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Previous issue date: 2014-09-19 / Neste trabalho foram avaliadas a produtividade e as caracter?sticas t?cnicas das fibras dos acessos de algod?o colorido existentes no Banco de Germoplasma da EMBRAPA Algod?o. Buscou-se, atrav?s do programa de melhoramento, elevar a resist?ncia, finura, comprimento e a uniformidade das fibras de algod?o, bem como estabilizar a colora??o das fibras nas tonalidades BRS Rubi, BRS Top?zio, BRS Verde e BRS Marrom e elevar a sua produtividade no campo. Primeiramente, foi feita a sele??o individual com teste de prog?nies das sementes, e, posteriormente, o m?todo de hibrida??o seguido de sele??o geneal?gica para se obter varia??es nas tonalidades de cores. As variedades BRS Verde, BRS Rubi, BRS Marrom e BRS Top?zio foram produzidas, analisadas e comparadas com os algod?es existentes na regi?o. As propriedades das fibras foram dimensionadas nos aparelhos Classifiber, NATI, Pressley, Micronaire. As fibras branca e top?zio, foram as que apresentaram maior comprimento 32-34mm e maior resist?ncia 7,94 lb/mg e 7,97 lb/mg respectivamente, al?m de apresentam finura com menor valor de ?ndice micronaire 3,71?g/pol e 3,73 ?g/pol e baixo ?ndice de fibras curtas. Os resultados foram bastantes promissores para utiliza??o dos algod?es geneticamente melhorados ind?stria t?xtil. / In this work evaluate the technical characteristics of the fibers grown in settlements
Guamar?, colored cotton seeds were donated existing in the Germplasm Bank of Embrapa
Cotton. We sought through the breeding program, raising the resistance, fineness, length and
uniformity of cotton fibers, as well as stabilize the staining of fibers in the BRS Topaz, BRS
Brown and BRS Green shades and raise their productivity in the field. First, the individual
selections to test progeny seeds, and thereafter the hybridization method followed by family
selection to obtain variations in the color tones were performed. The BRS Topaz, BRS Brown
and BRS Green varieties were produced, analyzed and compared with existing cottons in the
region which is the White cotton. The properties amount of impurities and neps, length, length
uniformity, short fiber content, fineness and tensile strength of the fibers were sized in
Classifiber, NATI, Pressley and Micronaire devices. 10 trials each with 10 tests for all four
fiber types were carried out. The White and Topaz fibers showed greater length (32-34mm)
and greater resistance (7.94 lb/mg and 7.97 lb/mg respectively) and showed finesse with
lower micronaire index 3,71?g/inch and 3, 73?g/inch and a low rate of short fibers. The
results were very promising for the use of genetically improved cotton in the manufacturing
of fabric and yarn in the textile industry. The fibers were brown colored cotton used in the
manufacture of a composite fiber with thermoplastic resin
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/19425 |
| Date | 19 September 2014 |
| Creators | C?mara, Nailton Torres |
| Contributors | 25094955420, http://lattes.cnpq.br/0801747108308706, Lima, Jos? de Anchieta, 36973637434, http://lattes.cnpq.br/0742445504420593, Aquino, Marcos Silva de, 47426632415, http://lattes.cnpq.br/8780485157382325, Lima Filho, Neil de Oliveira, 32265387487, http://lattes.cnpq.br/3644358236543495, Melo, Mois?s Vieira de, Souza, Luiz Guilherme Meira de |
| Publisher | Universidade Federal do Rio Grande do Norte, P?S-GRADUA??O EM ENGENHARIA MEC?NICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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