Análise dialélica entre linhagens de pepino do tipo japonês
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Data
2009-06-26
Autores
Lima, Ariane Teixeira da Silva [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O objetivo deste trabalho foi avaliar o potencial produtivo de 12 linhagens endogâmicas (S5) obtidas a partir de autofecundações sucessivas de duas populações de pepino japonês, população RY (Rensei x Yoshinari) e população TT (Tsuyataro x Taisho) e de 18 híbridos experimentais obtidos a partir do cruzamento entre linhagens no esquema de dialelo parcial circulante interpopulacional. O experimento foi realizado na Fazenda Experimental São Manuel da FCA/UNESP, Câmpus de Botucatu, no período de março de 2007 a julho de 2008. O delineamento foi em blocos ao acaso, com 33 tratamentos sendo 18 híbridos experimentais, 12 linhagens e três híbridos comerciais, com quatro repetições e cinco plantas por parcela. Foram avaliadas as características produção de frutos imaturos (número e massa) por planta, total e comercial, porcentagem de frutos comerciais, massa média de frutos comerciais, comprimento, diâmetro e relação comprimento/diâmetro dos frutos. As médias foram agrupadas pelo teste de Scott- Knott. Para todas as características de produção obtiveram-se uma linhagem (TT2) e seis híbridos experimentais (H16, H26, H11, H43, H54 e H15) tão ou mais produtivos que o melhor híbrido comercial, Tsuyataro. As heteroses dos híbridos para produção de frutos variaram de -20,90 a 45,33% com predomínio de valores positivos, o que mostrou a superioridade dos híbridos em relação à média dos genitores.
The objective of this work was to evaluate the yield potential of 12 inbred lines (S5 ) of two populations of Japanese cucumber: population RY (Rensei x Yoshinari) and population TT (Tsuyataro x Taisho) and 18 experimental hybrids obtained in a diallel partial circling inter population. The experiment was carried out in Experimental Farm São Manuel of FCA/UNESP, Campus Botucatu, in the period from March/2007 to July/2008. The design was randomized blocks, with 33 treatments, 18 experimental hybrids, 12 lines and three commercials hybrids, with four replicates and five plants per plot. The characteristics evaluated were immature fruits yield (number and weight) per plant, total and commercial; percentage of commercial fruits; average weight of commercial fruits; lenght, diameter and relation lenght/diameter of fruits. Treatment means were compared by Scott-Knott test. For all yield characteristics it was obtained a line (TT2) and six experimental hybrids (H16, H26, H11, H43, H54 e H15) as or more yielding than the best commercial hybrid, Tsuyataro. The heteroses of hybrids to yield fruit were from - 20,90 to 45,33%, most of them was positive, showing the superiority of hybrids in relation to parents average.
The objective of this work was to evaluate the yield potential of 12 inbred lines (S5 ) of two populations of Japanese cucumber: population RY (Rensei x Yoshinari) and population TT (Tsuyataro x Taisho) and 18 experimental hybrids obtained in a diallel partial circling inter population. The experiment was carried out in Experimental Farm São Manuel of FCA/UNESP, Campus Botucatu, in the period from March/2007 to July/2008. The design was randomized blocks, with 33 treatments, 18 experimental hybrids, 12 lines and three commercials hybrids, with four replicates and five plants per plot. The characteristics evaluated were immature fruits yield (number and weight) per plant, total and commercial; percentage of commercial fruits; average weight of commercial fruits; lenght, diameter and relation lenght/diameter of fruits. Treatment means were compared by Scott-Knott test. For all yield characteristics it was obtained a line (TT2) and six experimental hybrids (H16, H26, H11, H43, H54 e H15) as or more yielding than the best commercial hybrid, Tsuyataro. The heteroses of hybrids to yield fruit were from - 20,90 to 45,33%, most of them was positive, showing the superiority of hybrids in relation to parents average.
Descrição
Palavras-chave
Pepino - Produção, Pepino - Melhoramento genético, Cucumis sativus L, Yield, Breeding
Como citar
LIMA, Ariane Teixeira da Silva. Análise dialélica entre linhagens de pepino do tipo japonês. 2009. viii, 48 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Ciências Agronômicas de Botucatu, 2009.