Campbell B C
Western Regional Research Center, USDA-ARS, Albany, California 94710.
Curr Microbiol. 1993 Mar;26(3):129-32. doi: 10.1007/BF01577365.
Whiteflies (family Aleyrodidae) possess heritable eubacterial endosymbionts sustained in specialized organ-like structure called mycetomes. Comparisons of distances between the ash whitefly, Siphoninus phillyreae, and two biotypes ("A" and "B") of the sweetpotato whitefly, Bemisia tabaci, based on sequence analysis of genes for 18S rRNAs (rDNAs), were equivalent to the distances represented by the 16S rDNAs of their respective endosymbionts. This finding indicates that evolutionary divergence in whitefly hosts and their endosymbionts is congruent. The nucleotide sequences of the 18S rDNAs and endosymbiont 16S rDNAs indicate the two biotypes of B. tabaci are the same species.
粉虱（粉虱科）拥有可遗传的真细菌内共生体，这些内共生体存在于一种称为菌胞体的特殊器官样结构中。基于18S核糖体RNA（rDNA）基因的序列分析，对灰粉虱（Siphoninus phillyreae）与烟粉虱（Bemisia tabaci）的两种生物型（“A”和“B”）之间的距离进行比较，其结果与各自内共生体16S rDNA所代表的距离相当。这一发现表明粉虱宿主与其内共生体的进化分歧是一致的。18S rDNA和内共生体16S rDNA的核苷酸序列表明，烟粉虱的两种生物型属于同一物种。
