Male germ line polysomy in the grasshopper Chorthippus binotatus: extra chromosomes are not transmitted

Genome ◽  
1990 ◽  
Vol 33 (3) ◽  
pp. 384-388 ◽  
Author(s):  
M. Talavera ◽  
M. D. López-Leon ◽  
J. Cabrero ◽  
J. P. M. Camacho
Keyword(s):  
Natural Population ◽  
Sierra Nevada ◽  
Germ Line ◽  
Male Parent ◽  
Male Germ Line ◽  
Controlled Crosses

Some males of the grasshopper Chorthippus binotatus from a natural population in Sierra Nevada (Granada, Spain) were found to be polysomic mosaics for the presence of extra chromosomes (E) in a high proportion of testicular follicles. Transmission analysis of these chromosomes was performed in 21 controlled crosses, 2 of which involved a polysomic parent. While most spermatozoa produced by polysomic males carried E chromosomes, these chromosomes were not transmitted to the progeny, since all 22 embryos descended from a polysomic male parent lacked them.Key words: transmission, polysomy, grasshopper, Chorthippus binotatus.

Effect of Silver Nanoparticles on SRC Activity in Male Germ-line Stem Cells

2006 ◽  
Author(s):  
Laura K. Braydich-Stolle ◽  
Saber Hussain ◽  
John J. Schlager ◽  
Marie-Claude Hofmann
Keyword(s):  
Stem Cells ◽  
Silver Nanoparticles ◽  
Germ Line ◽  
Male Germ Line

RADHA - a new male germ line-specific chromosomal protein of Drosophila

Chromosoma ◽  
1999 ◽  
Vol 108 (4) ◽  
pp. 235-242 ◽  
Author(s):  
Harry R. Harhangi ◽  
Xiaoping Sun ◽  
Ya Xian Wang ◽  
Anna Akhmanova ◽  
Koos Miedema ◽  
...  
Keyword(s):  
Germ Line ◽  
Chromosomal Protein ◽  
Male Germ Line

Differentiating the Male Germ Line

Science ◽  
2005 ◽  
Vol 310 (5749) ◽  
pp. 741.13-741
Keyword(s):  
Germ Line ◽  
Male Germ Line

scholarly journals Plant male germ line transformation

1997 ◽  
Vol 12 (4) ◽  
pp. 949-956 ◽  
Author(s):  
A. Touraev ◽  
E. Stoger ◽  
V. Voronin ◽  
E. Heberle-Bors
Keyword(s):  
Germ Line ◽  
Male Germ Line ◽  
Germ Line Transformation

scholarly journals Identification and sequence analysis of a new member of the mouse HSP70 gene family and characterization of its unique cellular and developmental pattern of expression in the male germ line.

1988 ◽  
Vol 8 (7) ◽  
pp. 2925-2932 ◽  
Author(s):  
Z F Zakeri ◽  
D J Wolgemuth ◽  
C R Hunt
Keyword(s):  
Heat Shock ◽  
Gene Family ◽  
Developmental Stages ◽  
Germ Line ◽  
Cell Lineage ◽  
Hsp70 Gene ◽  
Coding Region ◽  
Male Germ Line ◽  
Sequence Organization

A unique member of the mouse HSP70 gene family has been isolated and characterized with respect to its DNA sequence organization and expression. The gene contains extensive similarity to a heat shock-inducible HSP70 gene within the coding region but diverges in both 3' and 5' nontranslated regions. The gene does not yield transcripts in response to heat shock in mouse L cells. Rather, the gene appears to be activated uniquely in the male germ line. Analysis of RNA from different developmental stages and from enriched populations of spermatogenic cells revealed that this gene is expressed during the prophase stage of meiosis. A transcript different in size from the major heat-inducible mouse transcripts is most abundant in meiotic prophase spermatocytes and decreases in abundance in postmeiotic stages of spermatogenesis. This pattern of expression is distinct from that observed for another member of this gene family, which was previously shown to be expressed abundantly in postmeiotic germ cells. These observations suggest that specific HSP70 gene family members play distinct roles in the differentiation of the germ cell lineage in mammals.

Developmental expression of c-kit, a proto-oncogene encoded by the W locus

Development ◽  
1990 ◽  
Vol 109 (4) ◽  
pp. 911-923 ◽  
Author(s):  
A. Orr-Urtreger ◽  
A. Avivi ◽  
Y. Zimmer ◽  
D. Givol ◽  
Y. Yarden ◽  
...  
Keyword(s):  
Germ Cells ◽  
Receptor Tyrosine Kinase ◽  
Germ Line ◽  
Primordial Germ Cells ◽  
Mouse Embryos ◽  
Developmental Expression ◽  
Male Germ Line ◽  
Polypeptide Growth Factors ◽  
Adult Ovary

Developmental expression of the c-kit proto-oncogene, a receptor tyrosine kinase encoded by the W locus, was investigated by in situ hybridization in normal mouse embryos. Early after implantation transcripts were detectable only in the maternal placenta (6 1/2-7 1/2 days p.c.). Subsequently (8 1/2 days p.c.) numerous ectodermal (neural tube, sensory placodes) and endodermal (embryonic gut) derivatives expressed c-kit. Later transcripts were detected also in the blood islands of the yolk sac and in the embryonic liver, the main sites of embryonic hemopoiesis. Around midgestation, transcripts accumulated in the branchial pouches and also in primordial germ cells of the genital ridges. This complex pattern of expression remained characteristic also later in gestation, when c-kit was expressed in highly differentiated structures of the craniofacial area, in presumptive melanoblasts and in the CNS. In the adult ovary, maternal c-kit transcripts were detected. They were present in the oocytes of both immature and mature ovarian follicles, but not in the male germ line, where c-kit expression may be down regulated. Thus, c-kit activity is complex and appears in multiple tissues including those that also display defects in mutations at the W locus where c-kit is encoded. Correlation between W phenotypes and c-kit expression, as well as the regulation of the complex and multiple expression of polypeptide growth factors and receptors, is discussed.

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