.br/; Osorio, Vanessa Moreira; https://orcid.org/; http://lattes.cnpq.br/; Cavatte, Paulo Cezar; https://orcid.org/; http://lattes.cnpq.br/8029279967950425; Senra, Joao Felipe de Brites; https://orcid.org/; http://lattes.cnpq.br/2268398576674753; Ferrao, Maria Amelia GavaCoffee is one of the main commodities in Brazil, being the species Coffea canephora, a highlight of productivity in agribusiness in the state of Espírito Santo, WHERE it is referred to as conilon coffee. Agronomic, physical-chemical, sensory and molecular
- ItemRespostas morfofisiológicas e herança materna para tolerância à seca em progênies de café conilon(Universidade Federal do Espírito Santo, 2017-02-22) Sobreira, Franciele Barros de Souza; Ferrão, Maria Amélia Gava; Soares, Taís Cristina Basto; Cavatte, Paulo Cezar; Ferrão, Romário Gava; Caixeta, Eveline Teixeira; Rosado, Carla Cristina GonçalvesCoffee is currently one of the major commodities in Brazil. Among many works carried out aiming at the improvement of this culture, the search for materials more adapted to the climatic variations, especially the drought has been highlighted. This fact is mainly due to the climatic changes that are occurring in many Brazilian regions. The morphological and physiological analyzes of the plants have aided in the selection of drought tolerant genotypes for the evaluation of superiority in breeding programs. The present study aimed at evaluating the morphophysiological characteristics of conilon progenies submitted to drought, evaluating the plant morphology, photosynthesis and chemical quantification of foliar tissues, to verify the variability of the progenies, to evaluate the possibility of extrachromosomal maternal inheritance for drought tolerance and to identify more drought tolerant genotypes. The experiment was conducted at the Experimental Farm of the Marilândia-ES Incaper and two populations of Coffea canephora, derived from the cross between the susceptible clone 109 and the drought tolerant clone 120 (120x109 and 109x120) were used. For the evaluation of the experiment and conclusions of the results was used to descriptive statistics and principal component analyzes (PCA). It was observed through the measures of position and dispersion that there were many changes between the variables throughout the analysis period (July/2015, December/2015 and April/2016), wide variability among individuals within each evaluation period and that in April 2016 it was the most critical period of drought, among the evaluated periods, occurring, most of the time, decreases in the means of the analyzed parameters and greater variations in the progenies. In July and December 2015 the population 109x120 presented the highest averages, however in April 2016 the population 120x109, showed higher averages. These changes were allied to extrachromosomal maternal inheritance, mainly chloroplast, due to differences in the means of reciprocal crosses, for most variables. There was a greater manifestation of the characteristics of clone 109, as pollen recipient mother, in July and December of 2015, in the progenies 109x120, period of greater hydration of the plants. In April 2016, critical period of drought, there was a greater manifestation of clone 120, in the population 120x109, so it presented better means. Due to the variabilities observed among the individuals, the PCA were used to identify the parameters that best represented the variation among the individuals. Ten parameters were evaluated in July, nine in December and April in all individuals, demonstrating that approximately 80% of the observed variation can be explained by five and six principal xii components (PC) in the population 120x109, and four and five components in the 109x120. Each PC represented a proportion of the variation and was correlated in different degrees to the measured parameters. Attention was drawn to the information from PC1 and PC2, in April 2016, showing a better growth condition in the 120x109 population, due to the high positive correlation with RAF (leaf area ratio), AFU (unit leaf area), AFE (leaf area specific), FT (total phenol), proline and ETR (electron transport rate), which are important correlations between the variables, for the development of plants under conditions of water stress. Due to the different correlations of the PCA with the parameters, a hierarchical UPGMA grouping, based on average euclidean distance, was performed to discriminate the differentiations between the individuals. For the population 120x109, eight groups were identified in July/2015, ten in December/2015 and seven in April/2016. For the population 109x120, four groups in July/2015, three in December/2015 and three in April/2016. Based on average of the groups for each parameter, it was found that in April 2016, a critical period of drought, some individuals managed to maintain better morphophysiological characteristics, such as those presented in groups 3, 5 and 7, represented by individuals 1, 2, 12, 13, 17, 26, 28, 50 and 58 of the population 120x109, demonstrating phenological highlight to tolerate more drought, being the AFE, RAF, A, ETR, gs and A/gs variables more relevant for genotype discrimination. Genotypes 1, 26, 56 and 58 showed greater dissimilarity, but individual 56 was more characterized as susceptible to drought. It has also been shown that there are other individuals that have similar characteristics to those selected for tolerance and that deserve to be better explored, such as individuals 8, 9, 14, 22, 25, 29 for tolerance and genotypes 20, 21, 23, 31, 32, 33, 34, 35 for drought susceptibility. In summary, most of the mechanisms of resistance to drought in conilon coffee are governed by extrachro