The SLICK haplotype, originally identified in Senepol cattle, has been introduced into Holsteins. Inheritance of the SLICK1 allele of the prolactin receptor gene improves thermotolerance of lactating Holstein cows under humid heat stress conditions.

Dr. Anna Denicol of the University of California-Davis, along with her research group, recently published a study on whether pre- and postweaning Holstein heifers carrying the SLICK1 allele would show physiological responses indicative of higher tolerance to heat stress in high- and low-humidity climates. In this video, Dr. Phil Cardoso talks with Dr. Denicol about her work.


Links to papers and other sources mentioned in this podcast
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Carmickle et al. 2022, Physiological responses of Holstein calves and heifers carrying the SLICK1 allele to heat stress in California and Florida dairy farms.
https://www.journalofdairyscience.org/article/S0022-0302(22)00527-6/fulltext
DOI: 10.3168/jds.2022-22177

Dikmen et al. 2014, The SLICK hair locus derived from Senepol cattle confers thermotolerance to intensively managed lactating Holstein cows.
https://www.journalofdairyscience.org/article/S0022-0302(14)00457-3/fulltext
DOI: 10.3168/jds.2014-8087

Sosa et al. 2021, Inheritance of the SLICK1 allele of PRLR in cattle.
https://onlinelibrary.wiley.com/doi/10.1111/age.13145
DOI: 10.1111/age.13145

Vapometer to measure the speed of water leaving the skin
https://delfintech.com/products/vapometer/