INFLUENCE OF COLOR AND SIZE UPON VIGOR OF OKRA SEEDS. II - LABORATORY TESTS

JOCELY ANDREUCCETTI MAEDA; FRANCISCO ANTÔNIO PASSOS; JOSÉ BOTTER BERNARDI

 

The present study was made in the laboratory of the Seed Section,Instituto Agronômico do estado de São Paulo, Campinas, São Paulo, with seeds of okra (Abelrnoschus esculentus, Moench), cultivar Green Velvet, currently one of the most widely grown cultivars in the State of São Paulo. The factors seed size and color were studied. Seeds were classified in large and srnall, using a 12/64 inch round hole screen and within each size were visually classified in the following colors: grey, green. light-yellow to dark-brown, and black. Hence, it was formed a factorial group of treatments which was compared with breeder seeds of the two size classes, obtained by use of the same screen. The following determinations were made: standard germination test, first count germination, root lenght, color distribution, and weight of 1.000 seeds. lndependently of seed size, it was noted that the germination test was the most sensitive test in detecting quality differences among seeds of different colors, the highest germination being presented by the grey color seeds. Within small seeds, grey color seeds were superior in all parameters studied. Within large seeds, the highest vigor was presented by the black color seeds.



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