Django Jesus Dantas

Divergência genética entre linhagens de melão do grupo Inodorus

The objective of this work was to study the genetic divergence among lines of Pele de Sapo melon and among lines of Honey Dew melon. Ten lines of Pele de Sapo melon and ten lines of Honey Dew melon were evaluated, in separate experiments, both carried in a randomized block design with three replications. The divergence was estimated by the Mahalanobis distance. The methods of Tocher and UPGMA were used for the grouping of the lineages. For the lineages Pele de Sapo, genetic divergence was verified with the formation of four five groups according to the methods of grouping of Tocher and UPGMA, respectively. Must be made crosses among lines PS-01, PS-05 and PS-07 or between theses and other lines of group I. For the lineages of Honey Dew, the formation of the same three groups was verified in the methods of grouping of Tocher and UPGMA. The group II formed by lines OF-01 and OF-02; the group III by line OF-03 and first group by other lines. Considering Honey Dew lines, suggest crosses of lines OF-01 and OF-02 with other lines. The line OF-03 resembling to lines OF-01 and OF-02 must be crossed with the lines of group I.

Adubação fosfatada na produção de goiabeiras ‘Paluma’ e ‘Pedro Sato’ no Distrito Irrigado do Baixo Açu/RN

Com o objetivo de avaliar a adubacao fosfatada sobre as caracteristicas de producao das goiabeiras (Psidium guajava L.),’Paluma’ e ‘Pedro Sato’ conduziu-se experimento em campo, durante o ciclo de cultivo agricola, 2008/2009, utilizando-se cultivares Paluma e Pedro Sato. As plantas com idade de tres anos foram cultivadas em vertissolo eutrofico, com espacamento de 6x5 e irrigadas por aspersao, sendo a agua fornecida de acordo com a evapotranspiracao potencial de referencia (ETo) media dos ultimos cinco dias, utilizando-se o coeficiente da cultura Kc de 0,60 e conforme a equacao de Penmam-Monteith. no municipio de Alto do Rodrigues, estado do Rio Grande do Norte. O delineamento experimental foi inteiramente casualizado (DIC) com dez tratamentos resultantes de duas cultivares (’Paluma’ e ‘Pedro Sato’) e cinco doses de superfosfato simples (0; 100; 200; 300 e 400 g/planta),com quatro repeticoes e cinco plantas por parcela, sendo utilizada para analise tres plantas centrais (parcela util). Avaliou-se o numero total de frutos, numero de frutos comercializaveis, numero de frutos nao comercializaveis, producao total de frutos, producao de frutos comercializaveis, e producao de frutos nao comercializaveis. Nao houve efeito significativo das doses de adubacao fosfatada para as caracteristicas estudadas nas duas cultivares.