干旱区生态环境知识资源中心(Arid): The first chromosomal analysis of bisexual populations of the Brazilian scorpion Tityus serrulatus (Scorpiones: Buthidae)

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DOI	10.1636/0161-8202-48.1.77
	The first chromosomal analysis of bisexual populations of the Brazilian scorpion Tityus serrulatus (Scorpiones: Buthidae)
	Lima, Juliana Figueiredo 1; Carvalho, Leonardo Sousa 2; Schneider, Marielle Cristina 3
通讯作者	Schneider, Marielle Cristina
来源期刊	JOURNAL OF ARACHNOLOGY
ISSN	0161-8202
EISSN	1937-2396
出版年	2020
卷号	48 期号:1 页码:77-83
英文摘要	The scorpion Tityus serrulatus Lutz & Mello, 1922 (Buthidae) is endemic to Brazil and is considered the most toxic South American scorpion species. The ample distribution of this species and its occurrence in urban areas has been attributed primarily to the parthenogenetic mode of reproduction. For a long time, only all-female T. serrulatus populations were known. Male specimens are very rare and have been recently discovered in natural environments within the Brazilian semi-arid zone. In the present study, we investigated cytogenetically bisexual populations of T. serrulatus, and compared the data with those available for parthenogenetic specimens. The diploid number (2n=12) and the general configuration of the chromosomes in male and female specimens were similar to those recorded for parthenogenetic populations. Male postpachytene cells contained chromosomes in a parallel arrangement with no differentiation of the bivalents, indicating the absence of heteromorphic sex chromosomes. However, the number of 28S rDNA sites varied between male and female specimens. Females invariably presented only one rDNA cistron, while all the males had two. This finding seems to indicate the existence of a sex-specific heteromorphism in T. serrulatus, in which the females are heterogametic and the males are the homogametic sex.
英文关键词	Cytogenetic diploid number meiosis rDNA sex chromosome system
类型	Article
语种	英语
国家	Brazil
收录类别	SCI-E
WOS记录号	WOS:000543785600007
WOS关键词	GENUS LEPOSOMA SQUAMATA ; SEX-CHROMOSOMES ; TRIVITTATUS KRAEPELIN ; CYTOGENETIC ANALYSIS ; TELOMERIC SEQUENCE ; PARTHENOGENESIS ; GYMNOPHTHALMIDAE ; HETEROCHROMATIN ; KARYOTYPE ; COMPLEX
WOS类目	Entomology
WOS研究方向	Entomology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319629
作者单位	1.Univ Fed Sao Paulo, UNIFESP, Dept Ecol & Biol Evolut, Av Prof Artur Riedel 275, BR-09972270 Diadema, SP, Brazil; 2.Univ Fed Piaui, UFPI, Campus Amilcar Ferreira Sobral,BR 343,Km 3-5, BR-64800000 Floriano, Piaui, Brazil; 3.Univ Fed Mato Grosso, UFMT, Dept Biol & Zool, Av Fernando Correa da Costa 2367, BR-78060900 Cuiaba, Mato Grosso, Brazil
推荐引用方式 GB/T 7714	Lima, Juliana Figueiredo,Carvalho, Leonardo Sousa,Schneider, Marielle Cristina. The first chromosomal analysis of bisexual populations of the Brazilian scorpion Tityus serrulatus (Scorpiones: Buthidae)[J],2020,48(1):77-83.
APA	Lima, Juliana Figueiredo,Carvalho, Leonardo Sousa,&Schneider, Marielle Cristina.(2020).The first chromosomal analysis of bisexual populations of the Brazilian scorpion Tityus serrulatus (Scorpiones: Buthidae).JOURNAL OF ARACHNOLOGY,48(1),77-83.
MLA	Lima, Juliana Figueiredo,et al."The first chromosomal analysis of bisexual populations of the Brazilian scorpion Tityus serrulatus (Scorpiones: Buthidae)".JOURNAL OF ARACHNOLOGY 48.1(2020):77-83.