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Fruit characterization and seed polyembryony of 'flying dragon' and of hybrids citrus rootstocks

The diversification of the rootstocks is a reality at the moment of the brazilian citriculture, due many problems that have been recurring. In this context some alternatives are already a reality as the use of some hybrids produced through conventional breeding and varieties already used in citrus. This work was carried out aiming to characterize the fruit and evaluate the germination and the polyembryony of the seed. For characterization were randomly collected 12 samples of each rootstock. In assessing of germination percetage, germination speed index and polyembryony was used factorial scheme 5 (the rootstocks: hybrid UFLAD-2, UFLAD-3 E UFLAD-4, citrumeleiro 'Swingle' and Poncirus trifoliata var. monstrosa 'Flying Dragon ') x 2 (with and without removing the seedcoat), four replications were used. According to the results it is concluded that the fruit size did not influence in the seed yield. The removal of the seedcoat accelerated the time of seed germination in all the rootstocks and provided a higher germination percentage. The polyembryony doesn't affect the process of seed germination. The rootstocks UFLAD-2, UFLAD-3, UFLAD-4 and citrumeleiro 'Swingle' have potential for use in the production of the rootstocks.

Propagation; citriculture; seedlings


Sociedade Brasileira de Fruticultura Via de acesso Prof. Paulo Donato Castellane, s/n , 14884-900 Jaboticabal SP Brazil, Tel.: +55 16 3209-7188/3209-7609 - Jaboticabal - SP - Brazil
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