Pre-copulation intervals, copulation frequencies, and initial progeny sex ratios in two biotypes of whitefly, Bemisia tabaci
Pre-copulation intervals, copulation frequencies, and initial progeny sex ratios in two biotypes of whitefly, Bemisia tabaci
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两种烟粉虱生物型的交配前间隔、交配频率和初始后代性别比
DOI：
10.1111/j.1570-7458.2008.00777.x
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发表时间：
2008-12-01
影响因子：
1.9
通讯作者：
Liu, Shu-Sheng
中科院分区：
文献类型：
--
作者：
Luan, Jun-Bo;Ruan, Yong-Ming;Liu, Shu-Sheng
烟粉虱Bemisia tabaci（Gennadius）是一个种复合体，其系统分类需要遗传类群间的控制杂交试验。准确的信息，交配前的间隔，交配频率，以及新出现的成年人的卵子受精的初始频率是至关重要的设计程序，收集这些实验所需的处女成人。在文献中，报道了B之间的相当大的变化。烟粉虱种群，相对于交配前间隔的长度和卵受精的初始频率。在这里，我们用录像的方法连续观察了地中海/小亚细亚/非洲（B生物型）和亚洲II（ZHJ 1生物型）的交配行为的B。烟粉虱我们还记录了卵子受精的初始频率，由后代的性别决定。当成虫以雌雄成对的方式在棉株叶片上笼中时，最早的交配事件发生在羽化后2-6 h;在羽化后12 h，56-84%的雌性至少交配一次，并且几乎所有（92-100%）在羽化后36 h至少交配一次。雌性和雄性都反复交配。大约80%和20%的交配事件发生在暗期和暗期，分别。羽化后72 h，B型和ZHJ 1型的雌虫平均交配次数分别为6.1次和3.9次。当成虫在羽化后1-13小时在植物上成群地被关在笼子里时，在此期间沉积的卵的30-35%被受精，并且大约90%的雌性在13小时结束时被受精。尽管两个遗传群体的交配时间在细节上有所不同，但结果表明，B。烟粉虱成虫可在羽化后2-6小时开始交配，大多数雌性烟粉虱可在羽化当天受精。
The whitefly Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae) is a species complex, and its systematic classification requires controlled crossing experiments among its genetic groups. Accurate information on pre-copulation intervals, copulation frequencies, and initial frequency of egg fertilization of newly emerged adults is critical for designing procedures for collecting the virgin adults necessary for these experiments. In the literature, considerable variation is reported between B. tabaci populations, with respect to the length of the pre-copulation interval and the initial frequency of egg fertilization. Here, we used a video-recording method to observe continuously the copulation behaviour of the Mediterranean/Asia Minor/Africa (B biotype) and the Asia II (ZHJ1 biotype) groups of B. tabaci. We also recorded the initial frequency of egg fertilization, as determined by the sex of the progeny. When adults were caged in female-male pairs on leaves of cotton plants, the earliest copulation events occurred 2-6 h after emergence; at 12 h after emergence 56-84% of the females had copulated at least once, and nearly all (92-100%) had copulated at least once by 36 h after emergence. Both females and males copulated repeatedly. Approximately 80 and 20% of copulation events occurred during the photophase and scotophase, respectively. By 72 h post-emergence, the females of the B and ZHJ1 biotypes had copulated on average 6.1 and 3.9 times, respectively. When adults were caged in groups on plants 1-13 h after emergence, 30-35% of the eggs deposited during this period were fertilized, and approximately 90% of females were fertilized by the end of the 13 h. Although timing of copulation differed in detail between the two genetic groups, the results demonstrate that B. tabaci adults can start to copulate as early as 2-6 h post-emergence and the majority of females can become fertilized on the day that they emerge.