The objective of the study was to compare the carcass characteristics, meat quality, and blood parameters of slow and fast grown female broiler chickens fed in organic or conventional production system. The two genotypes tested were medium slow-growing chickens (SG, Hubbard Red JA) and commercial fast-growing chickens (FG, Ross 308). Both genotypes (each represented by 400 chickens) were divided into two sub-groups fed either organic (O) or conventional (C) systems. Chickens of each genotype and system were raised in a semi environmentally controlled poultry house until 21 d of age and were assigned to 5 pens of 40 chickens each. Then, O system chickens were transferred into an open-side poultry house with an outdoor run. At 81 d of age, 10 female chickens from each genotype and from each production system (n = 40) were randomly chosen to provide material for analysis, and were weighed and brought to the slaughterhouse to assess carcass characteristics and meat quality. The blood parameters were determined by using 5 female chickens from each genotype and from each production system (n = 20). FG had the higher live weight, along with carcass, breast, and thigh-drumstick weights compared to SG (p<0.05). FG had the higher breast yield, whereas SG had the higher thigh-drumstick yield (p<0.05). The O system resulted in a higher amount of abdominal fat (p<0.05). In addition, the O system values were higher for dry matter, crude ash, crude protein, and pH15 values in breast meat, and for crude ash, crude protein, and pH15 values in drumstick meat (p<0.05). In addition, total saturated fatty acids, total mono-unsaturated fatty acids, and total omega 3 were significantly higher in the O system than in the C system. Thus, the O system showed a positive advantage compared to the C system regarding female chicken meat quality, primarily within the ash, protein, and total omega 3 fatty acid profiles. In conclusion, the present study indicated that the main factor affecting the carcass characteristics of female chickens was genotype, whereas the organic system contributed to enhanced meat quality. These findings provide a better understanding of the relative roles of genotype and production systems in female broiler characteristics, and might aid producers in designing their facilities to optimize yield and quality while maintaining acceptable animal welfare standards.

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The present research was undertaken to evaluate of soybean hybrids environmental interaction and adaptability on Mediterranean region conditions. Seven advanced (F7) soybean cross breeding lines (KB-67, KS-39, KS-14, KS-12, KS-11, KS-10, KS-2) selected from the Kunitz x SS-201 and Kunitz x Bert crosses populations based on earliness and yield characteristics in the preliminary trials and three soybean varieties (Bravo, Nova and Arisoy) were tested in the trial in four replications in 2017 and 2018 according to the randomized blocks trial design. The analysis of variance revealed significant variations for all characters. According to research findings the yield of lines and varieties 2017 and 2018 varied from 1008.38-1567.13 kg ha-1 and 1018.94-1367.00 kg ha-1 respectively and KS-39 advanced soybean line had the highest grain yield in terms of two years’ average. The highest plant height (95.55 cm) was obtained from KS 11 and the lowest plant height (78.80 cm) from BRAVO variety. According to the two-year average data, KB-67 (129.62 pods per plant) and KS-39 (114.70 pods per plant) lines were the genotypes with the highest number of pods in the plant. The number of flowering days varied between 32.50 days and 36.75 days according to the two-year averages, and the KS-12 genotype was the earliest flowering genotype. The lines KS-10 (103.38) and KS-12 (103.50) came to the fore as the genotypes with the earliest maturation days. Among the lines tested in the experiment, KS-11 in terms of plant height, KS-14 in terms of first pod height, KS-14 in terms of 100-seed weight, and KS-39 in terms of the number of seeds per pod were the lines that showed the best performance.

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Amaç: Bu çalışmada, etlik piliçlerde çevresel stresin gelişme performansı, karkas randımanı ve bazı fizyolojik parametreler üzerine etkileri incelenmiştir. Materyal ve Metot: Günlük civcivler yüksek sıcaklık, rotasyon, obje kullanımı ve kontrol olmak üzere rastgele 4 deneme grubuna ayrılmıştır. Sıcaklık grubunda civcivler denemenin 21. gününde 3 saat süre ile 38±1 ºC sıcak stresine maruz bırakılmışlardır. Obje grubuna 1-44. günler arasında çevresel zenginleştirme amacıyla bölmelere yerleştirilen renkli objelerle (ayna, pet şişe, top vb.) görsel uyarıda bulunularak stres yaratılmıştır. Rotasyon grubundaki piliçler ise haftada iki kere düzenli olarak bölmeler arası rotasyona tabi tutulmuşlardır. Denemenin 42. gününde de tüm piliçlere 1 saat süre ile 38±1 ºC sıcak stresi uygulanmıştır. Bulgular: Çevresel zenginleştirme uygulaması etlik piliç performansını önemli düzeyde etkilememekle birlikte, 42. gün canlı ağırlığı ve yemden yararlanmayı iyileştirmiştir. Sıcak stresi uygulanan grubun karkas ağırlığı ve karkas randımanı değerlerinin kontrol grubu ile benzerlik gösterdiği saptanmıştır. Akut sıcak stresi sonrasında (21. gün) sıcaklık grubunda trigliserid düzeyinin kontrol grubuna göre önemli düzeyde daha yüksek olduğu görülmüştür. Deneme sonunda (42. gün) ise glukoz ve kolesterol değerleri bakımından deneme grupları arasında önemli farklılıklar oluştuğu belirlenmiştir. Kontrol, obje ve sıcaklık gruplarında kolesterol seviyeleri benzerlik gösterirken, rotasyon grubunda önemli derecede yükseldiği saptanmıştır. Sonuç: Sonuç olarak, erken yaşlardan itibaren zenginleştirilmiş çevrede büyütme strese adaptasyon sağlanması ve refahın iyileştirilmesi amacıyla yararlanılabilecek bir yöntem olarak önerilebilir, ancak uygulamaya aktarılabilmesi için daha fazla çalışma yapılmasına gerek vardır.

In this study, the effects of monochromatic lighting on egg weight loss, embryonic mortality, hatch window and hatching performance were investigated. The number of eggs used in the experiment was a total of 780 (Ross-308 genotype). Eggs were randomly assigned to 3 groups. 1) Control group: Eggs were incubated in dark, 2) Green light group: 560 nm (wavelength from 535 to 585 nm), 3) Red light group: 670 nm (wavelength from 640 to 690 nm). During the first 18 days of the incubation period, continuous illumination of 0.1-0.2 lx intensity was provided with LEDs placed on both sides of the trays. The light transmission was prevented by blank trays coated with greenhouse covering material which has 75% shading feature placed among experiment groups. In this way, light transmission to other trays and any possible hitches of air circulation was prevented. There was no difference between examined egg weights of the treatment groups in the experiment, but it's found that significant difference in egg weight loss for both colours of light. Red light and control groups (15.00% and 11.92%) show a similar embryonic mortality rate, while the green light group has a lower embryonic mortality rate (5.00%) than these groups. The effects of monochromatic lighting on the hatching time were significant (Chi-square<0.05). Although there was no significant difference between hatching performance parameters of the control and red light treatment groups in the experiment, the green light group had better hatching efficiency than the other groups. The findings of this research were carried out with two different light wavelengths are remarkable for showing that the significant effects of the monochromatic illumination on hatching results.