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SAMPLE SIZE AND LINEAR RELATIONS IN SLENDER LEAF RATTLEBOX 196
Cargnelutti Filho, Alberto; Silveira, Daniela Lixinski; Bubans, Valéria Escaio; Osmari, Bruno Fillipin; Somavilla, Felipe Manfio; Ortiz, Vithória Morena; Osmari, Lucas Fillipin.
Objectives of this work were to determine the sample size (number of plants) to estimate the mean of slender leaf rattlebox (Crotalaria ochroleuca) traits and investigate the relations among traits. In an experimental area of 8 m × 20 m (160 m2), at 147 days after sowing, 110 plants were randomly selected. The following traits were evaluated for each plant: plant height, stem diameter, number of nodes, number of leaves, leaf fresh matter, stem fresh matter, shoot fresh matter, leaf dry matter, stem dry matter and shoot dry matter. Measures of central tendency, variability, skewness and kurtosis were calculated. Normality was verified using the Kolmogorov-Smirnov test and the sample size was calculated to estimate the mean of the traits, assuming estimation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Crotalaria ochroleuca; Sample sizing; Experimental precision; Correlation; Path analysis; Crotalaria ochroleuca; Dimensionamento amostral; Precisão experimental; Correlação; Aanálise de trilha.
Ano: 2022 URL: http://periodicosonline.uems.br/index.php/agrineo/article/view/6834
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Interrelations between agronomic and technological fiber traits in upland cotton Agronomy
Teodoro, Paulo Eduardo; Carvalho, Luiz Paulo de; Rodrigues, Josiane Isabela Silva; Farias, Francisco José Correia; Carneiro, Pedro Crescêncio Souza; Bhering, Leonardo Lopes.
Fiber length stands out among technological traits as one that still needs to be improved in cotton. Thus, the objectives of this work were to quantify the interrelations between agronomic and technological fiber traits and to identify traits that could be used for the indirect selection of cotton genotypes with longer fiber lengths. Agronomic and technological traits were evaluated in 36 elite lines of cotton that were cultivated in three environments. Canonical correlations were estimated between two groups of traits: agronomic and technological. Path analysis was performed that considered fiber length as the primary dependent variable. The genotypes presented variability in all the evaluated traits, and no significant genotype vs. environmental...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gossypium hirssutum L.r. latifolium Hutch; Path analysis; Canonical correlations; Indirect selection; Fiber quality..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39364
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Interrelations between agronomic and technological fiber traits in upland cotton Agronomy
Teodoro, Paulo Eduardo; Carvalho, Luiz Paulo de; Rodrigues, Josiane Isabela Silva; Farias, Francisco José Correia; Carneiro, Pedro Crescêncio Souza; Bhering, Leonardo Lopes.
Fiber length stands out among technological traits as one that still needs to be improved in cotton. Thus, the objectives of this work were to quantify the interrelations between agronomic and technological fiber traits and to identify traits that could be used for the indirect selection of cotton genotypes with longer fiber lengths. Agronomic and technological traits were evaluated in 36 elite lines of cotton that were cultivated in three environments. Canonical correlations were estimated between two groups of traits: agronomic and technological. Path analysis was performed that considered fiber length as the primary dependent variable. The genotypes presented variability in all the evaluated traits, and no significant genotype vs. environmental...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gossypium hirssutum L.r. latifolium Hutch; Path analysis; Canonical correlations; Indirect selection; Fiber quality..
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39364
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Direct and indirect effects of measures and reasons morphometric on the body yield of Nile tilapia, Oreochromis niloticus - doi: 10.4025/actascianimsci.v35i4.19807 Animal Sciences
Melo, Carlos Cicinato Vieira; Universidade Federal de Lavras; Reis Neto, Rafael Vilhena; Universidade Federal de Lavras; Costa, Adriano Carvalho; Universidade Federal de Lavras; Freitas, Rilke Tadeu Fonseca de; Universidade Federal de Lavras; Freato, Thiago Archangelo; Empresa de Pesquisa Agropecuária de Minas Gerais; Souza, Ulisses Nascimento de; Universidade Federal de Lavras.
The study was carried out with the objective of verifying which measures and morphometric ratios are more directly related to the body yield of Nile tilapia, Oreochromis niloticus, in two weight classes. Data were analyzed from 257 specimens of tilapia divided into two weight classes: p1 = 400 to 599 g and p2 = 600 to 900 g. The morphometric measurements standard length (SL), head length (HL), body height (BH) and body width (BW), and the ratios of these measures (HL / SL, BH / SL, BW / SL, HL / BH, BW / BH, BW / HL) were evaluated. The following body yields were calculated: carcass (RCAR), fillet (RFILE) and head (RCAB). The data were initially submitted to the "stepwise" procedure to eliminate problems of multicollinearity among the morphometric...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Path analysis; Evaluation of carcass; Animal breeding; Morphometry; Oreochromis niloticus.
Ano: 2013 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/19807
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Identification of breeding potential for grain yield and its component traits of common wheat varieties in the east Mediterranean Agrociencia
Sener,Okan.
Six experimental lines and one commercial wheat (Triticum aestivum L.) cultivar from diverse backgrounds were intercrossed in a half diallel and analyzed to determine suitable parents for hybrids combinations and promising hybrid combinations. The experiment was established in typical Mediterranean environment, using a randomized complete block design with three replications. General combining ability (GCA) and specific combining ability (SCA) effects were identified for spike length, spikelets per spike, kernel number per spike, kernel weight per spike, thousand kernel weight, and grain yield per plant. Spike length was determined by additive gene effect, though number of spikelets in spike was determined by non-additive genes. Number of kernels per...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum L.; Combining ability; Path analysis; Half-diallel analysis.
Ano: 2009 URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952009000700005
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Relationship between biochemical and photosynthetic traits with Asian soybean rust Anais da ABC (AABC)
OLIVEIRA,TÁSSIA B. DE; PEIXOTO,LEONARDO A.; TEODORO,PAULO E.; ALVARENGA,AMAURI A. DE; BHERING,LEONARDO L.; HOFFMANN-CAMPO,CLARA B..
Abstract Asian soybean rust (Phakopsora pachyrhizi – ASR) is one of the major diseases that occur in soybean and causes great damage to commercial crops. Therefore, the goal of this work was to investigate the relationship between biochemical and photosyntetic parameters in soybean with ASR. Two experiments were performed in a randomized complete block with three treatments (water, Tween 20, and methyl jasmonate). The evaluated traits were: severity, chlorophyll pools, concentration of phenolic compounds content, enzyme activity, and photosyntetic parameters. Based on Pearson correlation, correlation network and path analysis it was verified that the severity had high correlation with almost all traits evaluated meanwhile photosynthesis is weakly related...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Correlation network; Glycine max; Path analysis; Phakopsora pachyrhizi.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703925
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Use of the correlation coefficient in agricultural sciences: problems, pitfalls and how to deal with them Anais da ABC (AABC)
Kozak,Marcin; Krzanowski,Wojtek; Tartanus,MaŁgorzata.
This paper discusses a number of aspects concerning the analysis, interpretation and reporting of correlations in agricultural sciences. Various problems that one might encounter with these aspects are identified, and suggestions of how to overcome these problems are proposed. Some of the examples presented show how mistaken and even misleading the interpretation of correlation can be when one ignores simple rules of analysis.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Experimental design; Linearity; Path analysis; Simpson's paradox; Statistical analysis.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000400029
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Development and selection of super-sweet corn genotypes (sh2) through multivariate approaches Bragantia
Gonçalves,Gabriel Moreno Bernardo; Pereira,Messias Gonzaga; Ferreira Júnior,José Arantes; Schwantes,Ismael Albino; Durães,Nayara Norrene Lacerda; Crevelari,Jocarla Ambrosim; Amaral Junior,Antonio Teixeira do.
ABSTRACT The aim of the present study was to investigate relations among ten traits in super-sweet corn genotypes assessed by means of simple correlation, path and canonical variable analyses, as well as to investigate the relative importance of such traits to the super-sweet corn breeding program developed at Darcy Ribeiro Northern Fluminense State University in order to develop strategies able to improve the efficiency in the selection of superior genotypes. Thus, trials comprising 3 × 6 partial diallel of super-sweet (sh2) corn were carried out, according to a short_textrandomized block design (RBD)short_text with four repetitions, in two different environments located in Northern Rio de Janeiro State, Brazil (Itaocara and Campos dos Goytacazes...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays L.; Canonical variables; Path analysis; Mahalanobis-D2; Partial diallel..
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052018000400536
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Nitrogen use efficiency in modern wheat cultivars Bragantia
Todeschini,Matheus Henrique; Milioli,Anderson Simionato; Trevizan,Diego Maciel; Bornhofen,Elesandro; Finatto,Taciane; Storck,Lindolfo; Benin,Giovani.
ABSTRACT The nitrogen use efficiency (NUE) is defined as the capacity of a given genotype in take advantage of the applied nitrogen (N) and transform it in biomass and grains. The objective of this study was to evaluate 12 wheat cultivars as to the NUE and its components. The experiment was conducted in a controlled environment, in a randomized block design with three replications. Twelve wheat cultivars were submitted to four N supply levels (0, 80, 160 and 240 kg of N∙ha–1). The data were submitted to analysis of variance, means multiple comparison, polynomial regression, and path analysis. The nitrogen remobilization efficiency (NRE) was the main NUE component of the evaluated cultivars, in both low and high conditions of nitrogen fertilization. In the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Nitrogen nutrition; Path analysis; Chlorophyll; Yield.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052016000300351
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Heterosis in soybeans for seed yield components and associated traits BABT
Pandini,Fábio; Vello,Natal Antonio; Lopes,Ângela Celis de Almeida.
The objective of this research was to quantify heterosis of agronomic traits and evaluate direct and indirect correlations among seed yield and other traits. A diallel involving six parents was grown in two localities. Seed yield (PG), one-hundred seed weight (PCS), number of pods per plant (NV), weight of aerial part of the plant (PPA), harvest index (IC) and number of seeds per pod (NGV) were evaluated. Positive values of heterosis were detected for all traits. Estimates of heterosis components were significative for most traits, showing effects of aditivity and dominance. The specific heterosis was more important than the variety heterosis, mainly in the locality Anhembi. MTBR-95-123800 presented the best potential per se and as parent in crosses, but...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Breeding; Indirect selection; Correlations among traits; Path analysis; Glycine max.
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000600001
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Genetic variation and interrelationships of agronomic characteristics in durum wheat under two constructing water regimes BABT
Talebi,Reza; Fayyaz,Farzad; Naji,Amir Mohammad.
This work aimed to study the grain yield components and plant characteristics related to grain yield. Twenty-four durum wheat genotypes from the ICARDA durum wheat breeding program were grown during 2006-2007 under rainfed and irrigated conditions using a complete randomized block design with three replicate in west of Iran. Correlation and path analysis were carried out. Results showed that there was strong positive association of grain yield with the number of seed/spike, biomass and harvest index. Grain yield was negatively associated with spike length and plant height in different moisture conditions. Comparatively, high genetic variation was found in grain yield and other characteristics. Hierarchical cluster analysis was used as a tool to classify...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Durum wheat; Drought stress; Yield components; Path analysis.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000400006
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Stay-green character and its contribution in Brazilian wheats Ciência Rural
Luche,Henrique de Souza; Silva,José Antônio Gonzalez da; Nornberg,Rafael; Hawerroth,Maraisa Crestani; Silveira,Solange Ferreira da Silveira; Caetano,Vanderlei da Rosa; Santos,Rodrigo Lisboa; Figueiredo,Ricardo Garcia; Maia,Luciano Carlos da; Oliveira,Antônio Costa de.
ABSTRACT: The stay-green character has been related to greater stress tolerance and yield through longer activity of the photosynthetic apparatus. Association of this character with grain yield may be linked to a network of features other than the grain mass. This study aimed to shed light on the actual contribution of stay-green character in Brazilian wheats and the associations between grain yield components in different environmental conditions. The experiment was conducted in a randomized block design with three replications in the years 2003, 2004 and 2005. Sibling lines with and without the stay-green character were evaluated analyzing the phenotypic correlation and path analysis separately by year and maturity group. Under favorable growing...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Delayed senescence; Correlation; Path analysis.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000100204
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Plant traits to complement selection based on yield components in wheat Ciência Rural
Okuyama,Lauro Akio; Federizzi,Luiz Carlos; Barbosa Neto,José Fernandes.
The aim of the present study was to investigate the relationship between plant traits and yield per spike in wheat genotypes. The measured plant traits were: length of flag leaf blade, peduncle extrusion, peduncle, spike and sheath, culm diameter and plant height. Data were analyzed with correlation and path coefficient analysis. Yield per spike correlated positively with spike length and culm diameter. Path coefficient analysis indicated that, under irrigated condition, yield per spike had a positive direct effect and a positive correlation with spike length and culm diameter and, under non-irrigated condition, yield per spike showed a positive direct effect and a positive correlation with culm diameter, spike length and plant height. Culm diameter and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Correlation; Path analysis; Water stress; Irrigation.
Ano: 2005 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782005000500005
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Linear relationships between cherry tomato traits Ciência Rural
Sari,Bruno Giacomini; Lúcio,Alessandro Dal'Col; Santana,Cinthya Souza; Lopes,Sidinei José.
ABSTRACT: The objective of this study was to identify the linear relationship between cherry tomato yield components. Two uniformity trials, without treatments, were conducted on Lilli cherry tomato plants in a plastic greenhouse during the 2014 spring/summer season, with the plants in two stems. Variables observed for each plant were mean fruit length, mean fruit width, mean fruit weight, number of bunches, number of fruits per bunch, total number of fruits, and total fruit weight; a Pearson's correlation matrix was used to estimate the relationship between the variables. Path analysis was then performed considering total fruit weight as the main variable and the remaining variables as explanatory. Due to the severe multicollinearity, the variable 'number...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum lycopersicum var. cerasiforme; Path analysis; Correlation..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000300202
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DAIRY PRODUCTION OF ‘SAANEN’ GOATS BASED ON METEOROLOGICAL VARIABLES AND FUTURE CLIMATE SCENARIOS REA
Pequeno,Izaac D.; Turco,Silvia H. N.; Silva,Thieres G. F. da; Facó,Olivardo.
ABSTRACT This study aimed to modeling and bioclimatic zoning of ‘Saanen’ goat milk production in northeastern Brazil. Data were obtained from a 14-year dairy control program for 246 ‘Saanen’ goat matrices. Dairy production meteorological influence and mathematical modeling were assessed through statistical analyses such as Pearson’s correlation matrix and path analysis. Bioclimatic zoning for current and future scenarios, with climate changes, were delineated using inverse-square distance (ISD) and spherical model (kriging) interpolations. Results showed maximum air temperature to contribute substantially to goat dairy production; therefore, its modeling was based thereon. Current and future dairy production maps highlighted Maranhão and Piauí as regions...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Path analysis; Welfare; Stress; Climate change.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000200226
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CONTRIBUTION OF SOIL ATTRIBUTES AND MORPHOLOGICAL VARIABLES TO YIELD OF IRRIGATED GARLIC REA
Oliveira,Job T. de; Oliveira,Rubens A. de; Furtado Junior,Marconi R..
ABSTRACT This study aimed to investigate relationships between the soil attributes that most affect garlic yield, which can be useful to choose a new area for the growing of this vegetable. We also aimed to study the effects of irrigation deficit at bulb formation stage (cloves) on final garlic quality and yield. The variables evaluated were garlic yield, irrigation, nitrogen, lateral shoot growing, plant water potential, bulb volume, leaf area index, soil electrical conductivity, soil mechanical resistance to penetration, and volumetric soil moisture content. Initially, the Pearson's correlation was estimated for the phenological indexes, and a correlation network was used to graphically express the results and to correct multicollinearity between...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Allium sativum L.; Path analysis; Precision irrigation; Precision agriculture.
Ano: 2021 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162021000200215
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Biometric analysis in maize genotypes suitable for baby corn production in organic farming system Horticultura Brasileira
Nascimento,Maxwel R; Santos,Paulo Ricardo; Coelho,Fábio C; Jaeggi,Mário Euclides PC; Costa,Kleyton Danilo S; Souza,Maurício N.
ABSTRACT The aim of this study was to estimate and quantify the degree of association between phytotechnical variables for simultaneous selection of maize genotypes suitable to produce baby corn. Seven genotypes were arranged in field in randomized complete block design with four replicates. Genetic parameters, simple, path and canonical correlations of phytotechnical variables were estimated. The variables production of marketable spikes, length of marketable spikes, final plant stand and plant height showed over 80% heritability and variation index higher than the unity, indicating that superior genotypes can be obtained and selection gains. Significant phenotypic and genotypic correlations were observed for production of marketable spikes, positive and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Zea mays; Path analysis; Canonical correlation; Simultaneous selection.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300419
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Genetic parameter and correlation estimates of processing traits in half-sib progenies of tropical-adapted carrot germplasm Horticultura Brasileira
Vieira,Jairo V; Silva,Giovani Olegario da; Boiteux,Leonardo S.
The estimate of the genetic parameters associated with processing (fresh-cut) traits, including root length (RL), is crucial for carrot breeding programs in tropical areas. The cultivar Alvorada is an important germplasm due to its resistance to nematodes, leaf blight, heat-tolerance, and high carotenoid content. Seventy-four 'Alvorada' half-sib progenies were evaluated during the summer of 2005 in the Federal District, Brazil, in a randomized complete block design with three replications. Thirteen competitive plants in each block were randomly selected and evaluated and/or classified for RL and for number of leaves (NL), leaf length (LL), root tip type (RT), root mass (RW), crown shape (CS), root diameter (RD), and xylem diameter (XD). The Pearson's...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Daucus carota; Heritability; Genetic correlation; Path analysis; Root length.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000100002
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Analise tecnico-economica da pecuaria bovina do Pantanal; sub-regioes da Nhecolandia e dos Paiaguas. Infoteca-e
CADAVID GARCIA, E. A..
No Pantanal Sul-Mato-Grossense de 87.640 km2, foi desenvolvido um dos maiores critorios de bovino do Pais (1,9 a 2,2 milhoes de cabecas). A analise baseou-se em informacoes amostrais estratificadas (1982/83), estudos de casos e dados do censo agropecuario de 1980. O objetivo da analise foi determinar a disponibilidade e uso dos fatores avaliando o nivel de eficiencia e os entraves da pecuaria. Os dados sao apresentados em tabelas (medias e desvios-padrao); as inter-relacoes entre os fatores foram analisadas pela funcao de Cobb & Douglas com retornos variaveis a escala e pelo "path analysis". Os principais resultados sao: a) Remembramento das propriedades pequenas e desmembramento das grandes propriedades, com aparente equilibrio em torno de 7.200 ha; o...
Tipo: Livros Palavras-chave: Aspecto tecnico economico; Eficiencia economica; Path analysis; Nhecolandia; Paiaguas; Cattle production costs; Economical efficiency; Bovine; Bovino; Custo; Pecuária; Produção; Pantanal; Cattle breeding; Economics.
Ano: 1985 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/787713
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Relationship among phenotypic and quality traits in indigenous and exotic accessions of linseed PAB
Siddiqui,Ameena; Shukla,Sudhir; Rastogi,Anu; Bhargava,Atul; Niranjan,Abhishek; Lehri,Alok.
Abstract: The objective of this work was to evaluate the relationship among phenotypic and quality traits in a set of indigenous and exotic accessions of linseed (Linum usitatissimum). The experimental material consisted of 151 accessions of linseed belonging to landraces and cultivars collected from diverse agroecological zones. Five randomly chosen plants of each accession in each replicate were tagged, and data were recorded for the 12 following agronomic traits: days to flowering, days to maturity, plant weight, plant height, tillers per plant, secondary branches per plant, capsules per plant, seeds per capsule, 1,000 seed weight, harvest index, seed yield per plant, and oil content. Capsules per plant, harvest index, and plant weight played a direct...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Linum usitatissimum; Correlation; Fatty acids; Genetic advance; Heritability; Path analysis.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2016001201964
Registros recuperados: 33
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