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Author: search.filters.author.Tuntivisoottikul, K.Subject: search.filters.subject.Thailand

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    Effect of sex, age and final live mass on carcass traits of fattening dairy cattle
    (2020-01-01)
    Moomak, P.
    ;
    Tuntivisoottikul, K.
    Most animals (63.25 %) obtained a marbling score of 2 while 19.27 % obtained a score of 1. Marbling score was not affected by all the studied factors (P>0.05). Sex had a significantly stronger effect on hot and chilled carcass mass (P<0.01): averages for both hot and chilled carcass masses of males were greater than those of females. All studied traits (P<0.05), except chilling loss (P>0.05), were influenced by age. Averages of both hot and chilled carcass mass, both in kg and in proportion of animals with 3 yrs age were higher, but not statistically different from those of 4 yrs animals. Most traits were significantly affected by final live mass (P<0.01). As the final live mass increased, both hot and chilled carcass mass in kg and as a fraction increased, and chilling loss both in kg and as a fraction decreased.
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    Influence of sex, age, slaughter mass and source farm on carcass composition of fattening dairy cattle
    (2020-01-01)
    Phonkhokkong, P.
    ;
    Tuntivisoottikul, K.
    Sex significantly influenced total tendons mass and percentage of tendons mass (P<0.01). The factor had also significantly affected to total mass, total lean meat mass and total bone mass (P<0.05). Age influenced total bone mass, total fat mass, percentage of bone and muscle:fat ratio (P<0.05) and proportion of fat (P<0.01). Chilled carcass mass, total mass of lean meat, bone, fat, and tendons were highly significantly affected by slaughter mass (P<0.01), which also significantly influenced percentage of fat (P<0.05). Cattle with a slaughter mass more than 650 kg had higher averages of chilled carcass mass, total lean meat, bone, fat, and tendon mass and percentage of fat than lighter animals. The factor of source farm significantly effected chilled carcass mass and total fat mass (P<0.01), as well as total mass of lean meat and bone and percentages of bone and of fat (P<0.05).
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    Paternity testing of crossbred beef cattle with 15 microsatellite markers
    (2019-01-01)
    Tuntivisoottikul, K.
    ;
    Chaosap, C.
    Alleles from only 9 microsatellites were detected as BM1818, BM1824, BM2113, CSSM66, ETH10, ETH225, INRA023, INRA037, and INRA063. The highest number of alleles (23 alleles) was found in CSSM66, while the lowest number (13 alleles) was found in ETH 10. BM1818 had expressed an allele size between 239 to 316 bp, while the smallest sizes, 129 to 179 bp, were detected in BM2113. Twenty-nine pairs of sire-offspring obtained a positive LOD score, whereas B-066 with Carlos-sire obtained a negative LOD score. It meant the 29 pairs of sire-offspring were matched with the pedigree records. These 9 microstellites could be used for paternity testing.