Cyberlindnera jadinii yeast as a protein source for broiler chickens: effects on growth performance and digestive function from hatching to 30 days of age

Abstract

Europe is heavily dependent on imported feed protein sources such as soybean meal ( SBM ); thus, investigating local sustainable alternatives is crucial to increase self-sufficiency. This study evaluated the effects of the inactivated yeast Cyberlindnera jadinii grown on local lignocellulosic sugars on the growth performance and digestive function of Ross 308 broiler chickens. A total of 1,000 male chicks were allocated to 20 pens. There were 5 replicate pens with 50 birds each, from 1 to 30 D after hatch. The birds were offered one conventional wheat–oat–SBM–based control diet and 3 diets with increasing levels of C. jadinii replacing 10, 20, and 30% of dietary crude protein ( CP ), whereas SBM levels were gradually decreased. The feed intake and weight gain of the birds decreased linearly, and feed conversion ratio increased linearly ( P < 0.01) with increasing dietary levels of C. jadinii . Nevertheless, growth performance and feed intake were similar between the birds fed with control diets and diets containing 10% CP from C. jadinii in the starter and grower periods. The apparent ileal digestibility ( AID ) of dry matter, crude fat, organic matter, and carbohydrates was higher in control diets than in diets with 30% C. jadinii CP ( P < 0.05) and decreased ( P < 0.01) with incremental levels of dietary C. jadinii. Regardless, the AID of CP, starch, ash, and phosphorus was unaffected. Ileal villus height on day 10 was maintained in birds fed with diets containing 30% C. jadinii CP compared with the birds fed with control diets but was lower for birds fed with diets containing 10 and 20% C. jadinii protein ( P < 0.05). To conclude, up to 10% C. jadinii CP can replace SBM CP in broiler chicken diets, maintaining growth performance and digestive function, whereas higher levels of C. jadinii may decrease bird performance. Altogether, this suggests the potential of C. jadinii as a local-based protein source in broiler chicken diets, contributing to a more sustainable feed.

Nutritional and functional values of lysed Corynebacterium glutamicum cell mass for intestinal health and growth of nursery pigs

“…The SCP, including yeast, microalgae, and bacterial cells, contains high levels amino acids (AA), fats, and vitamins ( Kihlberg, 1972 ; Michalak et al, 2015 ; Lopes et al, 2017 ). However, intact SCP supplemented in animal diets may cause reduced growth performance, intestinal health, and nutrient digestibility due to indigestible cell wall ( Rumsey et al, 1991 ; Zhang et al, 2013 ; Cruz et al, 2020 ) and the potential endogenous toxins ( Farstad, 1977 ) reducing nutrient digestibility and causing intestinal challenges to young pigs ( Kim et al, 2019 ). The utilization of chemical, enzymatic, and physical processes to lyse bacterial cell wall can release digestible and functional contents from the cell ( Namioka et al, 1991 ; Ugalde and Castrillo, 2002 ; Becker and Richmond, 2004 ).…”

Screening For Yeast Phytase Leads to the Identification of a New Cell-Bound and Secreted Activity in Cyberlindnera jadinii CJ2

“…Furthermore, Cruz and colleagues demonstrated that biomass of C. jadinii can partially replace feed protein content (generally consistent in soybean meal, fish meal, rapeseed meal) in swine and poultry formulation ( Cruz et al, 2020a , b ). The possibility to have active enzymes in feed could be very appealing in order to decrease their phytate content.…”

Torula yeast in the diet of Atlantic salmon Salmo salar and the impact on growth performance and gut microbiome

“…Torula yeast ( Cyberlindnera jadinii, anamorph name Candida utilis ) has long been considered for animal feed, historically as a functional feed additive, and more recently as a protein source 5 , 6 . Existing research has investigated the potential to include torula yeast in diets of poultry 7 , pigs 8 – 10 , and a wide range of aquaculture species including, Pacific white shrimp ( Litopenaeus vannamei ) 11 , Nile tilapia ( Oreochromis niloticus ) 12 and Atlantic salmon 13 , 14 . As a protein source, torula yeast has a high potential value since it can be cultivated independent of location and climate and does not add to pressure on existing agricultural systems 5 .…”