Correlação entre crescimento e produtividade de cultivares de café em diferentes regiões de Minas Gerais, Brasil

Carvalho, Alex Mendonça de; Mendes, Antônio Nazareno Guimarães; Carvalho, Gladyston Rodrigues; Botelho, César Elias; Gonçalves, Flávia Maria Avelar; Ferreira, André Dominghetti

doi:10.1590/s0100-204x2010000300006

Cited by 58 publications

(66 citation statements)

References 8 publications

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“…44, 169.83, 173.41, 167.41, 164.22 and 176.10% for E1, E2, E3, E4, E5 and E6 respectively. Stem diameter is one of the vegetation attributes that most contribute to productivity in the coffee plant (CARVALHO et al, 2010;FREITAS et al, 2007). It is therefore likely that the levels of fertilization which provided maximum stem diameter in the plants for each period are located close to the ideal level of fertilization for coffee productivity.…”

Section: Resultsmentioning

confidence: 99%

Critical ranges for leaf nitrogen and potassium levels in coffee fertigated at the production phase1

Assis¹,

Guimarães²,

Colombo³

et al. 2015

Rev. Ciênc. Agron.

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-With the aim of establishing critical ranges for the leaf nitrogen (N) and potassium (K) levels in fertigated coffee crops under production, an experiment was carried out in the experimental area of the Sector for Coffee Cultivation of the Department of Agriculture at the Federal University of Lavras, in Brazil. Treatments consisted of five levels of fertilizer applied through fertigation: 30%, 80%, 130%, 180% and 230% of the recommended amounts of N and K for rainfed coffee grown in Minas Gerais. A randomised block design with four replications was used. Critical ranges for nutrient concentrations in the leaves were established from the results of growth characteristics (plant height and stem diameter), leaf analyses and productivity. The results obtained were: a) nitrogen (g kg -1): 32

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Section: Resultsmentioning

confidence: 99%

Critical ranges for leaf nitrogen and potassium levels in coffee fertigated at the production phase1

Assis¹,

Guimarães²,

Colombo³

et al. 2015

Rev. Ciênc. Agron.

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“…Martinez et al (2007) and Carvalho et al (2010), who evaluated genotypes of Coffea arabica, and Costa et al (2008), who evaluated progenies of Hevea brasiliensis, also reported a high correlation between PH and first production.…”

Section: Genetic Correlations and Path Analysismentioning

confidence: 93%

Genetic diversity and selection gain in the physic nut (Jatropha curcas)

Brasileiro¹,

Silva²,

Souza³

et al. 2013

Genet. Mol. Res.

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ABSTRACT. The use of efficient breeding methods depends on knowledge of genetic control of traits to be improved. We estimated genetic parameters, selection gain, and genetic diversity in physic nut half-sib families, in order to provide information for breeding programs of this important biofuel species. The progeny test included 20 halfsib families in 4 blocks and 10 plants per plot. The mean progeny heritability values were: 50% for number of bunches, 47% for number of fruits, 35% for number of seeds, 6% for stem diameter, 26% for number of primary branches, 14% for number of secondary branches, 66% for plant height, and 25% for survival of the plants, demonstrating good potential for early selection in plant height, number of branches, and number of fruits per plant. In the analysis of genetic diversity, genotypes were divided into 4 groups. Genotypes 18, 19, 20, and 8 clustered together and presented the highest means for the vegetative characters and production. Lower means were observed in the 17, 12, 13, and 9 genotypes from the same group. We detected genetic variability in this population, with high heritability estimates and accuracy, demonstrating the possibility of obtaining genetic gains for vegetative characters and production at 24 months after planting.

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“…NPTB exhibited a significant positive correlation with PSBD, RV, LDM, SDM, ADM, RDM, TDM, and DQI (Table 4). According to Carvalho et al (2010), the number of plagiotropic branches experiences strong environmental effects because of the interaction between genotype and environment. The higher negative correlation (-0.37) was between NIPS and NPR (Table 4).…”

Section: Genetic Divergencementioning

confidence: 99%

Development of clonal seedlings of promising Conilon coffee (Coffea canephora) genotypes

Covre¹,

Canal²,

Partelli³

et al. 2016

Aust J Crop Sci

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Conilon coffee is a highly heterozygous diploid plant that is also allogamous, producing seeds through cross-fertilisation. Due to their allogamy, plants of seminiferous origin are highly heterogeneous, exhibiting high morphological and genetic diversity. However, propagation through cutting guarantees the maximum homogeneity of fields, particularly in grain maturation, among other desirable characteristics. Currently, the majority of commercial Conilon coffee is planted using seedlings propagated by cuttings. Studying the juvenile behaviour of different clonal genotypes of the Conilon coffee plant represents an important tool to assist with the establishment of this crop. The objective of this study was to assess the growth, development and genetic diversit y in several promising genotypes of the Conilon coffee plant based on the morphological characteristics of seedlings propagated by cutting. We used seedlings Conilon coffee of 33 genotypes selected by coffee growers, and with great productive potential, and genotype 02 of the Emcapa 8111 variety. Based on morphological characteristics linked to the growth and development of the aboveground and root systems of the genotypes, their phenotypic correlations were estimated, along with the genetic diversity among genotypes, using Tocher's optimisation method and the unweighted peer group method with arithmetic mean. Genotypes A1, P2, Z39, Ouro Negro, Tardio C, Cheique, and Z29 exhibited a higher Dickson quality index (between 0.40 and 0.56). Genetic variability exists among the seedlings of the 34 genotypes of Conilon coffee studied. The most dissimilar genotypes were CHR, 18, and Z39, which remained in isolated groups in all experiments.Keywords: Coffea canephora; Genetic diversity; Variability; Vegetative propagation; Phenotypic correlation. Abbreviations: ADM_aboveground dry matter; ANA_National Water Agency; CONAB_National Food Supply Agency; DAPC_days after planting by cutting DQI_Dickson quality index; EMS_etiolation of the main stem; ICO_International Coffee Organization; LA_leaf area; LDM_leaf dry matter; LLR_length of largest root; MAPA_Brazilian Ministry of Agriculture; NIPS_number of internodes on the primary stem; NISS_number of internodes on the secondary stem; NOS_number of orthotropic shoots; NPR_number of primary roots; NPTB_number of plagiotropic branches; PSBD_primary stem base diameter; PSH_primary stem height; RDM_root dry matter; RV_root volume; SDM_stem dry matter; SLM_specific leaf mass; SSBD_secondary stem base diameter; SSH_secondary stem height; TDM_total dry matter; and UPGMA_hierarchical unweighted pair group method with arithmetic mean.

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Correlação entre crescimento e produtividade de cultivares de café em diferentes regiões de Minas Gerais, Brasil

Cited by 58 publications

References 8 publications

Critical ranges for leaf nitrogen and potassium levels in coffee fertigated at the production phase1

Critical ranges for leaf nitrogen and potassium levels in coffee fertigated at the production phase1

Genetic diversity and selection gain in the physic nut (Jatropha curcas)

Development of clonal seedlings of promising Conilon coffee (Coffea canephora) genotypes

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