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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

CARACTERÍSTICAS ANATÔMICAS DE LÂMINAS FOLIARES VERSUS POTENCIAL QUALITATIVO DE GENÓTIPOS DE Paspalum spp / BLADES OF ANATOMICAL FEATURES LEAF VERSUS POTENTIAL QUALITATIVE GENOTYPES OF Paspalum spp

Galdeia, Elaine Costa 29 August 2014 (has links)
Submitted by Cibele Nogueira (cibelenogueira@ufgd.edu.br) on 2016-04-27T18:06:07Z No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) ELAINEGALDEIA.pdf: 962237 bytes, checksum: 3b41ec5db03122e7d9c0c481589f9ffc (MD5) / Made available in DSpace on 2016-04-27T18:06:07Z (GMT). No. of bitstreams: 2 license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5) ELAINEGALDEIA.pdf: 962237 bytes, checksum: 3b41ec5db03122e7d9c0c481589f9ffc (MD5) Previous issue date: 2014-08-29 / The experiment was conducted on the premises of the Federal University of Grande Dourados –UFGD, Dourados-MS, from November 2012 to November 2013 were studied in 19 genotypes of forage grasses, and 17 accessions of Paspalum spp., Urochloa brizantha. Palisade, and Panicum maximum cv. Tanzania. The aim of the study was to characterize the genotypes in relation to anatomical attributes and chemical composition of leaf blades and from these assessments discriminate the most promising materials as the qualitative potential, in order to support the improvement program. The experimental design was a randomized complete block with five replications. There were three cuts of forage for evaluations. The mean anatomical and chemical characteristics were compared by the Scott-Knott test at 5% probability by the computer program SAEG (2007). Analysis of linear correlation between chemical and anatomical characteristics were obtained using the computer application (SAS 2007). Considering the levels of CP, NDF and digestibility of forage materials that deserve mention were BRA23566, BRA1112 and BRA22540 with CP concentration high and low NDF and high IVDMD. Based on studies of anatomical characterization genotypes that were stood BRA23566, BRA23558, BRA1112, BRA22811. It was concluded that the most promising genotypes regarding the qualitative potential would be the BRA23566 and BRA1112 and that would be needed further evaluation of the chemical composition of the cell wall to indicate which components influence the low digestibility of the genotypes tested. / O experimento foi conduzido nas dependências da Universidade Federal da Grande Dourados - UFGD, Dourados-MS, no período de novembro de 2012 a maio de 2013. Estudaram-se 19 genótipos de gramíneas forrageiras, sendo 17 acessos de Paspalum spp., Urochloa brizantha cv. Marandu, e Panicum maximum cv. Tanzânia-1. O objetivo do trabalho foi caracterizar os genótipos quanto aos atributos anatômicos e de composição química das lâminas foliares e a partir dessas avaliações discriminar os materiais mais promissores quanto ao potencial qualitativo, a fim de subsidiar o programa de melhoramento. O delineamento experimental utilizado foi de blocos casualizados com cinco repetições. Realizaram-se três cortes da forragem para as avaliações. As médias das características anatômicas e químicas foram comparadas pelo teste de Scott-Knott a 5% de probabilidade por meio do programa computacional SAEG (2007). As análises de correlação linear entre as características químicas e anatômicas foram obtidas utilizando-se o aplicativo computacional SAS (2007). Considerando os teores de PB, FDN e a digestibilidade da forragem, os materiais que merecem destaque foram BRA23566, BRA1112 e BRA22540 com teores de PB alto e baixo FDN e elevada DIVMS. Com base nos estudos de caracterização anatômica os genótipos que se destacaram foram BRA23566, BRA23558, BRA1112, BRA22811. Conclui-se que os genótipos mais promissores quanto ao potencial qualitativo seriam o BRA23566 e BRA1112 e que seriam necessárias outras avaliações da composição química da parede celular para indicar quais os componentes que influenciaram na baixa digestibilidade dos genótipos avaliados.

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