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1.
Atsushi NAKAMURA Kenji TOGASHI Naoyuki YAMAMOTO Akiko NISHIURA 《Animal Science Journal》2002,73(3):175-184
In order to control rates of response and inbreeding, mate selection using fuzzy selective mating criteria (FMC) was investigated in adult multiple ovulation and embryo transfer nucleus schemes for dairy cattle. Stochastic simulation was used to model the closed nucleus scheme. This mate selection was examined in four alternative mating and male selection schemes: (i) a hierarchical scheme; (ii) a hierarchical sibship scheme (two males per sibship); (iii) a factorial scheme (two sires per dam); and (iv) a factorial sibship scheme (two males per sibship and two sires per dam). Genetic response and inbreeding rate tended to be reduced by increasing the trade-off parameter of FMC between the expected breeding value and inbreeding of progeny. Inbreeding rates in all schemes were reduced by reducing the variance of family size through selection and the average coancestry of mating pairs through mate allocation. 相似文献
2.
Shohei MATSUURA Shigeru HOSHINO Hideaki HAYASHI Tetsuyuki KOHGUCHI Kyoji HAGIWARA Toshihiro OMURA 《Journal of General Plant Pathology》2002,68(1):99-102
DAS-ELISA proved to be reliable enough to detect a latent infection by Tomato spotted wilt virus (TSWV) in asymptomatic stock plants of chrysanthemum. A high density of Frankliniella occidentalis, the predominant vector, in the presence of latently infected stock plants resulted in a high incidence of disease in the chrysanthemum
production field. The incidence of disease was low when the vector thrips were not abundant in spite of the presence of latently
infected stock plants. These results suggest that an infestation of the vector thrips causes severe secondary spread of TSWV
originating from latently infected stock plants in chrysanthemum production fields.
Received 27 July 2001/ Accepted in revised form 27 November 2001 相似文献
3.
Shohei KOBAYASHI Natsuko KAWANO Kenji MIYADO Ryo OHTA Takahiro AKIMOTO Taichi HATAKEYAMA Maiko KAWAGUCHI 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2022,84(1):153
Tris(1,3-dichloro-2-propyl) phosphate (TDCIPP) is widely used as a flame retardant and is known to exhibit anti-androgenic effects in vitro and in vivo. To assess the reproductive toxicity potency of TDCIPP, we investigated the effects of 7 days of TDCIPP oral administration on epididymal sperm motion and concentration in adult male Wistar–Imamichi rats. Thirty-five days after the final administration, sperm parameters were evaluated by computer-assisted sperm analysis. Results showed that sperm swimming progression and vigor and sperm concentration in TDCIPP-treated rats were unexpectedly higher than those in control rats. TDCIPP did not significantly affect the percentage of motile sperms or sperm swimming pattern. These results contribute to the understanding of the biological effects of TDCIPP. 相似文献
4.
<正>Dear Editor,Rice is an important staple food crop in Asia, but the anaerobic soil conditions in rice fields cause emission of the potent greenhouse gas, methane(CH4)(Le Mer and Roger,2001), and promote the accumulation of arsenic(As) in the grain(Le Mer and Roger, 2001; Khanam et al., 2020).To facilitate sustainable agriculture, using wastewater as an organic fertilizer is essential for reducing wastewater treatment-associated energy consumption and the recycling of wastewate... 相似文献
5.
Journal of Plant Diseases and Protection - Three isolates of chrysanthemum white rust fungus, Puccinia horiana, were collected from two regions in Hiroshima Prefecture, Japan, in 2017. In an in... 相似文献
6.
7.
Fumihiko OKUMURA Takeshi SHIMOGIRI Kotaro KAWABE Shin OKAMOTO Masahide NISHIBORI Yoshio YAMAMOTO Yoshizane MAEDA 《Animal Science Journal》2006,77(2):188-195
The gene constitution of polymorphisms of the four calpain genes (µ‐calpain, m‐calpain, p94, and µ/m‐calpain) were analyzed in South‐East Asian native chickens, White Leghorn and Broiler commercial chickens, and Red and Green jungle fowl. Polymorphisms were detected at all loci in chickens and Red jungle fowl, but only for CAPN1 (µ‐calpain gene) in Green jungle fowl. CAPN2 and CAPN1.5 are linked on chicken chromosome 3, and the genotype for these loci were treated as haplotype. Some combinations of calpain loci were tested using principal component analysis, and the best combination (CAPN1, CAPN3, and CAPN1.5) was determined. The proportion of polymorphic loci (Ppoly) and heterozygosity (H?) were 1.00 and 0.316–0.465 in domestic chickens and red jungle fowl, and 0.33 and 0.137 in Green jungle fowl, respectively. GST values suggested that the degree of subdivision among native chickens was relatively low except for Thailand, which was highest. Pair‐wise FST testing, dendrogram and principal component analysis from the results of calpain loci showed that the four South‐East Asian native and commercial chicken populations were close genetically. 相似文献
8.
9.
Masahiro MIYABE Azusa GIN Eri ONOZAWA Mana DAIMON Hana YAMADA Hitomi ODA Akihiro MORI Yutaka MOMOTA Daigo AZAKAMI Ichiro YAMAMOTO Mariko MOCHIZUKI Toshinori SAKO Katsutoshi TAMURA Katsumi ISHIOKA 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2015,77(10):1201-1206
G protein-coupled receptor (GPR) 120 is an unsaturated fatty acid receptor, which is
associated with various physiological functions. It is reported that the genetic variant
of GPR120, p.Arg270His, is detected more in obese people, and this genetic variation
functionally relates to obesity in humans. Obesity is a common nutritional disorder also
in dogs, but the genetic factors have not ever been identified in dogs. In this study, we
investigated the molecular structure of canine GPR120 and searched for candidate genetic
variants which may relate to obesity in dogs. Canine GPR120 was highly homologous to those
of other species, and seven transmembrane domains and two N-glycosylation sites were
conserved. GPR120 mRNA was expressed in lung, jejunum, ileum, colon, hypothalamus,
hippocampus, spinal cord, bone marrow, dermis and white adipose tissues in dogs, as those
in mice and humans. Genetic variants of GPR120 were explored in client-owned 141 dogs,
resulting in that 5 synonymous and 4 non-synonymous variants were found. The variant
c.595C>A (p.Pro199Thr) was found in 40 dogs, and the gene frequency was significantly
higher in dogs with higher body condition scores, i.e. 0.320 in BCS4–5 dogs, 0.175 in BCS3
dogs and 0.000 in BCS2 dogs. We conclude that c.595C>A (p.Pro199Thr) is a candidate
variant relating to obesity, which may be helpful for nutritional management of dogs. 相似文献
10.
Yuki YAMAMOTO Yoshihiko KOBAYASHI Kiyoshi OKUDA 《The Journal of reproduction and development》2014,60(1):73-77
Isolated stromal cells from the ampullary and isthmic parts of bovine oviductal tissues
were cultured in monolayer and spheroid (cell aggregate) systems. Prostaglandin F2α (PGF)
plays a crucial role in oviductal contraction and is produced by oviductal epithelial
cells in cattle. Since stromal cells of many organs produce PGF, PGF production by bovine
oviductal stromal cells was investigated. After PGF synthesis was confirmed, the utility
of isolation and culture methods for oviductal stromal cells was evaluated by PGF
production in the present study. The homogeneity of the cells was > 99%. PGF production
of the cells was increased by tumor necrosis factor-α. The stromal cells aggregated and
formed a spheroid by the treatments with several reagents. PGF production was higher in
the spheroid culture than in the monolayer culture. The isolation and culture methods
described here will facilitate studies of the physiological function of bovine oviductal
stromal cells. 相似文献