Data/hora: 03/06/2024 09:01:21

Biblioteca(s): 	Epagri-Sede.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	Internacional - B	
Data corrente: 	11/09/2017	
Data da última atualização: 	11/09/2017	
Autoria: 	KAVALCO, S. A. F.; CARVALHO, I. R.; NARDINO, M.; SZARESKI, V. J.; MEIRA, D.; FOLLMANN, D. N.; PELEGRIN, A. J.; FERRARI, M.; DEMARI, G. H.; SOUZA, V. Q.	
Título: 	Morphology and physiology of Tifton development.	
Ano de publicação: 	2016	
Fonte/Imprenta: 	AUSTRALIAN JOURNAL OF BASIC AND APPLIED SCIENCES, Australia, v. 10, n. 8, p. 181-187, 2016.	
Idioma: 	Inglês	
Conteúdo: 	The different genotypes of Tifton won economic importance among the forage, the higher dry mass yield, greater response to fertilization, higher digestibility, higher crude protein content and ratio of calcium and phosphorus in relation to other forages of Cynodon. The fall of the nutritional value of the function in pastures plant growth is related to the following factors: reduction in protein and phosphorus, with the aging of the plant is increased stem/leaf relationship. The aim of this study was to obtain estimates of the morphological and physiological development of Tifton genotypes, with the use of regression analysis and the breakdown of correlations in direct and indirect effects by path analysis, valued at ten different growing seasons. Methods: The study was conducted in Plant Breeding and Plant Production Laboratory, Federal University of Santa Maria, Campus Frederico Westphalen, coordinates (27º23'26 "S latitude), (53º25'43" The longitude) and 461,3m altitude in the crop year 2013. Were used for the experiments three genotypes Tifton (Cynodon spp.), they Tifton-68, Tifton-85 and Jiggs. The experimental design was a randomized block design with three replications. Each experimental unit consisted of six plants from pasture production unit at the University, were transplanted to the experimental area so that each plant were obtained from three stolons, two below and above ground. Results: By analyzing the regressions (Figure 1), where the Tifton-85 genotype was characterized by red, the Jiggs by green and Tifton-68 by the color blue, it was observed that the plant height (PH) showed linear growth during development culture, being explained by first-degree equations, with the most outstanding genotype the Tifton 85, its highest growth in relation to the others. It is observed also that the regression coefficients for the Tifton-85 genotypes (89.98%), Jiggs (92.37%) and Tifton-68 (92.58%) explained much of the variation between the evaluation seasons. Conclusions: To getting the genotypes with greater protein content, is necessary the selection plants with greater stolon diameter, leaf width, leaf length, lower number of tillers, green mass and dry mass. In a general way, the Tifton 85 genotype has greater highlight cultivation aiming greater development, resulting in a higher green mass, dry mass and chlorophyll content, however, when it aims genotypes that have high protein content, should have some caution, since the negative correlation seen between this and the traits green mass and dry mass.	
Palavras-Chave: 	Cynodon spp; genotypes behavior; indirect selection; path analysis; Regression.	
Categoria do assunto: 	F Plantas e Produtos de Origem Vegetal	
URL: 	http://intranetdoc.epagri.sc.gov.br/producao_tecnico_cientifica/DOC_39776.pdf	
Registro original: 	Epagri-Sede (Epagri-Sede)	
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