scholarly journals Preservation of the Y Transcriptome in a 10-Million-Year-Old Plant Sex Chromosome System

2011 ◽  
Vol 21 (17) ◽  
pp. 1470-1474 ◽  
Author(s):  
Roberta Bergero ◽  
Deborah Charlesworth
Keyword(s):  
Sex Chromosome ◽  
Sex Chromosome System ◽  
Plant Sex

scholarly journals A high-throughput segregation analysis identifies the sex chromosomes of Cannabis sativa

2019 ◽  
Author(s):  
Djivan Prentout ◽  
Olga Razumova ◽  
Bénédicte Rhoné ◽  
Hélène Badouin ◽  
Hélène Henri ◽  
...  
Keyword(s):  
Sex Chromosomes ◽  
Segregation Analysis ◽  
Cannabis Sativa ◽  
Sex Chromosome ◽  
Probabilistic Method ◽  
Female Offspring ◽  
Single Chromosome ◽  
Sex Chromosome System ◽  
Plant Sex Chromosomes ◽  
Plant Sex

AbstractCannabis sativa-derived tetrahydrocannabinol (THC) production is increasing very fast worldwide. C. sativa is a dioecious plant with XY chromosomes, and only females (XX) are useful for THC production. The C. sativa sex chromosomes sequence would improve early sexing and better management of this crop; however, the C. sativa genome projects failed to identify the sex chromosomes so far. Moreover, dioecy in the Cannabaceae family is ancestral, C. sativa sex chromosomes are potentially old and thus very interesting to study as little is known about the last steps of sex chromosome evolution in plants. Here we RNA-sequenced a C. sativa family (2 parents and 10 male and female offspring) and performed a segregation analysis for all C. sativa genes using the probabilistic method SEX-DETector. We identified >500 sex-linked genes. Mapping of these sex-linked genes to a C. sativa genome assembly identified a single chromosome pair with a large non-recombining region. Further analysis of the >500 sex-linked genes revealed that C. sativa has a strongly degenerated Y chromosome and represents the oldest plant sex chromosome system documented so far. Our study revealed that old plant sex chromosomes can have large non-recombining regions and be very differentiated and still be of similar size (homomorphic).

scholarly journals Analysis and Evolution of Two Functional Y-Linked Loci in a Plant Sex Chromosome System

2001 ◽  
Vol 18 (12) ◽  
pp. 2162-2168 ◽  
Author(s):  
Ivan Atanassov ◽  
Catherine Delichère ◽  
Dmitry A. Filatov ◽  
Deborah Charlesworth ◽  
Ioan Negrutiu ◽  
...  
Keyword(s):  
Sex Chromosome ◽  
Sex Chromosome System ◽  
Plant Sex

scholarly journals Gene Loss from a Plant Sex Chromosome System

2015 ◽  
Vol 25 (9) ◽  
pp. 1234-1240 ◽  
Author(s):  
Roberta Bergero ◽  
Suo Qiu ◽  
Deborah Charlesworth
Keyword(s):  
Gene Loss ◽  
Sex Chromosome ◽  
Sex Chromosome System ◽  
Plant Sex

scholarly journals Evolution of a Multiple Sex-Chromosome System by Three-Sequential Translocations among Potential Sex-Chromosomes in the Taiwanese Frog Odorrana swinhoana

Cells ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 661
Author(s):  
Ikuo Miura ◽  
Foyez Shams ◽  
Si-Min Lin ◽  
Marcelo de Bello Cioffi ◽  
Thomas Liehr ◽  
...  
Keyword(s):  
Sex Chromosomes ◽  
Rare Case ◽  
Sex Chromosome ◽  
Sex Chromosome System ◽  
Brown Frog ◽  
Male Specific

Translocation between sex-chromosomes and autosomes generates multiple sex-chromosome systems. It happens unexpectedly, and therefore, the evolutionary meaning is not clear. The current study shows a multiple sex chromosome system comprising three different chromosome pairs in a Taiwanese brown frog (Odorrana swinhoana). The male-specific three translocations created a system of six sex-chromosomes, ♂X1Y1X2Y2X3Y3 -♀X1X1X2X2X3X3. It is unique in that the translocations occurred among three out of the six members of potential sex-determining chromosomes, which are known to be involved in sex-chromosome turnover in frogs, and the two out of three include orthologs of the sex-determining genes in mammals, birds and fishes. This rare case suggests sex-specific, nonrandom translocations and thus provides a new viewpoint for the evolutionary meaning of the multiple sex chromosome system.

scholarly journals Karyotype description of three species of Loricariidae (Siluriformes) and occurrence of the ZZ/ZW sexual system in Hemiancistrus spilomma Cardoso & Lucinda, 2003

2006 ◽  
Vol 4 (1) ◽  
pp. 93-97 ◽  
Author(s):  
Renildo Ribeiro de Oliveira ◽  
Issakar Lima Souza ◽  
Paulo Cesar Venere
Keyword(s):  
Chromosome Pair ◽  
Sex Chromosome ◽  
Sexual System ◽  
Freshwater Systems ◽  
Phylogenetic Studies ◽  
Cytogenetic Data ◽  
Sex Chromosome System

The neotropical freshwater systems have a high number of catfish species (Siluriformes), and many of those are denominated "cascudos" in Brazil. Cytogenetic data about three "cascudos" species fished in the rio Araguaia are described in the present study. The Pterygoplichthys joselimaianus showed 2n=52, with 28 metacentrics (M) chromosomes, 16 submetacentrics (SM) and 8 subtelocentrics/acrocentrics (ST/A) in both sexes. Hemiancistrus spinosissimus showed 2n=52, with karyotype formulae 26M+22SM+4ST, in both sexes. Hemiancistrusspilomma also showed 2n=52, but in this species a ZZ/ZW sex chromosome system (25M+21SM+6ST in females and 24M+22SM+6ST in males) was observed. The cells from H. spinosissimus and P. joselimaianus showed one chromosome pair bearing Ag-NORs, while in the H. spilomma three chromosome pairs bearing Ag-NORs were detected. The data showed in this work reveal particular chromosomal characteristics, important for a good recognition of both Hemincistrus species, and also show the importance of the insertion of cytogenetic data on taxonomic phylogenetic studies.

scholarly journals Sex chromosome system ZZ/ZW in Apareiodon hasemani Eigenmann, 1916 (Characiformes, Parodontidae) and a derived chromosomal region

2012 ◽  
Vol 35 (4) ◽  
pp. 770-776 ◽  
Author(s):  
Elisangela Bellafronte ◽  
Michelle Orane Schemberger ◽  
Roberto Ferreira Artoni ◽  
Orlando Moreira Filho ◽  
Marcelo Ricardo Vicari
Keyword(s):  
Chromosomal Region ◽  
Sex Chromosome ◽  
Sex Chromosome System
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