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Variação genética oculta em alface da cultivar salad bowl (Concealed genetic variation in salad bowl lettuce)

Warwick Estevam Kerr; Pedro Laerte S. Leio; Francisco de Jesus Campos; José Ribamar Santos-Filho

Departamento de Biologia, Universidade Federal do Maranhão, Largo dos Amores, 21, 65000 São Luiz, MA, Brasil. Enviar correspondência a W.E.K.

ABSTRACT

A dark green mutant of the lettuce cultivar "Salad Bowl" produced 141 plants. The offspring demonstrated that the mutant plant was heterozygous for about 11 genes (22 alleles), namely: 2 for leaf color, 2 for resistance to Rhizoctonia solani, 1 for early flowering, 1 for spiny leaves, 1 for branched inflorescences, 3 for light yellow flowers, and 1 for smooth leaves. These genes reveal either a high rate of mutation, or high heterotic value or both.

Keywords: genetic; variation; salad; bowl; lettuce.

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