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RESUMO: Nos plantios comerciais brasileiros, o meio de propagacao mais utilizado para o mamoeiro e o uso de semente, uma vez que e a melhor maneira de propagacao. Objetivou-se atraves da realizacao deste trabalho avaliar o indice de germinacao de sementes de duas variedades de mamao (Carica papaya L.) em substrato Bioplant®, que sao as variedades mamao Havai e mamao Formosa, evidenciando qual variedade houve acrescimo significativo na germinacao e o desenvolvimento mais eficiente no desempenho da plântula. A semeadura das sementes ocorreu em bandejas de isopor contendo 200 celulas, sendo utilizado para cada variedade 20 celulas, semeadas 3 sementes em cada, sob o substrato Bioplant®. As sementes de mamao Formosa mostraram maior adaptacao sob o substrato Bioplant®, sendo seu indice de germinacao maior do que o mamao Havai e mostrando mais vigor nas condicoes que ambas as variedades foram submetidas. Dessa forma, o mamao Formosa mostrou melhor resposta as condicoes proporcionadas pelo substrato em relacao ao mamao Havai. Palavras-chave: Sementes, Teste de germinacao, Fruticultura..  ABSTRACT: In Brazilian commercial plantations, one form of propagation most used for papaya is the use of seed, since it is a better way of propagation. This work objected to evaluate the seed germination index of two varieties of papaya (Carica papaya L.) on the Bioplant® substrate, which are the Havai and papaya Formosa varieties, evidencing which variety was a significant increase in germination and the most efficient development in the seedling performance.  Seed sowing occurred in Styrofoam trays containing 200 cells, being used for each variety 20 cells, seeded 3 seeds each under the Bioplant® substrate. The seeds of papaya Formosa showed greater adaptation under the substrate Bioplant®, being its germination index greater than the papaya Havai and showing more vigor in the conditions that both were submitted. In this way, the Papaya Formosa showed better response the conditions provided by the substrate Bioplante in relation to the Havai papaya.. Keywords: Seeds, Germination test, Fruticulture.

Índice de germinação de sementes de duas variedades de mamão (Carica papaya L.) em substrato Bioplant®