desempenho agroindustrial de cultivares de cana-de-açúcar na zona da mata litoral sul de pernambuco agroindustrial performance of sugar cane cultivars in the coastal-forest zone of pernambuco

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ID: 219508
2009
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Abstract
Objetivou-se, neste trabalho, avaliar a variabilidade genética de alguns caracteres da planta e o desempenho agroindustrial em cultivares de cana-de-açúcar. O delineamento experimental foi o de blocos casualizados, com quatro blocos e dezesseis cultivares. As parcelas foram formadas por cinco sulcos de 8,0 m de comprimento, espaçados de 1,0 m, caracterizando uma área útil de 40 m². Foram avaliadas as variáveis toneladas de cana por hectare (TCH), toneladas de pol por hectare (TPH), pol na cana (PC), fibra % cana (FIB), brix na cana (BC) e pureza na cana (PUR). O TCH é o componente mais influenciado pelos ciclos de colheita da lavoura de cana-de-açúcar e o menos expressivo para os demais caracteres estudados. As variáveis TCH e TPH refletiram a maior parte da variação fenotípica observada devida às causas genéticas, indicando êxito na seleção no melhoramento desses caracteres. Os genótipos SP78-4764, SP86-0621 e SP86-127 demonstraram potencial produtivo do ponto de vista agroindustrial. O efeito de ciclo de colheita da cana foi altamente significativo indicando o comportamento específico entre as cultivares durante os cortes da cana.
The aim of this work was to evaluate the genetic variability of some characters of the plant and the agroindustrial performance of sugar cane cultivars. The experimental design was the complete randomized blocks with four replications and 16 cultivars, being four of them used as check varieties. The plots were formed by five furrows of 8.0 m length, spaced 1.0 m, characterizing a useful area of 40 m². The variables evaluated were the tons of cane per hectare (TCH), tons of pol per hectare (TPH), pol in the cane (PC), % cane fiber (FIB), brix in the cane (BC) and purity in the cane (PUR). The TCH is the component most influenced by the harvest cycles of the sugar cane farming and the least expressive for the other studied characters. The variables TCH and TPH reflected most of the phenotypic variation observed due to genetic causes, indicating success in the selection for the improvement of these characters. The genotypes SP78-4764, SP86-0621, and SP86-127 demonstrated productive potential from the agroindustrial point of view. The effect of the cane cut cycle was highly significant, indicating specific behaviors among the cultivars during the cane harvest.
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Authors ;Luiz José Oliveira Tavares de Melo;Francisco José de Oliveira;Gerson Quirino Bastos;Clodoaldo José da Anunciação Filho;Odemar Vicente dos Reis
Journal information and software technology
Year 2009
DOI
10.1590/S1413-70542009000300004
URL
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000300004
Keywords
genotypes improvement melhoramento

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