Temporal frequency stability and absence of effects on mating behaviour for an autosomal supernumerary segment in two natural populations of the grasshopper Eyprepocnemis plorans

Genome ◽  
1995 ◽  
Vol 38 (2) ◽  
pp. 320-324 ◽  
Author(s):  
M. D. López-León ◽  
A. Martín-Alganza ◽  
M. C. Pardo ◽  
J. Cabrero ◽  
J. P. M. Camacho
Keyword(s):  
Repetitive Dna ◽  
Mating Success ◽  
Mating Behaviour ◽  
Temporal Frequency ◽  
Natural Populations ◽  
Frequency Stability ◽  
B Chromosomes ◽  
Mating Pattern ◽  
Eyprepocnemis Plorans ◽  
Extra Segment

Interannual evolution of a polymorphism for a supernumerary segment in the smallest autosome of the grasshopper Eyprepocnemis plorans has been analysed in two natural populations. The polymorphism seemed to be stable in both populations, despite its undertransmission through heterozygous females carrying B chromosomes. Analyses of the effects of the extra segment on mating behaviour failed to show differential mating success in any sex or consistent effects on mating pattern. These results are discussed in relation to the maintenance of this polymorphism in natural populations.Key words: supernumerary segments, heterochromatin, repetitive DNA.

Undertransmission of a supernumerary chromosome segment through heterozygous females possessing B chromosomes in the grasshopper Eyprepocnemis plorans

Genome ◽  
1994 ◽  
Vol 37 (4) ◽  
pp. 705-709 ◽  
Author(s):  
M. D. López-León ◽  
M. C. Pardo ◽  
J. Cabrero ◽  
J. P. M. Camacho
Keyword(s):  
Extra Chromosome ◽  
Natural Populations ◽  
Supernumerary Chromosome ◽  
B Chromosomes ◽  
Chromosome Segment ◽  
Transmission Ratio ◽  
Eyprepocnemis Plorans ◽  
Mendelian Transmission

The transmission ratio (ks) for a supernumerary chromosome segment was studied in a total of 54 heterozygous females collected from two Spanish natural populations of the grasshopper Eyprepocnemis plorans. Our analysis clearly demonstrated that ks is negatively dependent on the number of B chromosomes in the female. The possible mechanisms by which B chromosomes may cause undertransmission of the supernumerary segment, and the implications of this phenomenon for the maintenance of this extra chromosome segment, are discussed.Key words: supernumerary segments, B chromosomes, Mendelian transmission, grasshoppers.

The effect of B chromosomes on mating success of the grasshopper Eyprepocnemis plorans

Genetica ◽  
1996 ◽  
Vol 97 (2) ◽  
pp. 197-203 ◽  
Author(s):  
Silvia Mart�n ◽  
Pilar Arana ◽  
Nuno Henriques-Gil
Keyword(s):  
Mating Success ◽  
B Chromosomes ◽  
Eyprepocnemis Plorans

Steep Variation in Mitochondrial DNA and B Chromosomes among Natural Populations of Eyprepocnemis Plorans (Acrididae)

Hereditas ◽  
2004 ◽  
Vol 134 (2) ◽  
pp. 135-140 ◽  
Author(s):  
Marina Clemente ◽  
Carmen Garma ◽  
Blanca García Sola ◽  
Nuno Henriques-Gil
Keyword(s):  
Mitochondrial Dna ◽  
Natural Populations ◽  
B Chromosomes ◽  
Eyprepocnemis Plorans

scholarly journals Mating behaviour of the orange mud crab, Scylla olivacea: The effect of sex ratio and stocking density on mating success

2015 ◽  
Vol 2 ◽  
pp. 50-57 ◽  
Author(s):  
Khor Waiho ◽  
Muhamad Mustaqim ◽  
Hanafiah Fazhan ◽  
Wan Ibrahim Wan Norfaizza ◽  
Fadhlul Hazmi Megat ◽  
...  
Keyword(s):  
Sex Ratio ◽  
Mating Success ◽  
Mating Behaviour ◽  
Stocking Density ◽  
Mud Crab

Microdissection and Chromosome Painting of X and B Chromosomes in the Grasshopper Eyprepocnemis plorans

2009 ◽  
Vol 125 (4) ◽  
pp. 286-291 ◽  
Author(s):  
M. Teruel ◽  
J. Cabrero ◽  
F. Perfectti ◽  
M.J. Acosta ◽  
A. Sánchez ◽  
...  
Keyword(s):  
Chromosome Painting ◽  
B Chromosomes ◽  
Eyprepocnemis Plorans

scholarly journals Preferential Occupancy of R2 Retroelements on the B Chromosomes of the Grasshopper Eyprepocnemis plorans

PLoS ONE ◽  
2014 ◽  
Vol 9 (3) ◽  
pp. e91820 ◽  
Author(s):  
Eugenia E. Montiel ◽  
Josefa Cabrero ◽  
Mercedes Ruiz-Estévez ◽  
William D. Burke ◽  
Thomas H. Eickbush ◽  
...  
Keyword(s):  
B Chromosomes ◽  
Eyprepocnemis Plorans

Meiotic stability of B chromosomes and production of macrospermatids in Aiolopus strepens (Orthoptera: Acrididae)

Genome ◽  
1987 ◽  
Vol 29 (1) ◽  
pp. 5-10 ◽  
Author(s):  
J. A. Suja ◽  
C. Garcia de la Vega ◽  
J. S. Rufas
Keyword(s):  
Key Words ◽  
Natural Populations ◽  
B Chromosomes ◽  
Supernumerary Chromosomes ◽  
Mitotic Instability ◽  
Meiotic Stability ◽  
Intercellular Connections

Four males from several Spanish natural populations of Aiolopus strepens were found to carry B chromosomes. These are short and acrocentric and are identical in the different individuals. They show mitotic instability and meiotic stability. When present in odd numbers one unpaired B is generally observed, while in even numbers they usually form bivalents. In no case were lagging B's observed. B chromosomes do not affect nucleolar expression. A significant increase in the number of macrospermatids is found in individuals with B's. This is more pronounced in follicles containing odd numbers of supernumerary chromosomes. A possible explanation based on an assumed influence of B univalents on the maintenance of intercellular connections is discussed. Key words: B chromosomes, spermiogenesis, insect cytogenetics.

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