Lachowska D, Rozek M, Holecová M, Karagyan G
Department of Experimental Zoology, Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Sławkowska 17, 31-016 Kraków, Poland.
Folia Biol (Krakow). 2001;49(1-2):49-52.
Cytogenetic investigations were carried out on seven species of bisexual weevils from five subfamilies. The following numbers of chromosomes were found in individual species: 2n = 22, n male = 10 + Xyp in Ptochus porcellus Boh. (Otiorhynchinae); 2n = 40, n male = 19 + Xyp in Larinodontes turbinatus Gyll. (Cleoninae); 2n = 26, n male = 12 + Xyp in Curculio pellitus (Boh.) (Curculioninae); 2n = 30, n male = 14 + Xyp in Acalles camelus (F.), Acalles echinatus (Germ.), Acalles hypocrita Boh. (Cryptorhynchinae), and 2n = 40, n male = 19 + Xyp in Cionus hortulanus (Foucr.) (Mecininae). The heterochromosomes of all the examined species form, in the first meiotic metaphase, a parachute bivalent. The chromosome number and sex determining system of six species and two genera are described for the first time.
对来自五个亚科的七种两性象鼻虫进行了细胞遗传学研究。在各个物种中发现了以下染色体数目：在波氏托氏象鼻虫（Ptochus porcellus Boh.）（耳喙象亚科）中，2n = 22，雄性n = 10 + Xyp；在陀螺拉氏象鼻虫（Larinodontes turbinatus Gyll.）（克莱昂象亚科）中，2n = 40，雄性n = 19 + Xyp；在梨形果象甲（Curculio pellitus (Boh.)）（象甲亚科）中，2n = 26，雄性n = 12 + Xyp；在骆驼长角象（Acalles camelus (F.)）、棘长角象（Acalles echinatus (Germ.)）、伪长角象（Acalles hypocrita Boh.）（隐喙象亚科）中，2n = 30，雄性n = 14 + Xyp；在园圃锥象（Cionus hortulanus (Foucr.)）（麦象亚科）中，2n = 40，雄性n = 19 + Xyp。在第一次减数分裂中期，所有被检查物种的异染色体形成一个降落伞二价体。首次描述了六个物种和两个属的染色体数目和性别决定系统。
