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Alvarez-Velazquez MF, Espinosa-Gómez FC, Aristizabal JF, Garber PA, Serio-Silva JC. A simple assay for measuring tannin-protein precipitation capacity offers insights into the diet and food choice of black howler monkeys (Alouatta pigra). Am J Primatol 2024; 86:e23638. [PMID: 38715239 DOI: 10.1002/ajp.23638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/05/2024] [Accepted: 04/27/2024] [Indexed: 06/18/2024]
Abstract
Phenolics, like tannins, are plant-specialized metabolites that play a protective role against herbivory. Tannins can reduce palatability and bind with proteins to reduce digestibility, acting as deterrents to feeding and impacting nutrient extraction by herbivores. Some assays measure tannin and total phenolics content in plants but lack determination of their biological effects, hindering the interpretation of tannin function in herbivory and its impacts on animal behavior and ecology. In this study, we successfully applied the radial diffusion assay to assess tannin protein precipitation (PP) capacity and evaluate the anti-nutritional effects of tannins in food plants (n = 24) consumed by free-ranging black howler monkeys (Alouatta pigra) in Tabasco, Mexico. We found PP rings in five plant species consumed by the monkeys. The mature fruit of Inga edulis was the most consumed food plant, despite having a high tannin PP capacity (56.66 mg tannic acid equivalent/g dry matter). These findings highlight the presence of tannins in the black howler diet and provide insight into the primates' resilience and potential strategies for coping with anti-nutritional aspects of the diet.
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Affiliation(s)
- María Fernanda Alvarez-Velazquez
- Red de Biología y Conservación de Vertebrados, Instituto de Ecología, A. C. (INECOL), Xalapa, Veracruz, México
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Popular Autónoma del Estado de Puebla (UPAEP), Puebla, Puebla, México
| | - Fabiola Carolina Espinosa-Gómez
- Facultad de Medicina Veterinaria y Zootecnia, Universidad Popular Autónoma del Estado de Puebla (UPAEP), Puebla, Puebla, México
| | - John F Aristizabal
- Departamento de Ciencias Químico-Biológicas, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Ciudad Juárez, Chihuahua, México
| | - Paul A Garber
- Department of Anthropology, Program in Ecology, Evolution and Conservation Biology, University of Illinois, Urbana, Illinois, USA
| | - Juan Carlos Serio-Silva
- Red de Biología y Conservación de Vertebrados, Instituto de Ecología, A. C. (INECOL), Xalapa, Veracruz, México
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Adamczyk B. Tannins and Climate Change: Are Tannins Able To Stabilize Carbon in the Soil? JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024. [PMID: 38600619 DOI: 10.1021/acs.jafc.4c00703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The interaction between tannins and proteins has been studied intensively for more than half a century as a result of its significance for various applications. In chemical ecology, tannins are involved in response to environmental stress, including biotic (pathogens and herbivores) and abiotic (e.g., drought) stress, and in carbon (C) and nutrient cycling. This perspective summarizes the newest insights into the role of tannins in soil processes, including the interaction with fungi leading to C stabilization. Recent knowledge presented here may help to optimize land management to increase or preserve soil C to mitigate climate change.
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Affiliation(s)
- Bartosz Adamczyk
- Natural Resources Institute Finland, Latokartanonkaari 9, 00790 Helsinki, Finland
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3
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Dell’Anno M, Frazzini S, Ferri I, Tuberti S, Bonaldo E, Botti B, Grossi S, Sgoifo Rossi CA, Rossi L. Effect of Dietary Supplementation of Chestnut and Quebracho Tannin Supplementation on Neonatal Diarrhoea in Preweaning Calves. Antioxidants (Basel) 2024; 13:237. [PMID: 38397835 PMCID: PMC10885919 DOI: 10.3390/antiox13020237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/09/2024] [Accepted: 02/11/2024] [Indexed: 02/25/2024] Open
Abstract
Neonatal calf diarrhoea (NCD) poses a significant health challenge in cattle herds, resulting in considerable economic losses and antimicrobial use. In response to the escalating threat of antimicrobial resistance, viable alternatives are imperative, aligning with European policies. This study evaluated the in-milk supplementation of the chestnut and quebracho tannin extract in preweaning calves on performance, diarrhoea occurrence, Cryptosporidium spp. shedding, protein digestibility, and intestinal health. Twenty newborn calves were divided, after colostrum administration, into two experimental groups for 30 days as follows: the control (CTRL) was fed with whole milk and solid feed, and tannins (TAN) were fed whole milk supplemented with 6/g day of tannin extract and solid feed. Faecal samples were collected on days 0, 3, 7, 14, and 30 for the evaluation of Cryptosporidium oocyst shedding and protein digestibility. Faecal consistency was evaluated during the sampling using the faecal score scale (0-3 scale, considering diarrhoea > 1). The results showed a significant reduction in diarrhoea frequency in the TAN compared to the CTRL group (p < 0.05) over 30 days of the trial. The prevalence of Cryptosporidium spp. was generally low (12%), considering all analysed samples. Protein digestibility revealed comparable values for the TAN and CTRL groups, suggesting that tannins did not negatively affect milk protein availability. In conclusion, the in-milk supplementation of 6/g day of the chestnut and quebracho tannin extract could be considered a valuable functional feed additive to decrease NCD occurrence, thus supporting animal health and decreasing antibiotic use in livestock.
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Affiliation(s)
- Matteo Dell’Anno
- Department of Veterinary Medicine and Animal Sciences—DIVAS, Università degli Studi di Milano, 26900 Lodi, Italy; (M.D.); (S.F.); (I.F.); (S.T.); (E.B.); (S.G.); (C.A.S.R.)
| | - Sara Frazzini
- Department of Veterinary Medicine and Animal Sciences—DIVAS, Università degli Studi di Milano, 26900 Lodi, Italy; (M.D.); (S.F.); (I.F.); (S.T.); (E.B.); (S.G.); (C.A.S.R.)
| | - Irene Ferri
- Department of Veterinary Medicine and Animal Sciences—DIVAS, Università degli Studi di Milano, 26900 Lodi, Italy; (M.D.); (S.F.); (I.F.); (S.T.); (E.B.); (S.G.); (C.A.S.R.)
| | - Susanna Tuberti
- Department of Veterinary Medicine and Animal Sciences—DIVAS, Università degli Studi di Milano, 26900 Lodi, Italy; (M.D.); (S.F.); (I.F.); (S.T.); (E.B.); (S.G.); (C.A.S.R.)
| | - Elisa Bonaldo
- Department of Veterinary Medicine and Animal Sciences—DIVAS, Università degli Studi di Milano, 26900 Lodi, Italy; (M.D.); (S.F.); (I.F.); (S.T.); (E.B.); (S.G.); (C.A.S.R.)
| | - Benedetta Botti
- Freelance Veterinarian, Via Alessandrini, 4, Bogolese di Sorbolo, 43058 Parma, Italy;
| | - Silvia Grossi
- Department of Veterinary Medicine and Animal Sciences—DIVAS, Università degli Studi di Milano, 26900 Lodi, Italy; (M.D.); (S.F.); (I.F.); (S.T.); (E.B.); (S.G.); (C.A.S.R.)
| | - Carlo Angelo Sgoifo Rossi
- Department of Veterinary Medicine and Animal Sciences—DIVAS, Università degli Studi di Milano, 26900 Lodi, Italy; (M.D.); (S.F.); (I.F.); (S.T.); (E.B.); (S.G.); (C.A.S.R.)
| | - Luciana Rossi
- Department of Veterinary Medicine and Animal Sciences—DIVAS, Università degli Studi di Milano, 26900 Lodi, Italy; (M.D.); (S.F.); (I.F.); (S.T.); (E.B.); (S.G.); (C.A.S.R.)
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Araiza Ponce KA, Gurrola Reyes JN, Martínez Estrada SC, Salas Pacheco JM, Palacios Torres J, Murillo Ortiz M. Fermentation Patterns, Methane Production and Microbial Population under In Vitro Conditions from Two Unconventional Feed Resources Incorporated in Ruminant Diets. Animals (Basel) 2023; 13:2940. [PMID: 37760339 PMCID: PMC10525595 DOI: 10.3390/ani13182940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 08/23/2023] [Accepted: 09/11/2023] [Indexed: 09/29/2023] Open
Abstract
In this study, four experimental treatments were evaluated: (T1) alfalfa hay + concentrate, (50:50%, DM); (T2) alfalfa hay + Leucaena leucocephala + concentrate, (30:20:50%, DM); (T3) alfalfa hay + prickly pear + concentrate, (30:20:50%, DM); and (T4) alfalfa hay + Leucaena leucocephala + prickly pear + concentrate, (30:10:10:50%, DM). NH3-N concentrations in T2 and T4 decreased when replaced with alfalfa hay in 20 and 10%, respectively. Treatments did not affect the concentration of total volatile fatty acids (TVFA) between T3 and T4 (p > 0.05), while the concentrations among T1 and T2 were different (p < 0.05). T2 showed a reduction of 25.5% in the methane production when compared to T1 (p < 0.05). The lowest concentrations of protozoa were observed in T2 and T4, which contained Leucaena leucocephala (T2) and Leucaena leucocephala + prickly pear (T4) (p < 0.05). The highest concentration of total methanogens was recorded in T1 and was different in T2, T3, and T4 (p < 0.05). Leucaena leucocephala, at an inclusion percentage of 20%, decreased the methane when compared to T1, whereas prickly pear increased methane production in relation to T1.
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Affiliation(s)
- Karina A. Araiza Ponce
- Faculty of Veterinary Medicine and Animal Science, Juarez University of the State of Durango, Durango 34126, Mexico; (K.A.A.P.); (J.P.T.)
| | - J. Natividad Gurrola Reyes
- Interdisciplinary Research Center for Integral Regional Development, National Polytechnic Institute, Durango Unit, Durango 34126, Mexico; (J.N.G.R.); (S.C.M.E.)
| | - Sandra C. Martínez Estrada
- Interdisciplinary Research Center for Integral Regional Development, National Polytechnic Institute, Durango Unit, Durango 34126, Mexico; (J.N.G.R.); (S.C.M.E.)
| | - José M. Salas Pacheco
- Scientific Research Institute, Juarez University of the State of Durango, Durango 34126, Mexico;
| | - Javier Palacios Torres
- Faculty of Veterinary Medicine and Animal Science, Juarez University of the State of Durango, Durango 34126, Mexico; (K.A.A.P.); (J.P.T.)
| | - Manuel Murillo Ortiz
- Faculty of Veterinary Medicine and Animal Science, Juarez University of the State of Durango, Durango 34126, Mexico; (K.A.A.P.); (J.P.T.)
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Abid K, Jabri J, Yaich H, Malek A, Rekhis J, Kamoun M. Bioconversion of alperujo into an alternative feed for ruminants by pretreatment with live yeasts and/or exogenous fibrolytic enzymes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:64747-64754. [PMID: 37071367 PMCID: PMC10112312 DOI: 10.1007/s11356-023-27056-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Accepted: 04/12/2023] [Indexed: 05/11/2023]
Abstract
Extraction of olive oil through a two-stage centrifugation process produces a large amount of phytotoxic waste known as alperujo. This research was performed to bioconvert alperujo into enriched ruminant feed by pretreatment with exogenous fibrolytic enzymes (EFE) or/and live yeasts (LY). These additives were used in a completely randomized design with 3 EFE doses (0, 4, and 8 µl/g dry matter) and 3 LY doses (0, 4, and 8 mg/g dry matter) in a 3 × 3 factorial arrangement. Fermented alperujo with both EFE doses converted some of their hemicellulose and cellulose to simple sugars and increased bacterial abundance in the rumen. As a result, it shortens the lag time of rumen fermentation, increases the rate and amount of rumen fermentation, and improves digestibility. This improvement provides additional energy that can be used by ruminants to produce milk and by rumen microbiota to produce short-chain fatty acids. Fermented alperujo with a high dose of LY decreased their antinutritional compounds and reduced their high content of lipid. In the rumen, this waste became rapidly fermentable, and rumen bacteria became more abundance. Fermented alperujo with a high dose of LY + EFE accelerated rumen fermentation and improved rumen digestibility, energy available for milk production, and short-chain fatty acids compared to the use of LY or EFE alone. This synergistic interaction between these two additives increased protozoa abundance in rumen and the ability of rumen microbiota to bioconvert ammonia-nitrogen to microbial protein. Ultimately, fermentation alperujo with EFE + LY is a good strategy with minimum investment for a social sustainable economy and environment.
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Affiliation(s)
- Khalil Abid
- Animal Nutrition Laboratory, National School of Veterinary Medicine Sidi Thabet, University of Manouba, 2020, Manouba, Tunisia.
| | - Jihene Jabri
- Animal Nutrition Laboratory, National School of Veterinary Medicine Sidi Thabet, University of Manouba, 2020, Manouba, Tunisia
| | - Hela Yaich
- Animal Nutrition Laboratory, National School of Veterinary Medicine Sidi Thabet, University of Manouba, 2020, Manouba, Tunisia
| | - Atef Malek
- Animal Nutrition Laboratory, National School of Veterinary Medicine Sidi Thabet, University of Manouba, 2020, Manouba, Tunisia
| | - Jamel Rekhis
- Animal Nutrition Laboratory, National School of Veterinary Medicine Sidi Thabet, University of Manouba, 2020, Manouba, Tunisia
| | - Mohamed Kamoun
- Animal Nutrition Laboratory, National School of Veterinary Medicine Sidi Thabet, University of Manouba, 2020, Manouba, Tunisia
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Vargas-Ortiz L, Andrade-Yucailla V, Barros-Rodríguez M, Lima-Orozco R, Macías-Rodríguez E, Contreras-Barros K, Guishca-Cunuhay C. Influence of Acacia Mearnsii Fodder on Rumen Digestion and Mitigation of Greenhouse Gas Production. Animals (Basel) 2022; 12:2250. [PMID: 36077970 PMCID: PMC9454763 DOI: 10.3390/ani12172250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 08/09/2022] [Accepted: 08/18/2022] [Indexed: 02/07/2023] Open
Abstract
In recent years, the worrying generation of GHG from ruminant production has generated widespread interest in exploring nutritional strategies focused on reducing these gases, presenting the use of bioactive compounds (tannins) as an alternative in the diet. The aim of this research was to determine the effect of the addition of different levels of Acacia mearnsii on ruminal degradation, nutrient digestibility, and mitigation of greenhouse gas production. A completely randomized design with four treatments and six repetitions was used. The treatments were: T1, T2, T3, and T4 diets with, respectively, 0%, 20%, 40%, and 60% A. mearnsii. The rumen degradation kinetic and in vitro digestibility, and the production of gas, CH4, and CO2 were evaluated. In situ rumen degradation and in vitro digestibility of DM and OM showed differences between treatments, with T1 being higher (p < 0.05) in the degradation of the soluble fraction (A), potential degradation (A + B), and effective degradation for the different passage rates in percent hour (0.02, 0.05, and 0.08), compared to the other treatments. Rumen pH did not show differences (p > 0.05) between treatments. The lowest (p < 0.05) gas, CH4, and CO2 production was observed in treatments T1 and T2 with an approximate mean of 354.5 mL gas/0.500 g fermented DM, 36.5 mL CH4/0.500 g fermented DM, and 151.5 mL CO2/0.500 g fermented DM, respectively, compared to treatments T3 and T4. Under the conditions of this study, it was concluded that it is possible to replace traditional forages with up to 20% of A. mearnsii, without observing changes in the production of greenhouse gases with respect to the control treatment (0% of A. mearnsii); however, A. mearnsii is not usable because it significantly decreases rumen degradability of DM and OM, which would considerably affect the production in animals.
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Affiliation(s)
- Luis Vargas-Ortiz
- Departamento de Producción Animal, Instituto Superior Tecnológico Benjamín Araujo, Patate 180403, Ecuador
- Centro de Investigaciones Agropecuarias, Universidad Central “Marta Abreu” de Las Villas, Santa Clara 50100, Cuba
| | - Veronica Andrade-Yucailla
- Centro de Investigaciones Agropecuarias, Facultad de Ciencias Agrarias, Universidad Estatal Península de Santa Elena, La Libertad 240204, Ecuador
| | - Marcos Barros-Rodríguez
- Facultad de Ciencias Agropecuarias, Universidad Técnica de Ambato, Sector el Tambo-La Universidad, vía a Quero, Cevallos 1801334, Ecuador
| | - Raciel Lima-Orozco
- Centro de Investigaciones Agropecuarias, Universidad Central “Marta Abreu” de Las Villas, Santa Clara 50100, Cuba
| | - Edis Macías-Rodríguez
- Facultad de Ciencias Veterinarias, Universidad Técnica de Manabí, Portoviejo 130701, Ecuador
| | - Katherine Contreras-Barros
- Facultad de Ciencias Biológicas, Universidad Central del Ecuador, Campus El Dorado-Itchimbía, Quito 170403, Ecuador
| | - Carlos Guishca-Cunuhay
- Facultad de Ciencias Agropecuarias, Universidad Técnica de Ambato, Sector el Tambo-La Universidad, vía a Quero, Cevallos 1801334, Ecuador
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7
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Yang JC, Guevara-Oquendo VH, Christensen D, Lardner HB, Refat B, Rodríguez Espinosa ME, Yu P. Utilization of exogenous fibrolytic enzymes in fiber fermentation, degradation, and digestions and characteristics of whole legume faba bean and its plant silage. Crit Rev Food Sci Nutr 2022; 63:6114-6125. [PMID: 35152802 DOI: 10.1080/10408398.2022.2028126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This article aims to review recent progress and update on utilization of exogenous fibrolytic enzymes in fiber fermentation, degradation, and digestions and nutritive and anti-nutritional characteristics of whole legume faba bean and its silage. The study focused on strategies to improve the utilization and bioavailability of fiber through pre-treating exogenous fibrolytic enzymes. The review includes features of nutrition and anti-nutritional factors and environment impact, forage fiber fermentation, degradation and digestion, legume bean in various diets, use of exogenous enzyme and factor affecting enzyme action in fiber digestion as well as exogenous enzyme response. This review also provides very recent research on effects of fibrolytic enzyme on rumen degradation characteristics of dry matter and fiber of whole plant faba bean silage and effect of exogenous fibrolytic enzyme derived from trichoderma reesei on lactational performance, feeding behavior, rumen fermentation and nutrient digestibility in dairy cows fed whole plant faba bean silage-based diet. This study provides an insight on nutritive and anti-nutritive characteristics of whole legume bean and its plant silage and utilization of exogenous fibrolytic enzymes in fiber fermentation, degradation, and digestions.
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Affiliation(s)
- Jen-Chieh Yang
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - Victor H Guevara-Oquendo
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - David Christensen
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - Herbert Bart Lardner
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - Basim Refat
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - María E Rodríguez Espinosa
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
| | - Peiqiang Yu
- Department of Animal and Poultry Science, College of Agriculture and Bioresources, University of Saskatchewan, Saskatoon, SK, Canada
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Roldan MB, Cousins G, Muetzel S, Zeller WE, Fraser K, Salminen JP, Blanc A, Kaur R, Richardson K, Maher D, Jahufer Z, Woodfield DR, Caradus JR, Voisey CR. Condensed Tannins in White Clover ( Trifolium repens) Foliar Tissues Expressing the Transcription Factor TaMYB14-1 Bind to Forage Protein and Reduce Ammonia and Methane Emissions in vitro. FRONTIERS IN PLANT SCIENCE 2022; 12:777354. [PMID: 35069633 PMCID: PMC8774771 DOI: 10.3389/fpls.2021.777354] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 11/26/2021] [Indexed: 05/29/2023]
Abstract
Grazing ruminants contribute to global climate change through enteric methane and nitrous oxide emissions. However, animal consumption of the plant polyphenolics, proanthocyanidins, or condensed tannins (CTs) can decrease both methane emissions and urine nitrogen levels, leading to reduced nitrous oxide emissions, and concomitantly increase animal health and production. CTs are largely absent in the foliage of important temperate pasture legumes, such as white clover (Trifolium repens), but found in flowers and seed coats. Attempts at enhancing levels of CT expression in white clover leaves by mutagenesis and breeding have not been successful. However, the transformation of white clover with the TaMYB14-1 transcription factor from Trifolium arvense has resulted in the production of CTs in leaves up to 1.2% of dry matter (DM). In this study, two generations of breeding elevated foliar CTs to >2% of DM. The CTs consisted predominantly of prodelphinidins (PD, 75-93%) and procyanidins (PC, 17-25%) and had a mean degree of polymerization (mDP) of approximately 10 flavan-3-ol subunits. In vitro studies showed that foliar CTs were bound to bovine serum albumin and white clover proteins at pH 6.5 and were released at pH 2.-2.5. Using rumen in vitro assays, white clover leaves containing soluble CTs of 1.6-2.4% of DM significantly reduced methane production by 19% (p ≤0.01) and ammonia production by 60% (p ≤ 0.01) relative to non-transformed wild type (WT) controls after 6 h of incubation. These results provide valuable information for further studies using CT expressing white clover leaves for bloat prevention and reduced greenhouse gas emissions in vivo.
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Affiliation(s)
- Marissa B. Roldan
- Grasslands Research Centre, AgResearch Ltd, Palmerston North, New Zealand
| | - Greig Cousins
- PGG Wrightson Seeds Ltd, Palmerston North, New Zealand
| | - Stefan Muetzel
- Grasslands Research Centre, AgResearch Ltd, Palmerston North, New Zealand
| | - Wayne E. Zeller
- ARS-USDA, US Dairy Forage Research Center, Madison, WI, United States
| | - Karl Fraser
- Grasslands Research Centre, AgResearch Ltd, Palmerston North, New Zealand
- Riddet Institute, Massey University, Palmerston North, New Zealand
| | | | - Alexia Blanc
- PGG Wrightson Seeds Ltd, Palmerston North, New Zealand
- AgroParis Tech, Paris, France
| | - Rupinder Kaur
- PGG Wrightson Seeds Ltd, Palmerston North, New Zealand
| | - Kim Richardson
- Grasslands Research Centre, AgResearch Ltd, Palmerston North, New Zealand
| | - Dorothy Maher
- Grasslands Research Centre, AgResearch Ltd, Palmerston North, New Zealand
| | - Zulfi Jahufer
- Grasslands Research Centre, AgResearch Ltd, Palmerston North, New Zealand
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