Estimation of heritability of feeding behaviour traits and their correlation with production traits in Finnish Yorkshire pigs     

Alper T. Kavlak  Pekka Uimari 《Zeitschrift für Tierzüchtung und Züchtungsbiologie》2019,136(6):484-494

A major proportion of the costs of pork production is related to feed. The feed conversion rate (FCR) or residual feed intake (RFI) is thus commonly included in breeding programmes. Feeding behaviour traits do not directly have economic value but, if correlated with production traits, can be used as auxiliary traits. The aim of this study was to estimate the heritability of feeding behaviour traits and their genetic correlations with production traits in the Finnish Yorkshire pig population. The data were available from 3,235 pigs. Feeding behaviour was measured as the number of visits per day (NVD), time spent in feeding per day (TPD), daily feed intake (DFI), time spent feeding per visit (TPV), feed intake per visit (FPV) and feed intake rate (FR). The test station phase was divided into five periods. Estimates of heritabilities of feeding behaviour traits varied from 0.17 to 0.47. Strong genetic correlations were obtained between behaviour traits in all periods. However, only DFI was strongly correlated with the production traits. Interestingly, a moderate positive genetic correlation was obtained between FR and backfat thickness (0.1–0.5) and between FR and average daily gain (0.3–0.4), depending on the period. Based on the results, there is no additional benefit from including feeding‐related traits other than those commonly used (FCR and RFI) in the breeding programme. However, if correlated with animal welfare, the feeding behaviour traits could be valuable in the breeding programme.  相似文献   

The colonization preference and population trends of larval fig psylla, <Emphasis Type="Italic">Homotoma ficus</Emphasis> L. (Hemiptera: Homotomidae)     

Nimet Sema Gencer  Kiymet Senan Coskuncu  Nabi Alper Kumral 《Journal of pest science》2007,80(1):1-8

The colonization preference and population trends of larval fig psylla Homotoma ficus L. were studied in Bursa, northwestern Turkey, from March 2000 to July 2001. Homotoma ficus overwintered at the egg stage on terminal buds and lenticels of shoots. Larval emergence occurred on 30th and 11th March in 2000 and 2001, respectively. Degree-day (DD) accumulations since 1st January indicate that the emergence of first larvae averaged 47 DD based on the larval developmental threshold of 10.9°C. Although the population trends of Homotoma ficus larvae were affected by temperature and rainfall, there was only significant relationship between larval abundance and temperature. The first instar larvae significantly preferred the bottom and the inside stipule of leaves. The second instar larvae distributed not only on expanding green tissues but also on both the upper and lower surface of leaves corresponding to the fig bud development period. Third to fifth instars colonized significantly greater on the bottom of leaves compared with the stipule and upper surface. In addition, significant linear relationship was found between fig phenology and cumulative larval counts. The importance of the colonization preference of larval instars and the use of fig phenology as well as DD for timing of insecticide treatments are discussed.  相似文献   

Susceptibility of female populations of <Emphasis Type="Italic">Panonychus ulmi</Emphasis> (Koch) (Acari: Tetranychidae) to some acaricides in apple orchards     

Nabi Alper Kumral  Bahattin Kovanci 《Journal of pest science》2007,80(3):131-137

The levels of susceptibility of adult female European red mite, Panonychus ulmi (Koch) populations collected from apple orchards in Bursa region of Turkey, to acaricides, dicofol, bromopropylate and fenpyroximate belong to two different groups and an acaricide–insecticide, amitraz, were determined by a petri leaf disk-Potter spray tower method. When compared with the susceptible population, resistance ratios, as indicated by LC₅₀ values, ranged from 2.2 to 11.9, 0.8 to 3.6, 1.0 to 22.5 and 0.9 to 7.9, while LC₉₀ values varied from 1.6 to 9.8, 1.0 to 5.4, 1.0 to 47.4, 1.4 to 36.6, respectively, for amitraz, dicofol, bromopropylate and fenpyroximate. An examination of bioassay responses showed that susceptibility was lower for fenpyroximate and bromopropylate than for the other two compounds in the order of amitraz < dicofol. In conclusion, P. ulmi susceptibility to tested compounds varied widely from location to location.  相似文献   

Effects of crossbreeding indigenous Hair Goat with Saanen on carcass measurements and meat quality of kids under an intensive production system     

Alper YILMAZ  Bulent EKIZ  Mustafa OZCAN  Cuneyt KAPTAN  Hulya HANOGLU  Mesut YILDIRIR 《Animal Science Journal》2009,80(4):460-467

The aim of study was to investigate the effect of genotype on carcass measurements and meat quality characteristics of purebred Hair Goat, Saanen × Hair Goat (F₁ and B₁) kids under an intensive production system. In total, 24 kids were slaughtered at the age of approximately 133 days. Kids were fattened for 56 days immediately after weaning. Hot carcass weights were 6.78, 7.61 and 7.02 kg and dressing percentages were 49.71, 49.27 and 48.78%, respectively ( P  > 0.05). Differences between genotypes for carcass measurements and indexes were not significant. Effect of genotype on pH measurements, drip loss, water holding capacity, cooking loss and Warner Bratzler shear force values were not significant. Meat lightness values at 0 h, 1 h and 1 day after cutting were higher in crossbred kids than Hair Goat kids ( P  < 0.05). Redness value was significantly higher in meat samples of Hair goat kids at 0 h, 1 h and 1 day measurements ( P  < 0.05). Kid genotype had no significant effect on meat sensory characteristics, except tenderness. Panelists gave lower scores for meat tenderness to F₁ and B₁ crosses compared to purebred Hair Goat kids. In conclusion, higher meat lightness values of crossbred kids, at particularly B₁ level, might have a positive effect on the consumer choices.  相似文献   

Medium Cut-Off Membrane Can Be a New Treatment Tool in Amanita phalloides Poisoning     

Bülent Huddam  Alper Alp  İsmail Kırlı  Mehmet Yılmaz  Aytuğ Çağırtekin  Hakan Allı  Sultan Edebali 《The Forestry Chronicle》2021,32(2):192-197

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Rising chemical "stars" could play many roles     

J Alper 《Science (New York, N.Y.)》1991,251(5001):1562-1564

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Beta-1C-globulin: metabolism in glomerulonephritis   总被引：9，自引：0，他引：9  

C A Alper  A S Levin  F S Rosen 《Science (New York, N.Y.)》1966,153(732):180-182

The metabolism of beta(1C)-globulin labeled with iodine-131 was studied in six normal individuals and in three individuals with glomerulonephritis who exhibited markedly reduced serum concentrations of this protein. Fractional of serum beta(1C)-globulin in glomerulonephritis appears to be chiefly secondary to decreased synthesis.  相似文献   

Engineering metabolism for commercial gains     

Alper J 《Science (New York, N.Y.)》1999,283(5408):1625-1626

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The effect of GnRH on the pregnancy ratio in low-yielding local race cows: comparison of different injection times     

Uslu  Barış Atalay  Kocyigit  Alper  Sendag  Sait  Gülyüz  Fetih  Wehrend  Axel 《Tropical animal health and production》2020,52(2):497-502

Tropical Animal Health and Production - The objective of this article was to investigate the efficiency of GnRH administrations at different time points after induced luteolysis on pregnancy rates...  相似文献   

Molecular typing and cdt genes prevalence of Campylobacter jejuni isolates from various sources     

Findik A  Ica T  Onuk EE  Percin D  Kevenk TO  Ciftci A 《Tropical animal health and production》2011,43(3):711-719

The genetic diversity of 168 Campylobacter jejuni isolates originating from human (n = 30), cattle (n = 36), sheep (n = 44), dog (n = 35), and poultry (n = 21) and cdt genes prevalence of the isolates were investigated. To determine the genetic diversity of these strains, random amplified polymorphic DNA–polymerase chain reaction (PCR) using a random primer (M13) was performed. The numbers of genotypes determined in human, cattle, sheep, dog, and poultry isolates were 19, 18, 17, 18, and 6, respectively. To find out the prevalence of cdt genes in C. jejuni isolates simultaneously, a multiplex PCR was performed. The prevalence of the separate cdt genes was found to vary from 69% to 100% for cdtA, 92% to 100% for cdtB, and 39% to 98% for cdtC. These rates without host discriminating were 95%, 98%, and 93% for cdtA, cdtB, and cdtC, respectively. The prevalence of all three cdt genes in strains originating from human, cattle, sheep, dog, and poultry were 87%, 67%, 84%, 89%, and 39%, respectively. These results showed the relatively high genetic heterogeneity and variation of cdt genes among C. jejuni isolates from various sources except for poultry isolates. This study gives baseline data on molecular characterization of C. jejuni strains from different sources.  相似文献