“浙农大 1号”意蜂 (A .m .ligusticaEa)分别与喀尼鄂拉蜂 (A .m .carnica)、卡尔巴阡蜂 (A .m .carpati ca)、高加索蜂 (A .m .caucasica)、乌克兰蜂 (A .m .acervorum)、东北黑蜂 (A .m .spp .)进行正反杂交组配。在山东玉米花期 ,...“浙农大 1号”意蜂 (A .m .ligusticaEa)分别与喀尼鄂拉蜂 (A .m .carnica)、卡尔巴阡蜂 (A .m .carpati ca)、高加索蜂 (A .m .caucasica)、乌克兰蜂 (A .m .acervorum)、东北黑蜂 (A .m .spp .)进行正反杂交组配。在山东玉米花期 ,考察这 6个西方蜜蜂蜂种及 10个正反杂交组合的 95个试验蜂群的蜂花粉生产性能 ,分析杂交一代的杂种优势。结果表明 ,K是 6个纯种中蜂花粉产量最高的蜂种 ,Ea位居第二 ,Ea×D是所有纯种和杂交组合中蜂花粉产量最高的蜂种 ,是培育蜂花粉高产组合的蜂种。杂交组合Ea×D和W×Ea的蜂花粉生产性能具有明显的杂种优势 ,其杂种优势率分别达到 49.5 %和 2 1.1%,其他展开更多
The stinging response thresholds of individual European and Africanized worker honeybees (Apis mellifera L.) were analyzed. Workers of each genotype performing defense (guard and soldier bees) and non-defense (nest an...The stinging response thresholds of individual European and Africanized worker honeybees (Apis mellifera L.) were analyzed. Workers of each genotype performing defense (guard and soldier bees) and non-defense (nest and forager bees) associated tasks were collected and exposed to an electric stimulus of 0.5 mA, and the time they took to sting a leather substrate was recorded. Africanized bees had significant lower thresholds of response than European bees. Guards and soldiers were faster to sting than nest and forager bees for the Africanized genotype, whereas for the European genotype, guards stung significantly faster than bees of the other three task groups. This is the first study that shows that individual bees specialized in two defensive tasks also have a lower response threshold for stinging. Our results fit a model of division of labor based on differences in response thresholds to stimuli among workers of different genotypes and task groups.展开更多
文摘The stinging response thresholds of individual European and Africanized worker honeybees (Apis mellifera L.) were analyzed. Workers of each genotype performing defense (guard and soldier bees) and non-defense (nest and forager bees) associated tasks were collected and exposed to an electric stimulus of 0.5 mA, and the time they took to sting a leather substrate was recorded. Africanized bees had significant lower thresholds of response than European bees. Guards and soldiers were faster to sting than nest and forager bees for the Africanized genotype, whereas for the European genotype, guards stung significantly faster than bees of the other three task groups. This is the first study that shows that individual bees specialized in two defensive tasks also have a lower response threshold for stinging. Our results fit a model of division of labor based on differences in response thresholds to stimuli among workers of different genotypes and task groups.
