Article (Scientific journals)
The walnut tree as a source of progesterone for reproductive control in goats.
Chemineau, P; Lainé, A L; Gennetay, D et al.
2025In Animal, 19 (1), p. 101392
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Keywords :
Male effect; Oestrus; Ovulation; Plants; Small ruminants; Progesterone; Animals; Female; Ovariectomy/veterinary; Reproduction/drug effects; Juglans/chemistry; Goats/physiology; Goats/metabolism; Progesterone/blood; Plant Leaves/chemistry; Goats; Juglans; Ovariectomy; Plant Leaves; Reproduction; Animal Science and Zoology
Abstract :
[en] Intravaginal sponges impregnated with the progesterone (P4) analogue fluorogestone acetate (FGA) induce synchronous oestrous behaviour and normal ovulatory cycle in goats. To explore alternatives using natural P4 from plants, we developed a method of ethanolic extraction and a specific enzyme immunoassay (EIA) to measure P4 in the different parts of the walnut tree Juglans regia. We found a very high concentration of P4, specifically in the leaves of the three most common French varieties (∼100 mg/kg of DM) but not in flowers, fruits, septa, husk, oil or cake. High concentrations of P4-and to a lesser extent its reduction metabolites and phytosterols-were also measured by Gas Chromatography-Mass Spectrometry/Mass Spectrometry in leaf extracts. P4 concentrations were five times higher in October than in June. P4 was detected in 182 varieties of Juglans regia ranging from 35 to 287 mg of P4 per kg of leaf DM. We collected large quantities of leaves over 6 years, which were used to manufacture feed pellets containing 32% of dry leaf for distribution to female goats. To determine their dietary acceptance and their efficacy in terms of P4 blood plasma concentration, three trials in ovariectomised goats and four trials in ovary-intact goats were performed (N = 83). The distribution of 600 g of pellets per day per ovary-intact goat over 3 days, 6 and 4 days before the introduction of males in April allowed us to achieve our objective of a significant increase of P4 plasma concentration to ∼1.5 ng/mL measured by EIA from 24 to 72 h after the first distribution in the walnut pellet group (n = 13). The two control groups of goats (FGA, n = 12 and control, n = 10) showed no increase in plasma P4. However, despite this high P4 plasma concentration, goats of the walnut group had the same percentages of goats in oestrus at the first ovulation and of goats experiencing short ovulatory cycles after introduction of males (54 and 77%, respectively) as the group of control goats (80 and 90%), whereas the FGA goats showed very different percentages (100 and 0%, P < 0.01). It was concluded that whereas walnut leaves contain a high concentration of P4-and its reduction metabolites and phytosterols-the pellet feeding mode does not allow for restoration of oestrus behaviour and duration of the induced cycle consistently achieved with FGA-impregnated intravaginal sponges.
Disciplines :
Agriculture & agronomy
Author, co-author :
Chemineau, P;  Physiologie de la Reproduction et des Comportements, CNRS, INRAE, Université de Tours, 37380 Nouzilly, France. Electronic address: Philippe.Chemineau@inrae.fr
Lainé, A L;  Physiologie de la Reproduction et des Comportements, CNRS, INRAE, Université de Tours, 37380 Nouzilly, France
Gennetay, D;  Physiologie de la Reproduction et des Comportements, CNRS, INRAE, Université de Tours, 37380 Nouzilly, France
Porte, C;  Physiologie de la Reproduction et des Comportements, CNRS, INRAE, Université de Tours, 37380 Nouzilly, France
Chesneau, D;  Physiologie de la Reproduction et des Comportements, CNRS, INRAE, Université de Tours, 37380 Nouzilly, France
Laclie, C;  Physiologie de la Reproduction et des Comportements, CNRS, INRAE, Université de Tours, 37380 Nouzilly, France
Goudet, G;  Physiologie de la Reproduction et des Comportements, CNRS, INRAE, Université de Tours, 37380 Nouzilly, France
Meunier, Maxime  ;  Physiologie de la Reproduction et des Comportements, CNRS, INRAE, Université de Tours, 37380 Nouzilly, France
Delmas, M;  INRAE, UEA, 33210 Toulenne, France
Greil, M L;  INRAE, UEA, 33210 Toulenne, France
Liere, P;  U1195 INSERM Université Paris Saclay, Kremlin Bicêtre, France
Pianos, A;  U1195 INSERM Université Paris Saclay, Kremlin Bicêtre, France
Bernard, A;  INRAE, Université de Bordeaux, UMR BFP, 33882 Villenave d'Ornon, France
Dirlewanger, E;  INRAE, Université de Bordeaux, UMR BFP, 33882 Villenave d'Ornon, France
Delgadillo, J A;  Centro de Investigación en Reproducción Caprina (CIRCA), Universidad Autónoma Agraria Antonio Narro, 27054 Torreón, Coahuila, Mexico
Keller, M;  Physiologie de la Reproduction et des Comportements, CNRS, INRAE, Université de Tours, 37380 Nouzilly, France
More authors (6 more) Less
Language :
English
Title :
The walnut tree as a source of progesterone for reproductive control in goats.
Publication date :
January 2025
Journal title :
Animal
ISSN :
1751-7311
eISSN :
1751-732X
Publisher :
Elsevier, England
Volume :
19
Issue :
1
Pages :
101392
Peer reviewed :
Peer Reviewed verified by ORBi
Funding text :
We thank Drs Hoa Nguyen, H. Cuong, Pham Kim Dang and Samira Sarter for collecting and sending \u2018benalu duku\u2019 leaves from Vietnam, which provided the results presented in Supplementary Material S1. We thank Olivier Lasserre and colleagues of the experimental unit (UEPAO) in Nouzilly for taking care of the animals during the study. We also thank Morgane Brachet, Timoth\u00E9e Zidat, H\u00E9l\u00E8ne Vacher and Adrien Acquistapace of UMR-PRC for their help during animal sampling and observation. We are grateful to Pascal Laurent, Daniel Vergneau, Jean-Yves Chevrollier and all technicians of the Unit\u00E9 Exp\u00E9rimentale Arboricole for their help during the collections of the walnut leaves and all technicians of the Unit\u00E9 Exp\u00E9rimentale Physiologie et Ph\u00E9notypage des Porcs in St. Gilles for their help in processing the experimental pellets. The authors are also grateful to the whole hormonal assay platform in Nouzilly, France for undertaking the hormonal determinations. We thank Pierre Martin from CAPGENES for his enduring support of the programme. This work was supported by the Centre Val de Loire regional authority under CAPRINOIX Contract Numbers 85-C4646 and 2020-00138613, by the programme cadre CNE \u201CMa\u00EEtrise de la reproduction des petits ruminants\u201D Number C18042/32001390 and by INRAE-PHASE specific funding. Phytosterol assays were supported by the INRAE grant Vegetruies of the METABIO programme Number C12603.This work was supported by the Centre Val de Loire regional authority under CAPRINOIX Contract Numbers 85-C4646 and 2020-00138613, by the programme cadre CNE \u201CMa\u00EEtrise de la reproduction des petits ruminants\u201D Number C18042/32001390 and by INRAE-PHASE specific funding. Phytosterol assays were supported by the INRAE grant Vegetruies of the METABIO programme Number C12603.
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