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Breed Discrimination Using DNA Markers Derived from AFLP in Japanese Beef Cattle
Sasazaki, S.,Imada, T.,Mutoh, H.,Yoshizawa, K.,Mannen, H. Asian Australasian Association of Animal Productio 2006 Animal Bioscience Vol.19 No.8
In the meat industry, correct breed information in food labeling is required to assure meat quality. Genetic markers provide corroborating evidence to identify breed. This paper describes the development of DNA markers to discriminate between Japanese Black and F1 (Japanese Black${\times}$Holstein) breeds. The amplified fragment length polymorphism method was employed to detect candidate markers absent in Japanese Black but present in Holstein. The 1,754 primer combinations yielded eleven markers that were converted into single nucleotide polymorphism markers for high-throughput genotyping. The allele frequencies in both breeds were investigated for discrimination ability using PCR-RFLP. The probability of identifying F1 was 0.9168 and probability of misjudgment was 0.0066 using four selected markers. The markers could be useful for discriminating between Japanese Black and F1 and would contribute to the prevention of falsified breed labeling of meat.
Spin and Charge Order in Single-Layered Provskite Cobaltates
H. Yoshizawa,N. Sakiyama,Y. Mitsui,I. A. Zaliznyak,S.-H. Lee 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.2
Recent neutron scattering studies on charge and spin ordering in Pr2-xCaxCoO4 (0.39 ≤ x ≤ 0.73) and La2-xSrxCoO4 (x = 0.61) are reviewed. We found that the propagation vectors of the charge and spin order for both systems are (2δ,0,1) and (δ,0,1), respectively, in the orthorhombic notation with lattice constants a = 5.392 Å and c = 12.196 Å. δ is linearly proportional to 1-x, but it is 0.5 for 0:39 ≤ x ≤ 0:5. This indicates that while the checkerboard charge ordered state previously observed in La2-xSrxCoO4(x = 0.5) is also realized in Pr2-xCaxCoO4 with 0:39 ≤ x ≤ 0:5 and La2-xSrxCoO4 (x = 0.61), the charge ordered state for x > 0.5 is different from the checkerboard order. Instead, our results suggest that for x > 0.5, a charge-density-wave-like modulation of Co2+ and Co3+ ions occurs in the Co-O plane and that ferromagnetic stripes formed at the Co2+ sites along the b-axis are antiferromagnetically arranged along the a-axis.
Isolation and Linkage Mapping of Coding Sequences from Chicken Cosmids by Exon Trapping
Mannen, H.,Dote, Y.,Uratsuji, H.,Yoshizawa, K.,Okamoto, S.,Tsuji, S. Asian Australasian Association of Animal Productio 2004 Animal Bioscience Vol.17 No.3
We performed exon trapping in order to locate functional genes on chicken chromosomes (GGA) and to identify functional gene sequences from chicken cosmids. Sequence analysis of 100 clones revealed 17 putative exons, five of which were identified with known sequences in a gene database search: thymopoietin beta (TMPO), U5 snRNP-specific 40 kDa protein (HPRP8BP), dihydropyridine receptor alpha 1 subunit (CACNL1A3), cystein string protein (CPS) and C15orf4. We attempted to map the genes to chicken chromosomes by using FISH and linkage analysis. The chromosomal localizations were GGA1 (TMPO), GGA10 (C15orf4), GGA23 (HPRP8BP) and GGA28 (CPS) by FISH and linkage analysis, while that of CACNL1A3 was predicted to be on a microchromosome by FISH but not by linkage analysis. Comparative mapping analyses between chickens and humans for the genes revealed both known and new synteny. The syntenic conservation between GGA1 and human chromosome (HSA) 12q23 (TMPO) and between GGA10 and HSA15q25 (C15orf4), were consistent with a recent publication, while two new syntenies were observed between GGA28 and HSA20q13.3 in CPS and between GGA23 and HSA1p34-35 in HPRP8BP. The information of presently mapped genes can contribute as anchor markers based on functional genes and the construction of a comparative map.