Transgenerational epigenetic inheritance of GnRH neuronal number?


A presentation by Katherine E Kaugars et al., from the recent SBN  2012 conference indicates that  natural heritable variation in winter reproduction is due to differences in the number of GnRH neurons rather than to differences in activity of GnRH neurons.

This finding is consistent with my model of adaptive evolution via ecological, social, and neurogenic niche construction. In my model,  the number of GnRH neurosecretory neurons in the mammalian brain determines subtle variations in GnRH secretion via a diet-responsive hypothalamic neurogenic niche. Transgenerational epigenetic inheritance helps to ensure that the epigenetic effect of nutrient chemicals is similar in similar species.   But there are species-specific epigenetic effects of pheromones  on the development of the brain and behavior that are responsible for speciation.

On the other hand, I guess random mutations could be responsible for speciation — at least according to some evolutionary theorists who are nevertheless unwilling to answer the question: Is there a model for that?

About James V. Kohl 1308 Articles
James Vaughn Kohl was the first to accurately conceptualize human pheromones, and began presenting his findings to the scientific community in 1992. He continues to present to, and publish for, diverse scientific and lay audiences, while constantly monitoring the scientific presses for new information that is relevant to the development of his initial and ongoing conceptualization of human pheromones. Recently, Kohl integrated scientific evidence that pinpoints the evolved neurophysiological mechanism that links olfactory/pheromonal input to genes in hormone-secreting cells of tissue in a specific area of the brain that is primarily involved in the sensory integration of olfactory and visual input, and in the development of human sexual preferences. His award-winning 2007 article/book chapter on multisensory integration: The Mind’s Eyes: Human pheromones, neuroscience, and male sexual preferences followed an award winning 2001 publication: Human pheromones: integrating neuroendocrinology and ethology, which was coauthored by disinguished researchers from Vienna. Rarely do researchers win awards in multiple disciplines, but Kohl’s 2001 award was for neuroscience, and his 2007 “Reiss Theory” award was for social science. Kohl has worked as a medical laboratory scientist since 1974, and he has devoted more than twenty-five years to researching the relationship between the sense of smell and the development of human sexual preferences. Unlike many researchers who work with non-human subjects, medical laboratory scientists use the latest technology from many scientific disciplines to perform a variety of specialized diagnostic medical testing on people. James V. Kohl is certified with: * American Society for Clinical Pathology * American Medical Technologists James V. Kohl is a member of: * Society for Neuroscience * Society for Behavioral Neuroendocrinology * Association for Chemoreception Sciences * Society for the Scientific Study of Sexuality * International Society for Human Ethology * American Society for Clinical Laboratory Science * Mensa, the international high IQ society