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Articles 1 - 6 of 6
Full-Text Articles in Life Sciences
The Embryonic Mir-35 Family Of Micrornas Promotes Multiple Aspects Of Fecundity In Caenorhabditis Elegans, Katherine Mcjunkin, Victor R. Ambros
The Embryonic Mir-35 Family Of Micrornas Promotes Multiple Aspects Of Fecundity In Caenorhabditis Elegans, Katherine Mcjunkin, Victor R. Ambros
Victor R. Ambros
MicroRNAs guide many aspects of development in all metazoan species. Frequently, microRNAs are expressed during a specific developmental stage to perform a temporally defined function. The C. elegans mir-35-42 microRNAs are expressed abundantly in oocytes and early embryos and are essential for embryonic development. Here, we show that these embryonic microRNAs surprisingly also function to control the number of progeny produced by adult hermaphrodites. Using a temperature-sensitive mir-35-42 family mutant (a deletion of the mir-35-41 cluster), we demonstrate three distinct defects in hermaphrodite fecundity. At permissive temperatures, a mild sperm defect partially reduces hermaphrodite fecundity. At restrictive temperatures, somatic gonad …
Investigating The Role Of The Extracellular Matrix Protein, Spondin 1, In Ovarian Folliculogenesis, Caitlin O'Flynn
Investigating The Role Of The Extracellular Matrix Protein, Spondin 1, In Ovarian Folliculogenesis, Caitlin O'Flynn
Electronic Thesis and Dissertation Repository
Folliculogenesis is the ovarian process in which a follicle, consisting of an oocyte surrounded by granulosa cells (GCs), theca cells, a fluid-filled antrum, and a basal lamina separating GCs from TCs, grows and differentiates, culminating in development of a fertilizable oocyte. TCs under the influence of luteinizing hormone (LH) produce androgens. GCs under the influence of follicle stimulating (FSH) hormone proliferate, produce steroid hormones, and differentiate to become responsive to the surge of LH that initiates ovulation. The cellular processes of folliculogenesis require cell-extracellular matrix (ECM) interactions. Spondin 1 (SPON1) is an ECM protein primarily studied for its role in …
Evaluation Of Reduced Subsets Of Single Nucleotide Polymorphisms For The Prediction Of Age At Puberty In Sows, Katherine L. Lucot, Matthew L. Spangler, Melanie D. Trenhaile, Stephen D. Kachman, Daniel C. Ciobanu
Evaluation Of Reduced Subsets Of Single Nucleotide Polymorphisms For The Prediction Of Age At Puberty In Sows, Katherine L. Lucot, Matthew L. Spangler, Melanie D. Trenhaile, Stephen D. Kachman, Daniel C. Ciobanu
Department of Animal Science: Faculty Publications
Genomic information could be used efficiently to improve traits that are expensive to measure, sex limited or expressed late in life. This study analyzed the phenotypic variation explained by major SNPs and windows for age at puberty in gilts, an indicator of reproductive longevity. A genome-wide association study using 56,424 SNPs explained 25.2% of the phenotypic variation in age at puberty in a training set (n = 820). All SNPs from the top 10% of 1-Mb windows explained 33.5% of the phenotypic variance compared to 47.1% explained by the most informative markers (n = 261). In an evaluation population, consisting …
The Relationship Of Female Physical Attractiveness To Body Fatness, Guanlin Wang, Kurosh Djafarian, Chima A. Egedigwe, Asmaa El Hamdouchi, Robert Ojiambo, Harris Ramuth, Sandra Johanna Wallner-Liebmann, Sonja Lackner, Adama Diouf, Justina Sauciuvenaite, Catherine Hambly, Lobke M. Vaanholt, Mark D. Faries, John R. Speakman
The Relationship Of Female Physical Attractiveness To Body Fatness, Guanlin Wang, Kurosh Djafarian, Chima A. Egedigwe, Asmaa El Hamdouchi, Robert Ojiambo, Harris Ramuth, Sandra Johanna Wallner-Liebmann, Sonja Lackner, Adama Diouf, Justina Sauciuvenaite, Catherine Hambly, Lobke M. Vaanholt, Mark D. Faries, John R. Speakman
Faculty Publications
Aspects of the female body may be attractive because they signal evolutionary fitness. Greater body fatness might reflect greater potential to survive famines, but individuals carrying larger fat stores may have poor health and lower fertility in non-famine conditions. A mathematical statistical model using epidemiological data linking fatness to fitness traits, predicted a peaked relationship between fatness and attractiveness (maximum at body mass index (BMI) = 22.8 to 24.8 depending on ethnicity and assumptions). Participants from three Caucasian populations (Austria, Lithuania and the UK), three Asian populations (China, Iran and Mauritius) and four African populations (Kenya, Morocco, Nigeria and Senegal) …
Wheat Stubble Height On Subsequent Corn And Grain Sorghum Crops, A. Schlegel
Wheat Stubble Height On Subsequent Corn And Grain Sorghum Crops, A. Schlegel
Kansas Agricultural Experiment Station Research Reports
A field study initiated in 2006 was designed to evaluate the effects of three wheat stubble heights on subsequent grain yields of corn and grain sorghum. Corn yields in 2014 were similar to the long-term average, while sorghum yields were greater than the long-term average. Taller cut stubble in 2014 increased biomass production of corn and yield for grain sorghum. When averaged across 2007 through 2014, corn grain yields were 9 bu/a greater when planted into either tall or strip-cut stubble than into low-cut stubble. Average grain sorghum yields were not significantly affected by wheat stubble height. Water use efficiency …
Sow Fertility After Insemination With Varying Doses Of Volume And Spermatozoa Count, Jelena Apic, Slobodanka Vakanjac, Ivan Stancic, Ivan Radovic, Stoja Jotanovic, Zdenko Kanacki, Branislav Stankovic
Sow Fertility After Insemination With Varying Doses Of Volume And Spermatozoa Count, Jelena Apic, Slobodanka Vakanjac, Ivan Stancic, Ivan Radovic, Stoja Jotanovic, Zdenko Kanacki, Branislav Stankovic
Turkish Journal of Veterinary & Animal Sciences
The aim of the present study was to investigate the possibility of increasing boar's reproductive exploitation by using AI doses of doubly reduced volume and sperm count in the intrauterine AI procedure. The experiment was conducted at a commercial pig farm in Serbia in 2014. Classic intracervical insemination (ICI) was performed by using 50 mL or 100 mL volume doses containing 4 × 109 or 2 × 109 progressively motile spermatozoa. The same volumes and sperm numbers per dose were used with intrauterine insemination (IUI). Each dose combination was used to inseminate 30 sows. Intrauterine insemination with AI doses of …