Study of the length of the mouthparts of Africanized, Caucasian and Africanized/Caucasian honey bee crosses, and relationships between glossa sizeand food gathering behavior
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Data
1998-12-01
Autores
Pignata, Maria Izabel Barnez
Stort, Antonio Carlos [UNESP]
Malaspina, Osmar [UNESP]
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Sociedade Brasileira de Genética
Resumo
Os comprimentos das peças que constituem o aparelho bucal, glossa, paraglossa, estipite, gálea, palpo labial, palpo maxilar, cardo, lorum, mento e pré-mento foram estudados a nível unidimensional em abelhas caucasianas, africanizadas e nos descendentes F1. Somente a paraglossa, estipite, gálea, palpo maxilar, mento e pré-mento mostraram ser diferentes entre esses 2 tipos de abelhas. Essas 6 variáveis foram estudadas nos descendentes F1, tendo sido utilizados 2 tipos de cruzamentos: rainhas caucasianas x machos africanizados (cruzamento 1) e rainhas africanizadas x machos caucasianos (cruzamento 2). Análises multidimensionais também foram realizadas, tendo sido obtidas as distâncias generalizadas de Mahalanobis (D2) entre os parentais e os descendentes F1. Tanto nas análises unidimensionais como nas multidimensionais houve aparente dominância das abelhas africanizadas, mas o número de genes não pôde ser conhecido porque só havia a geração F1 e não houve controle da heterozigosidade das 2 colônias parentais. Os cálculos dos coeficientes de correlações de Spearman mostraram que as abelhas com glossae mais longas coletaram mais xarope de açúcar e voaram mais lentamente da colônia para a fonte de alimento.
The lengths of the mouthparts of bees, the glossa, paraglossa, stipes, galea, labial palpus, maxillary palpus, cardo, lorum, mentum and prementum, were studied in Caucasian and Africanized bees and in their F1 descendants. Only the lengths of the paraglossa, stipe, galea, mentum, prementum and maxillary palpus differed significantly between these two bee types. These six variables were studied in the F1 descendants of two types of crosses, i.e., Caucasian queens x Africanized males (cross 1) and Africanized queens x Caucasian males (cross 2). Multidimensional analyses were also performed and the generalized Mahalanobis distances (D2) between the F1 descendants and the parental lines were determined. There was an apparent dominance of Africanized bees in both unidimensional and multidimensional analyses. Correlation analysis showed that bees with longer glossae collected more food (sugar syrup) and flew more slowly from the colony to the food source.
The lengths of the mouthparts of bees, the glossa, paraglossa, stipes, galea, labial palpus, maxillary palpus, cardo, lorum, mentum and prementum, were studied in Caucasian and Africanized bees and in their F1 descendants. Only the lengths of the paraglossa, stipe, galea, mentum, prementum and maxillary palpus differed significantly between these two bee types. These six variables were studied in the F1 descendants of two types of crosses, i.e., Caucasian queens x Africanized males (cross 1) and Africanized queens x Caucasian males (cross 2). Multidimensional analyses were also performed and the generalized Mahalanobis distances (D2) between the F1 descendants and the parental lines were determined. There was an apparent dominance of Africanized bees in both unidimensional and multidimensional analyses. Correlation analysis showed that bees with longer glossae collected more food (sugar syrup) and flew more slowly from the colony to the food source.
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Genetics and Molecular Biology. Sociedade Brasileira de Genética, v. 21, n. 4, p. -, 1998.