Selective flower visitation behavior by pollinators in a radish F1 seed production field
Selective flower visitation behavior by pollinators in a radish F1 seed production field
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DOI：
10.1270/jsbbs.60.203
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发表时间：
2010-09-01
期刊：
影响因子：
2.4
通讯作者：
Ohsawa, Ryo
中科院分区：
文献类型：
--
作者：
Kobayashi, Kiwa;Tsukamoto, Syo;Ohsawa, Ryo
对于菊科作物的F-1种子生产，两个亲本系之间的异花授粉是至关重要的，并且取决于昆虫传粉者的访问行为。在萝卜细胞质雄性不育系F1代制种田，研究了不同传粉昆虫在开花期3个阶段的访花行为和受体系的种子生产力。结果表明，蜜蜂（Apis mellifera和A. cerana）选择性地访问两条线中的任一条，而食蚜蝇（属于食蚜蝇科的各种蝇）倾向于访问两条线。尽管很少观察到两条线之间的传粉者运动，但所有的花在开花后几天都收到了交叉的花粉粒。但在开花后期，增加异花授粉的蚜虫似乎会导致交叉花粉粒沉积在柱头上的数量增加。角果结实率和每角种子数在开花的三个阶段之间存在差异。这些差异可能是由于传粉者的选择性访花行为导致柱头上的异交花粉数量发生变化所致。传粉昆虫的选择性访花行为可能导致异花授粉不充分，从而导致F1代种子产量不稳定。
For F-1 seed production in Brassicaceae crops, cross-pollination between the two parental lines is vital and is dependent on the visitation behavior of insect pollinators. In a radish F-1 seed production field using cytoplasmic male sterility system, visitation behaviors of different pollinator species and seed productivity of the recipient line were investigated in three stages during the flowering. As a result, honey bees (Apis mellifera and A. cerana) selectively visited either of two lines, while syrphid flies (various flies belonging to Syrphidae) tended to visit both lines. Despite the few observations of pollinator movements between the two lines, all flowers had received cross-pollen grains a few days after flowering. But in the late stage of flowering, increased cross-pollination by syrphid flies appeared to lead to an increase in the amount of cross-pollen grains deposited on the stigmas. The percentage of pod set and the number of seeds per pod varied among the three stages of the flowering. These variations might be caused by shifts in the amount of cross-pollen grains deposited on the stigmas due to the pollinators' selective visitation behaviors. The selective visitation behavior of insect pollinators could potentially result in unstable F-1 seed production through the insufficient cross-pollination.