title: Biometry and diversity of Arabica coffee genotypes cultivated in a high density plant system.
abstract: The present study was developed to respond to the need for an increase in crop yield in the mountain region of Caparaó (southern Espírito Santo State, Brazil), an area of traditional coffee production. This study aimed to analyze the diversity and characterize the crop yield of genotypes of Coffea arabica L. with potential for cultivation in high plant density systems. In addition, it also aimed to quantify the expression of agronomic traits in this cultivation system and provide information on the genotypes with the highest cultivation potential in the studied region. The experiment followed a randomized block design with 16 genotypes, four repetitions, and six plants per experimental plot. Plant spacing was 2.00 x 0.60 m, with a total of 8333 plants per hectare, representing a high-density cultivation system. Coffee plants were cultivated until the start of their reproductive phenological cycles and were evaluated along four complete reproductive cycles. Genotypes with high crop yield and beverage quality, short canopy, and rust resistance were selected. C. arabica genotypes showed variability in almost all characteristics. It was possible to identify different responses among genotypes grown in a high plant density cultivation system. Although the chlorophyll a content was similar among genotypes, the genotypes Acauã, Araponga MG1, Sacramento MG1, Tupi, and Catuaí IAC 44 showed a higher chlorophyll b content than the other genotypes. Among these, Sacramento MG1 also showed high leafiness and growth of vegetative structures, whereas Araponga MG1, Pau-Brasil MG1, and Tupi showed high fruit production. In addition, Araponga MG1 had also a higher and more stable crop yield over the years.
authors.affiliation: Programa de Pós-Graduação em Produção Vegetal, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, ES, Brasil.
authors.forename: W N
authors.initials: WN
authors.lastname: Rodrigues
authors.affiliation: Departamento de Agronomia, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, ES, Brasil.
authors.forename: M A
authors.initials: MA
authors.lastname: Tomaz
authors.affiliation: Empresa Brasileira de Pesquisa Agropecuária (Embrapa Café), Vitória, ES, Brasil.
authors.forename: M A G
authors.initials: MA
authors.lastname: Ferrão
authors.affiliation: Programa de Pós-Graduação em Produção Vegetal, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, ES, Brasil.
authors.forename: L D
authors.initials: LD
authors.lastname: Martins
authors.affiliation: Programa de Pós-Graduação em Produção Vegetal, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, ES, Brasil.
authors.forename: T V
authors.initials: TV
authors.lastname: Colodetti
authors.affiliation: Programa de Pós-Graduação em Produção Vegetal, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, ES, Brasil.
authors.forename: S V B
authors.initials: SV
authors.lastname: Brinate
authors.affiliation: Departamento de Engenharia Rural, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, ES, Brasil.
authors.forename: J F T
authors.initials: JF
authors.lastname: Amaral
authors.affiliation: Centro Regional de Desenvolvimento Rural, Centro Serrano, Instituto Capixaba de Pesquisa, Assistência Técnica e Extensão Rural, Domingos Martins, ES, Brasil.
authors.forename: F M
authors.initials: FM
authors.lastname: Sobreira
authors.affiliation: Programa de Iniciação Científica, Centro de Ciências Agrárias, Universidade Federal do Espírito Santo, Alegre, ES, Brasil.
authors.forename: M A
authors.initials: MA
authors.lastname: Apostólico
mesh_terms: D000383:Agriculture / Q000379:methods*; D001699:Biometry; D002734:Chlorophyll / Q000096:biosynthesis; D000077194:Chlorophyll A; D040503:Coffea / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D014644:Genetic Variation; D005838:Genotype; D010641:Phenotype; D000069600:Plant Breeding; D018515:Plant Leaves / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D019655:Quantitative Trait, Heritable; D012639:Seeds / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism
chemical_list: D002734:Chlorophyll; C037184:chlorophyll b; D000077194:Chlorophyll A