2023 Cilt 17 Sayı 49

Permanent URI for this collectionhttps://hdl.handle.net/11452/41011

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    Effect of probiotic supplementation to the diet on performance and egg quality of laying hens
    (Bursa Uludağ Üniversitesi, 2023-07-07) Curabay, Barışcan; Cufadar, Yusuf; Gökmen, Seyit Ahmet
    Probiotics are live microorganisms that provide many health benefits to the host when administered in sufficient amounts. The use of probiotics in poultry diets has steadily increased over the years as an alternative to antibiotics to avoid the use of antibiotics in the feed as a result of increasing demand. The objective of this study, determine the effect of different probiotic types on laying hen performance and egg quality. A total of 140 laying hens, aged 33 weeks of age, were involved in a 56-day long experiment. The study was conducted in 5 treatment groups, each with 7 replications, and were fed with five diets. The diets contained Bacillus megaterium and Bacillus amyloliquefaciens at one colony forming unit (0.5 g/kg with 1x108 cfu/g), in addition to a control diet. Results indicated that initial body weight, final body weight, body weight gain, feed intake, feed conversion ratio, and damaged egg ratio were not significantly different among the groups (p>0.05). The addition of Bacillus megaterium and Bacillus amyloliquefaciens to the laying hen diets had no significant effects on albumen and yolk index, shell breaking strength, shell weight, shell thickness, shell ratio, and egg yolk color characteristics (L* and b* values). However, the a* value and Haugh unit of yolk color characteristics significantly decreased compared to the control group (p<0.05; p<0.01). According to the results, it was concluded that the inclusion of Bacillus megaterium and Bacillus amyloliquefaciens to the diets of laying hens did not result a significant change growth performance and egg quality parameters.
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    Determination of some disease resistance genes of tomato breeding lines which developed from different origine using molecular markers
    (Bursa Uludağ Üniversitesi, 2023-06-22) Şeker, Ayşe; Çardak, Tuğba Zeynep; Yiğit, Merve; Şeker, Emre; Pınar, Hasan; Mutlu, Nedim
    Tomato is one of the important vegetables produced in the world, and China, USA and Turkey are among the important producers in world production. Diseases and pests are one of the most important problems in tomato as in other species. Breeding for disease resistance has been an important objective in tomato improvement. When preparing new breeding programs, genetic materials from different backgrounds are needed. However, the genes for resistance to diseases and pests may vary according to the tomato production regions. In order to obtain the desired resistance in breeding programs, it is important to know which resistance is needed for which region. From this point of view, in this study, it is aimed to determine the distribution of disease and pest resistance of the lines developed from tomato varieties produced in Turkey, USA and Jordan. In the materials selected from Turkey in 2014, disease resistance other than Verticillium was rarely found, while Sw-5 and Ph3 genes were found in 2017 and 2019. On the other hand, it was determined that the majority of genetic materials originating from USA and Jordan had Ve, FF, Mi1-2, Pto, Tm-2, Ty-3, Ph3 and SW5 genes. The findings show that it can be taken into account in developing disease and pest resistant varieties for different production regions.