Productive performance and vitamin c content in ananas comosus l. merrill submited to different periods of bloom induction

Productive Performance and Vitamin C Content in Ananas comosus L. Merrill Submited to Different Periods of Bloom Induction

W.R.S. Cock1 and N. R. Leal2.
1Instituto Nacional de Colonização e Reforma Agrária – INCRA SR(20)
Vilha Velha, Espírito Santo, Brazil
2Laboratório de Melhoramento Genético Vegetal, Centro de Ciências e Tecnologias Agropecuárias
Universidade Estadual do Norte Fluminense Darcy Ribeiro
Campos dos Goytacazes, Rio de Janeiro, Brazil

Keywords: Ananas comosus L. Merrill, Vitamin C (L-ascorbic acid).

ABSTRACT
The aims of this study was to analyse the production of pineapple cultivars ‘Perola’ and 'Smooth Cayenne', using slips weighting approximately 250g, under sprinkler irrigation after artificial bloom induction with ethefon at eight, nine, ten, eleven and twelve months after the sowing. The fruits were harvested six months after the flowering induction in April, May, June, July and August months of 2003 an analyzed the fruit weight without crown (FWC), the firmness of the pulp, the Brix/Acidity ratio, the pH and vitamin C content (VC). Through the study of adaptability and yield stability by Lin and Bins (1988) methodology, information from the productive performance of these genotypes cultivars to determine the best time to bloom induction was looked for. For the FWC characteristic, the cultivar 'Smooth Cayenne' showed a Pi 284,9424 and 'Pérola' Pi 17019,3931, showing the best productive performance of 'Smooth Cayenne', even in unfavorable environments, with Pi equal to 0.0 in this condition. For the VC characteristic, there was a reversal, so we can detaching the good performance of 'Pérola', with 31.125 mg 100-1g of average and Pi equal to 0.0 against 10.804 mg 100-1g of average and Pi 250.1294 in the 'Smooth Cayenne'. In the decomposition of Pi in favorable and unfavorable environments, the magnitude of the 'Pérola' was 0.0 in both conditions, demonstrating high performance in the production of vitamin C.

INTRODUCTION
In