Fig. 5
Impact of thyroid hormone and estradiol on gonadotropin production. Relative pituitary expression of the beta-subunit of luteinizing hormone (LHB), the beta-subunit of follicle stimulating hormone (FSHB), and the glycoprotein hormones alpha-subunit (CGA) after pretreatment with no pretreatment (NPT), thyroid hormone (T3), or estradiol (E2) followed by gonadotropin-releasing hormone (GNRH) treatment in low egg producing hens (LEPH) and high egg producing hens (HEPH). Normalized data are presented relative to LEPH basal expression for each gene. Significant expression differences between LEPH and HEPH for a given condition are denoted with an asterisk (*). Significant differences between GNRH treatments for a given egg production group are denoted with a dagger (†). Significant differences between pretreatments for a given egg production group are denoted with a double dagger (‡)