Keywords
Linear relations
Number of plants
Sample sizing.
How to Cite
Abstract
It is important to adequately size the number of plants that should be evaluated to allow precise inferences about the traits under evaluation. The study of the linear relations among traits provides important information, especially in the identification of traits for indirect selection. So, the objectives of this work were to determine the sample size (number of plants) to estimate the mean of Crotalaria spectabilis traits and investigate the relations among traits. Were randomly selected 200 and 110 plants of C. spectabilis in the experiments conducted, respectively, in 2019/2020 and 2020/2021. In these 310 plants, the following traits were evaluated: 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. The sample size was calculated to estimate the mean of these traits, based on Student's t-distribution, and the relations among traits were investigated through correlation and path analysis. To estimate the mean of these ten traits of C. spectabilis, with a maximum error of 10% of the mean and 95% confidence level, 64 plants are needed. In an experiment, to estimate the mean of each treatment with 10% precision, 64 plants per treatment must be evaluated. The number of leaves has a positive linear relation with the amount leaf, stem and shoot fresh and dry matter.
References
Alvares, C. A., Stape, J. L., Sentelhas, P. C., Gonçalves, J. L. M., & Sparovek, G. (2013). Köppen's climate classification map for Brazil. Meteorologische Zeitschrift, 22(6), 711-728. doi: 10.1127/0941-2948/2013/0507
Burin, C., Cargnelutti, A., Fº., Toebe, M., Alves, B. M., & Fick, A. L. (2014). Dimensionamento amostral para a estimação da média e da mediana de caracteres de tremoço branco (Lupinus albus L.). Comunicata Scientiae, 5(2), 205-212. doi: 10.14295/cs.v5i2.317
Bussab, W. O., & Morettin, P. A. (2017). Estatística básica. Saraiva.
Cargnelutti, A., Fº., Alves, B. M., Toebe, M., Burin, C., & Wartha, C. A. (2018a). Sample size to estimate the mean of traits in jack bean. Revista Brasileira de Ciências Agrárias, 13(1), e5505. doi: 10.5039/agraria.v13i1a5505
Cargnelutti, A., Fº., Facco, G., Santos, G. O., Alves, B. M., Burin, C., & Kleinpaul, J. A. (2017). Linear relations among pigeon pea traits. Comunicata Scientiae, 8(3), 493-502. doi: 10.14295/CS.v8i3.1420
Cargnelutti, A., Fº., Toebe, M., Alves, B. M., Burin, C., & Wartha, C. A. (2018b). Linear relations among traits in jack bean (Canavalia ensiformis). Bioagro, 30(2), 157-162.
Cargnelutti, A., Fº., Toebe, M., Burin, C., Alves, B. M., Facco, G., & Casarotto, G. (2014). Relações lineares entre caracteres de nabo forrageiro e de tremoço branco. Ciência Rural, 44(1), 18-24. doi: 10.1590/S0103-84782014000100004
Carvalho, M. L., Vanolli, B. S., Schiebelbein, B. E., Borba, D. A., Luz, F. B., Cardoso, G. M., Bortolo, L. S., Marostica, M. E. M., & Souza, V. S. (2022). Guia prático de plantas de cobertura: aspectos filotécnicos e impactos sobre a saúde do solo. ESALQ-USP.
Cruz, C. D., Carneiro, P. C. S., & Regazzi, A. J. (2014). Modelos biométricos aplicados ao melhoramento genético (vol. 2, 3a ed.). UFV.
Cruz, C. D., Regazzi, A. J., & Carneiro, P. C. S. (2012). Modelos biométricos aplicados ao melhoramento genético (vol. 1, 4a ed.). UFV.
Cruz, C. D. (2016). Genes Software - extended and integrated with the R, Matlab and Selegen. Acta Scientiarum Agronomy, 38(4), 547-552. doi: 10.4025/actasciagron.v38i4.32629
Facco, G., Cargnelutti, A., Fº., Alves, B. M., Burin, C., Santos, G. O., Kleinpaul, J. A., & Neu, I. M. M. (2016). Sample size for estimating average productive traits of pigeon pea. Ciência Rural, 46(4), 619-625. doi: 10.1590/0103-8478cr20150852
Facco, G., Cargnelutti, A., Fº., Lúcio, A. D., Santos, G. O., Stefanello, R. B., Alves, B. M., Burin, C., Neu, I. M. M., & Kleinpaul, J. A. (2015). Sample size for morphological traits of pigeonpea. Semina: Ciências Agrárias, 36(6), 4151-4164. doi: 10.5433/1679-0359.2015v36n6Supl2p4151
Ferreira, D. F. (2009). Estatística básica (2a ed.). UFLA.
Montgomery, D. C., & Peck, E. A. (1982). Introduction to linear regression analysis. John Wiley & Sons.
Santos, H. G., Jacomine, P. K. T., Anjos, L. H. C., Oliveira, V. A., Lumbreras, J. F., Coelho, M. R., Almeida, J. A., Araújo, J. C., Fº., Oliveira, J. B., & Cunha, T. J. F. (2018). Sistema brasileiro de classificação de solos (5a ed.). EMBRAPA.
Schabarum, D. E., Cargnelutti, A., Fº., Bem, C. M., Facco, G., Kleinpaul, J. A., & Wartha, C. A. (2018a). Sample sufficiency for mean estimation of productive traits of sunn hemp. Journal of Agricultural Science, 10(9), 209-216. doi: 10.5539/jas.v10n9p209
Schabarum, D. E., Cargnelutti, A., Fº., Lavezo, A., Follmann, D. N., Kleinpaul, J. A., Chaves, G. G., & Pezzini, R. V. (2018b). Sample size for morphological traits of sunn hemp. Journal of Agricultural Science, 10(1), 152-161. doi: 10.5539/jas.v10n1p152
Storck, L., Garcia, D. C., Lopes, S. J., & Estefanel, V. (2016). Experimentação vegetal (3a ed.). UFSM.
Teodoro, P. E., Ribeiro, L. P., Silva, F. A., Corrêa, C. C. G., Luz, R. A. A., Jr., & Torres, F. E. (2014). Sample size to estimate biomass and productivity of Canavalia ensiformis and Dolichos lablab. Revista de Ciências Agrárias, 37(3), 348-353. doi: 10.19084/rca.16834
Teodoro, P. E., Silva, C. A., Jr., Ribeiro, L. P., Silva, F. A., Corrêa, C. C. G., Zanuncio, A .S., & Torres, F. E. (2015). Sample dimension for estimation of biomass and yield of sunn (Crotalaria juncea L.) and showy rattlebox (C. spectabilis Roth.). Journal of Agronomy, 14(2), 98-101. doi: 10.3923/ja.2015.98.101
Toebe, M., Bandeira, C. T., Fortes, S. K. G., Carvalho, J. O., Tartaglia, F. L., Tambara, A. L., & Melo, P. J. (2017). Dimensionamento amostral e associação linear entre caracteres de Crotalaria spectabilis. Bragantia, 76(1), 45-53. doi: 10.1590/1678-4499.653
Toebe, M., Machado, L. N., Tartaglia, F. L., Carvalho, J. O., Bandeira, C. T., & Cargnelutti, A., Fº. (2018). Sample size for estimating mean and coefficient of variation in species of crotalarias. Anais da Academia Brasileira de Ciências, 90(2), 1705-1715. doi: 10.1590/0001-3765201820170813
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