scholarly journals Genetic parameters in a clonal test of Tectona grandis in Mato Grosso, Brazil

2021 ◽  
Vol 8 (2) ◽  
pp. 1417-1424
Author(s):  
Ana Carolina Pereira ◽  
Sidney Fernando Caldeira ◽  
Daniele Aparecida Alvarenga Arriel
Keyword(s):  
Genetic Parameters ◽  
Block Design ◽  
Tectona Grandis ◽  
Timber Species ◽  
Mato Grosso ◽  
Tropical Regions ◽  
High Productivity ◽  
Randomized Block Design ◽  
Clonal Test ◽  
Moderate Magnitude

Teak (Tectona grandis) is a high-value timber species in tropical regions. In Brazil, although teak has a high productivity, there are few studies related to its genetic improvement. This work aimed to estimate genetic parameters and evaluate potential gains of selection in a clonal test of teak installed in the state of Mato Grosso, Brazil. The experimente is in a randomized block design, with five replications, 3x3 m spacing, 22 treatments, and plots with six individuals. At five years, the genotypes were evaluated for survival (S), tree total height (H) and girth at breast height (GBH). There was significance and feasibility of selection for S and GBH. For H, the result was not significant, indicating few gains with the selection. The genetic parameters of clonal mean heritabilities and accuracy were of moderate magnitude for S and GBH and low for H. To best of our knowledge, this is the first work that estimates genetic parameters in a clonal teak test in the field in Brazil.

scholarly journals Morphological descriptors for the characterization of teak clones (Tectona grandis L.f.) in plantations

2020 ◽  
Vol 29 (2) ◽  
pp. eRC02
Author(s):  
Jorge-L. Reategui-Betancourt ◽  
Daniele Aparecida-A. Arriel ◽  
Sidney-Fernando Caldeira ◽  
Antonio-Rioyei Higa ◽  
Paulo-C. Flôres-Junior ◽  
...  
Keyword(s):  
Block Design ◽  
Similarity Measures ◽  
Morphological Characteristics ◽  
Tectona Grandis ◽  
Group Method ◽  
Morphological Descriptors ◽  
Mato Grosso ◽  
Pair Group ◽  
Randomized Block Design ◽  
Clonal Test

Aim of study: The objective of this work was to identify possible morphological descriptors for teak clones, in order to support the cultivars protection process of this species.Area of study: This experiment was carried out in ‘São José dos Quatro Marcos’, Mato Grosso, midwest Brazil.Material and methods: A teak clonal test, assessing 18 clones, was evaluated at the ages of 29 and 41 months by means of 41 morphological characteristics, related mainly to the branches, leaves and trunk. The clonal test was established in a randomized block design composed by three blocks, each block containing 18 plots, one for each clone. Each plot had 36 plants, but only the innermost five individuals were selected and evaluated. The information was organized in a presence and absence matrix. Subsequently, genetic similarity measures were estimated, by means of the Jaccard index, and a clustering was performed by the Unweighted Pair Group Method using the Arithmetic averages (UPGMA) method.Main results: A total of 26 and 28 morphological characteristic that exhibited DHS (distinction, homogeneity and stability) were identified at the ages of 29 and 41 months, respectively. Of these, 17 characteristics showed the same behavior at 29 and 41 months of age. However, it is important to emphasize that the evaluation must be performed under the same planting conditions in which these descriptors were developed.Research highlights: These 17 morphological characteristics can compose the list of potential morphological descriptors to be used in the process of teak clones/cultivars protection.Keywords: cultivars protection; morphological characteristics; distinction, homogeneity; stability.

scholarly journals Assessing the genotypic performance of carioca beans through mixed models

2018 ◽  
Vol 48 (7) ◽  
Author(s):  
Yure Pequeno de Souza ◽  
Paulo Ricardo dos Santos ◽  
Maxwel Rodrigues Nascimento ◽  
Kleyton Danilo da Silva Costa ◽  
Thalyson Vasconcelos Lima ◽  
...  
Keyword(s):  
Mixed Models ◽  
Selection Criteria ◽  
Genetic Parameters ◽  
Block Design ◽  
Breeding Programs ◽  
Randomized Block Design ◽  
Bean Yield ◽  
The Mean ◽  
Moderate Magnitude ◽  
Selection Of

ABSTRACT: Using genotypes adapted to different regions is one of the main ways to increase Brazilian bean yield. The aim of the present study was to assess the genotypic performance of Carioca beans through mixed models. Fourteen Carioca bean genotypes were assessed in four locations in Pernambuco State (Arcoverde, Caruaru, Belém de São Francisco and São João counties) in 2015. The experiments followed a completely randomized block design, with three repetitions. Genetic parameters were estimated according to the REML/BLUP methodology, whereas genotype selection was based on the harmonic mean of relative performance of genetic values method (MHPRVG). The mean genotype heritability had moderate magnitude, high selective accuracy, besides allowing selection of agronomically superior individuals. Genotypes ‘BRS Notável’, CNFC 15480 and ‘IPR 139’ showed good adaptability and grain yield stability. There was agreement among the statistics μ ̂ + g ̂…, stability (MHVG), adaptability (PRVG), and stability and adaptability of genetic values (MHPRVG) in the discrimination of the most productive genotypes, which presented high adaptability and stability. This outcome indicated that these genotypes can be part of the selection criteria regularly used in bean breeding programs.

scholarly journals IBA EFFICIENCY ON MINI-CUTTING ROOTING FROM TEAK (Tectona grandis Linn F.) CLONES

2016 ◽  
Vol 40 (3) ◽  
pp. 477-485
Author(s):  
Yorleny Badilla ◽  
Aloisio Xavier ◽  
Olman Murillo ◽  
Haroldo Nogueira de Paiva
Keyword(s):  
Root Biomass ◽  
Block Design ◽  
Sun Exposure ◽  
Tectona Grandis ◽  
Experimental Unit ◽  
Genotypic Effect ◽  
Mato Grosso ◽  
Randomized Block Design ◽  
Collar Diameter ◽  
Very High

ABSTRACT This study aimed to evaluate IBA efficiency in mini-cuttings rooting based on four Tectona grandis clones. Vegetative samples were collected in a hydroponic mini-clonal hedge in Verde Novo reforestation company at Colider, Mato Grosso. A factorial arrangement (4 x 6) was utilized, based on Carapá, Ipê, GU5 and TB7 clones vs six IBA dosages (0, 1000, 2000, 4000, 8000 and 16000 mg L-1), in a randomized block design based on three repetitions and 16 mini-cuttings per experimental unit. Cutting evaluations were based on survival and rooting rates after greenhouse conditions, after shadow-house, and at sun exposure, besides, total height, collar diameter, aerial and root biomass were also analyzed. Results registered a 95,4% average survivance rate as well as a 91,8% rooting rate, considered as very high for this tree species. IBA dosages utilization did not produce a significative effect on rooting mini-cuttings from these investigated clones. However, there were different responses among clones, which suggests a genotypic effect.

scholarly journals PRODUCTIVITY, FRUIT PHYSICOCHEMICAL QUALITY AND DISTINCTIVENESS OF PASSION FRUIT POPULATIONS

2016 ◽  
Vol 38 (4) ◽  
Author(s):  
NATAN RAMOS CAVALCANTE ◽  
WILLIAN KRAUSE ◽  
JOICE FERNANDES DE CARVALHO ◽  
MARIA KERHOLAYNE PEREIRA ROCHA ◽  
EDNAMAR GABRIELA PALÚ ◽  
...  
Keyword(s):  
Block Design ◽  
Physicochemical Characteristics ◽  
Passion Fruit ◽  
State University ◽  
Dissimilarity Matrix ◽  
Mato Grosso ◽  
Matrix Groups ◽  
Physicochemical Quality ◽  
High Productivity ◽  
Randomized Block Design

ABSTRACT The productivity and physicochemical quality evaluation is important, as it identifies superior populations. However, launching products requires following the descriptors according to DHE test instructions. Thus, this study aimed to evaluate three passion fruit populations with high productivity and physicochemical quality characteristics for commercial launch. The experiment was conducted at the State University of Mato Grosso experimental area, located in the municipality of Tangará da Serra, MT. The experimental design was complete randomized block design with four replicates and ten plants per plot. The physicochemical characteristics were submitted to analysis of variance and compared by the Tukey test. For the distinctiveness test, 25 descriptors were evaluated, where quantitative data have been converted into multicategoric data to obtain the dissimilarity matrix. From the dissimilarity matrix, groups were formed using the Tocher and UPGMA methods, Livestock and Supply Department. The highest productivity and number of fruits were verified for BRS Rubi Cerrado cultivar and UNEMAT S10 population. Populations and cultivars presented physicochemical characteristics that meet the required quality for both fresh consumption and industry use. Based on the distinction test among genotype, it was observed that the descriptors were effective for population differentiation. UNEMAT S10 population has characteristics that distinguish it from other cultivars and populations evaluated, and presents high agronomic performance; therefore, it can be launched as a commercial cultivar.

scholarly journals Genetic parameters and estimated genetic gains in young rubber tree progenies

2013 ◽  
Vol 48 (4) ◽  
pp. 411-416 ◽  
Author(s):  
Cecília Khusala Verardi ◽  
Erivaldo José Scaloppi Junior ◽  
Guilherme Augusto Peres Silva ◽  
Lígia Regina Lima Gouvêa ◽  
Paulo de Souza Gonçalves
Keyword(s):  
Genetic Gain ◽  
Genetic Parameters ◽  
Block Design ◽  
Rubber Tree ◽  
First Year ◽  
Genetic Gains ◽  
Selection Gain ◽  
Randomized Block Design ◽  
Using Data ◽  
Selection Of

The objective of this work was to assess the genetic parameters and to estimate genetic gains in young rubber tree progenies. The experiments were carried out during three years, in a randomized block design, with six replicates and ten plants per plot, in three representative Hevea crop regions of the state of São Paulo, Brazil. Twenty-two progenies were evaluated, from three to five years old, for rubber yield and annual girth growth. Genetic gain was estimated with the multi-effect index (MEI). Selection by progenies means provided greater estimated genetic gain than selection based on individuals, since heritability values of progeny means were greater than the ones of individual heritability, for both evaluated variables, in all the assessment years. The selection of the three best progenies for rubber yield provided a selection gain of 1.28 g per plant. The genetic gains estimated with MEI using data from early assessments (from 3 to 5-year-old) were generally high for annual girth growth and rubber yield. The high genetic gains for annual girth growth in the first year of assessment indicate that progenies can be selected at the beginning of the breeding program. Population effective size was consistent with the three progenies selected, showing that they were not related and that the population genetic variability is ensured. Early selection with the genetic gains estimated by MEI can be made on rubber tree progenies.

scholarly journals Okra seedlings production in protected environment, testing substrates and producing fruits in field

2013 ◽  
Vol 31 (1) ◽  
pp. 08-14 ◽  
Author(s):  
Edilson Costa ◽  
Taynara G de Souza ◽  
Gleciane de L Benteo ◽  
Katiane SS Benett ◽  
Cleiton GS Benett
Keyword(s):  
Block Design ◽  
Joint Analysis ◽  
State University ◽  
Mato Grosso ◽  
Randomized Block Design ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Hot Weather ◽  
Favorable Conditions ◽  
Mato Grosso Do Sul

The okra grows well in hot weather, finding favorable conditions for development in Brazil. We evaluated the production of okra seedlings and productivity. The experiment was conducted in the experimental area of the State University of Mato Grosso do Sul, in Aquidauana. In the seedling phase we tested substrates (100% triturated cassava stems, 75% triturated cassava stems and 25% vermiculite, 50% triturated cassava stems and 50% vermiculite, 25% triturated cassava stems and 75% vermiculite and 100% vermiculite). These substrates were placed in two protected environments (nursery with black screen, 50% of shading, and aluminized screen, 50% of shading). Each environment was considered an experiment conducted in completely randomized design with eight replications. After that we realized joint analysis. In the field, a total of 10 treatments generated from combinations of environments and substrates (2 environments x 5 substrates) were distributed in a randomized block design with four replications. The average proportions of cassava stems and vermiculite may be suitable for okra seedlings. The results of shoot and total dry phytomass indicate that the aluminized screen can be recommended for okra seedlings production when the substrate with a 1:1 ratio is used. Seedlings grown on higher percentages of vermiculite anticipate production, while seedlings produced only in cassava stems tend to slow it down. The aluminized screen tends to increase the yield of okra seedlings. Average proportions of vermiculite and cassava stems for seedling production under aluminized screen, provide more fruits and yield of okra in Aquidauana.

scholarly journals The effect of Broussonetia papyrifera invasion on the regeneration of selected native timber species in a tropical moist forest in Uganda

2021 ◽  
Author(s):  
Davis Mark Ssemanda ◽  
Enock Ssekuubwa
Keyword(s):  
Tropical Forests ◽  
Linear Models ◽  
Block Design ◽  
Basal Area ◽  
Timber Production ◽  
Timber Species ◽  
Production Potential ◽  
Broussonetia Papyrifera ◽  
Randomized Block Design ◽  
Moist Forest

Abstract Broussonetia papyrifera has been identified as one of the top invasive species in some African tropical forests with potentially devastating impacts on the conservation and timber production potential of the forests. This study determined the effect of B. papyrifera on the regeneration of selected native timber species in Mabira Forest Reserve, Uganda. The abundance, basal area and population structure of the timber species were compared between areas invaded and uninvaded by B. papyrifera. Employing a complete randomized block design, a total of forty plots (30 x 30 m each), and equally distributed between invaded and uninvaded areas with similar habitat conditions were surveyed. Counts of seedlings were recorded and diameter of saplings and trees measured. Generalized linear models were used to analyze the abundance, tree basal area and size class distributions of the selected species. The study revealed that the effects of B. papyrifera invasion vary depending on the growth stage and species studied. Overall, B. papyrifera invasion significantly reduced tree abundance and basal area, and suppressed the regeneration of some but not all the selected species. Our results demonstrate that if the spread of B. papyrifera is not abated, it will lower the conservation and timber production potential of tropical forests. Therefore, we call for interventions to control the spread of B. papyrifera to the uninvaded parts of the forests and halt its multiplication in invaded areas so as to enhance the regeneration and growth of timber species.

scholarly journals Kompetisi beberapa jenis gulma terhadap pertumbuhan awal beberapa varietas tanaman tebu (Saccharum officinarum L.)

2020 ◽  
Vol 1 (1) ◽  
pp. 21
Author(s):  
Dentin Queentiara Moelyaandani ◽  
S Setiyono
Keyword(s):  
Block Design ◽  
Saccharum Officinarum ◽  
Cyperus Rotundus ◽  
Stem Diameter ◽  
Initial Growth ◽  
High Productivity ◽  
Sugarcane Varieties ◽  
Randomized Block Design ◽  
Best Response ◽  
Number Of Leaves

Sugarcane (Sacharum officinarum L.) is a sugar-producing plant and is a food commodity that is needed by the people of Indonesia. National sugar demands are increasing every year. The low productivity of sugarcane is due to the competition of weeds which can reduce sugarcane production. To achieve high productivity, it is necessary to pay attention to the varieties used because they require certain conditions in their management. The purpose of this study was to determine the effect of varieties and types of weeds on the initial growth of sugarcane. The study was conducted from September 2018 to December 2018. The study used factorial Randomized Block Design (RBD) with two factors and four replications. The first factor consists of 4 sugarcane varieties, namely: Bululawang (V1), Red HW (V2), VMC (V3) and PS 862 (V4). The second factor type of weed consists of 2 types, namely Cyperus rotundus (N1) and Amaranthus spinosus L. (N2). The results showed that (1) There was interaction between the varieties (V) and the weed types (N) in stem diameter parameters and number of tillers, the treatment V4N1 gives the best response to stem diameter 1,31 cm and 4,25 number of tillers; (2) The treatment of varieties (V) gives affects to stem diameter and number of leaves, the treatment V4 gives the best response 5,38 to number of leaves; (3) Types of thorn spinach weeds can reduce the initial growth of sugarcane. Keywords: Varieties; weed; sugarcane

scholarly journals DÉFICIT HÍDRICO NAS FASES VEGETATIVA E DE FLORAÇÃO DA PIMENTA ‘TABASCO’ EM AMBIENTE PROTEGIDO

Irriga ◽  
2018 ◽  
Vol 21 (3) ◽  
pp. 561
Author(s):  
Lígia Borges Marinho ◽  
José Antonio Frizzone ◽  
João Batista Tolentino Junior ◽  
Janaína Paulino ◽  
José Monteiro Soares ◽  
...  
Keyword(s):  
Water Consumption ◽  
Deficit Irrigation ◽  
Block Design ◽  
Capsicum Frutescens ◽  
Flowering Stage ◽  
Mato Grosso ◽  
Randomized Block Design ◽  
Start Up ◽  
E Mail

DÉFICIT HÍDRICO NAS FASES VEGETATIVA E DE FLORAÇÃO DA PIMENTA ‘TABASCO’ EM AMBIENTE PROTEGIDOLÍGIA BORGES MARINHO 1; JOSÉ ANTONIO FRIZZONE2; JOÃO BATISTA TOLENTINO JUNIOR3; JANAÍNA PAULINO4; JOSÉ MONTEIRO SOARES5 E FRANCISCO NOGUEIRA VILAÇA6*Artigo extraído da tese do primeiro autor1 Enga. Agrônoma, Doutora, Profa. Departamento Tecnologia e Ciências Sociais, Universidade do Estado da Bahia, av. Edgard Chastinet, São Geraldo, CEP 48905-680, Juazeiro, BA. Fone (74) 3611-7363. E-mail: [email protected] Eng. Agrônomo, Doutor, Prof. Departamento de Engenharia de Biossistemas/Escola Superior de Agricultura “Luiz de Queiroz” USP, Av. Pádua Dias, 11, CEP 13.418-900, Piracicaba/SP, E-mail(s): [email protected];3 Eng. Agrônomo, Doutor, Prof. Campus Curitibanos, Universidade Federal de Santa Catarina, Curitibanos, SC. E-mail: [email protected] Enga. Agrícola, Doutora, Profa. Universidade Federal de Mato Grosso UFMT, campus Sinop, Avenida Alexandre Ferronato Nº 1.200. Bairro: Setor Industrial. CEP: 78.550-000, Sinop-MT, Email: [email protected] Eng. Agrônomo, Doutor, Pesquisador EMBRAPA/CPATSA, BR 428, Km 152, Zona Rural, Caixa Postal 23, CEP: 56310-000, Petrolina, PE, E-mail: [email protected] Eng. Agrônomo, Mestre. Departamento de Engenharia de Biossistemas/Escola Superior de Agricultura “Luiz de Queiroz” USP, Av. Pádua Dias, 11, CEP 13.418-900, Piracicaba/SP, E-mail: [email protected] RESUMOA escassez de recursos hídricos no Brasil tem impulsionado a demanda de manejo de irrigação mais eficiente nas propriedades agrícolas, visando reduzir o consumo de água e tornar o seu uso mais eficiente. O objetivo foi avaliar o efeito do déficit hídrico em diferentes fases do cultivo da pimenteira na eficiência de uso de água, na produtividade e na qualidade da pimenta ‘Tabasco’ cultivada em ambiente protegido, durante os meses de setembro de 2009 a julho de 2010, no município de Piracicaba-SP. O delineamento foi em blocos casualizados, com lâminas de irrigação de 40, 60, 80 e 100% da evapotranspiração da cultura (ETc), inicializadas nas fases vegetativa e de floração. O déficit de irrigação influenciou a produtividade da pimenta e o mesmo não foi observado para a qualidade física da pimenta. A eficiência do uso da água da pimenta Tabasco não foi influenciada pelo déficit. Entretanto, o déficit hídrico inicializado na fase de floração permitiu economia de água de até 50,1% de água no ciclo de 208 dias após transplantio.Palavras-chave: Estresse hídrico, Capsicum frutescens, produtividade e qualidade do fruto.MARINHO, L. B.; FRIZZONE, J. A.; TOLENTINO JÚNIOR, J. B.; PAULINO, J.; SOARES, J. M.; VILAÇA, F. N.WATER DEFICIT APPLIED IN VEGETATIVE AND FLOWERING STAGE OF ‘TABASCO’ PEPPER IN GREENHOUSE2 ABSTRACTThe scarcity of water resources in Brazil has driven the management of demand for more efficient irrigation in farms in order to reduce water consumption and make its use more efficient. The objective of this study was to evaluate the water deficits’ effect at the vegetative and flowering stages of pepper in water use efficiency, yield and quality of pepper cv. 'Tabasco'(Capsicum frutescens) grown in a greenhouse from September 2009 to July 2010. The experiment was conducted as randomized block design with irrigation levels of 40, 60, 80 and 100% of Crop Evapotranspiration (ETc), beginning at vegetative and flowering stages. There was a significant effect of full and deficits irrigation started at vegetative and flowering stages on the fruit number per plant, and the linear model was the best fitted. The average of mass fruit per plant did not vary with the deficit, not even with the start up times. The deficit irrigation affected pepper productivity, yet it was not observed on the physical quality of fruits. The deficit irrigation (40% ETc) beginning at flowering stage allowed savings of up to 49.8% in water consumption in a cycle of 208 days after transplanting.Keywords: water stress, Capsicum frutescens, productivity and fruit quality.

scholarly journals Linear Relationships Between Yield, Quality and Phenological Traits of Strawberry Cultivars

2020 ◽  
Vol 8 (3) ◽  
pp. 737
Author(s):  
Maria Inês Diel ◽  
Alessandro Dal’Col Lúcio ◽  
Denise Schmidt ◽  
Marcos Vinícius Marques Pinheiro ◽  
Tiago Olivoto ◽  
...  
Keyword(s):  
Fruit Quality ◽  
Block Design ◽  
Indirect Selection ◽  
High Productivity ◽  
Selection Processes ◽  
Linear Relationships ◽  
Randomized Block Design ◽  
Full Flowering ◽  
Yield Quality ◽  
High Production

The great economic importance attributed to strawberry cultivation raises the interest in cultivars of high productivity and superior fruit quality. The quality of fruit is the most impacting factor for the strawberry marketing, but selecting genotypes that combine high production and high fruit quality has been a difficult task. The objective of this study was to determine the linear relationships between phenological, quality and production variables of strawberry aiming at identifying potential variables for indirect selection in future selection processes of strawberry genotypes. A trial was conducted in a randomized block design with two cultivars and two transplant origins, grown in four types of substrate. Fifteen variables, including phenological, productive and fruit quality-related variables were assessed. The selected variables explained 45.2 and 39.1 % for PC1 and PC2 respectively, totaling 84.3 % of the total variance of the variables in the PCA, and indicated important relationships between the variables, and a path analysis revealed success for indirect selection of total mass of fruits based on the total number of fruits (0.81413). Changes in crop management that reduces the period between planting date and full flowering may be an alternative to increase the production of strawberry and provide fruits with higher quality.

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