Genotype-environment interaction in Cordia trichotoma (Vell.)Arráb.Ex Steud.progenies in two different soil conditions     

Wanderley dos Santos  Bruno Marchetti de Souza  Daniele Fernanda Zulian  Gilberto Terra Ribeiro Alves  Jo 《林业研究》2022,33(1):309-319

Investment in silvicultural techniques is notice-ably lacking,especially in breeding programs for non-con-ventional wood species.Studying genotype × environment interaction (G × E) is essential to the development of breed-ing programs.Thus,this study aimed to estimate genetic diversity of and the effects of G × E interaction on two prog-eny tests of Cordia trichotoma,including the estimation of genetic gain and genetic diversity after selection.For the experiment,30 progenies of C.trichotoma were tested at two sites with differing soil textures.Diameter at breast height (1.30 m above soil surface,dbh-cm),total height,diameter at 30 cm from the soil,first branch height,and survival were all monitored for four years.Statistical devi-ance,best linear unbiased estimator,and harmonic mean of relative performance of genetic values (MHPRVG) were all calculated to predict breeding values,estimate genetic parameters,and analyze deviance.All quantified traits varied significantly among progenies by soil type,with greatest variation recorded for genetic variability.Heritability of the progenies led to predictions of genetic gain,ranging from 7.73 to 15.45％,for dbh at four years of age.The calculated decrease in genetic diversity after selection showed that this parameter should be monitored in subsequent breed-ing cycles.G × E was low for all tests.The best-performing progenies proved most stable and best adapted to the differ-ent environmental conditions tested.  相似文献   

Comparison of Porcine circovirus type 2 (PCV2) infection in light and heavy pigs of market age on farms with routine PCV2 vaccination     

Kwang-Soo Lyoo  Han Soo Joo  Peter R. Davies  Jeong Hee Han 《Canadian journal of veterinary research》2012,76(3):221-223

Commercial vaccines against Porcine circovirus type 2 (PCV2) are widely used on swine farms. Marked body weight variation at marketing age is a problem on conventional pig farms using all-in/all-out barn management. The aim of this study was to investigate whether PCV2 infection could be a factor influencing body weight variation. Seven conventional farms that routinely used PCV2 vaccination were selected, and 60 serum samples from light and heavy pigs at each site were tested for PCV2 antibody titers and viremia. At 3 farms the mean antibody titer, proportion of viremic pigs, and virus load differed significantly between the light and heavy groups. These preliminary results suggest that PCV2 infection may be a factor contributing to weight variation in vaccinated market-age hogs.  相似文献   

Phylogenetic analysis and characterization of Korean bovine viral diarrhea viruses   总被引：1，自引：0，他引：1  

Jae-Ku Oem  Bang-Hun Hyun  Sang-Ho Cha  Kyoung-Ki Lee  Seong-Hee Kim  Hye-Ryoung Kim  Choi-Kyu Park  Yi-Seok Joo 《Veterinary microbiology》2009,139(3-4):356-360

Thirty-six bovine viral disease viruses (BVDVs) were identified in bovine feces (n = 16), brains (n = 2), and aborted fetuses (n = 18) in Korea. To reveal the genetic diversity and characteristics of these Korean strains, the sequences of their 5′-untranslated regions (5′-UTRs) were determined and then compared with published reference sequences. Neighbor-joining phylogenetic analysis revealed that most of the Korean viruses were of the BVDV subtypes 1a (n = 17) or 2a (n = 17). The remaining strains were of subtypes 1b (n = 1) and 1n (n = 1). This analysis indicates that the 1a and 2a BVDV subtypes are predominant and widespread in Korea. In addition, the prevalence of BVDV-2 was markedly higher in aborted fetuses than in other samples and was more often associated with reproductive problems and significant mortality in cattle.  相似文献   

Infrared spectroscopy characterization of normal and lung cancer cells originated from epithelium     

So Yeong Lee  Kyong-Ah Yoon  Soo Hwa Jang  Erdene Ochir Ganbold  Dembereldorj Uuriintuya  Sang-Mo Shin  Pan Dong Ryu  Sang-Woo Joo 《Journal of veterinary science (Suw?n-si, Korea)》2009,10(4):299-304

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Histological differences in full-thickness vs. lamellar corneal pig-to-rabbit xenotransplantation     

Joo Youn Oh†‡  Mee Kum Kim†‡  Jung Hwa Ko†‡  Hyun Ju Lee†‡  Chung-gyu Park‡§  Sang Joon Kim‡¶  Won Ryang Wee†‡  Jin Hak Lee† 《Veterinary ophthalmology》2009,12(2):78-82

To evaluate the differences in graft survival and histopathological characteristics between full-thickness and lamellar orthotopic corneal xenotransplantation in a pig-to-rabbit model, we orthotopically transplanted a full-thickness or the anterior half of a pig's cornea onto the OD of 16 rabbits. As a result, the median survival were 16.83 and 29.07 days for the full-thickness and lamellar xenografts, respectively ( P  = 0.0005). Histologically, the full-thickness corneal xenografts had massive infiltration by eosinophils, whereas the lamellar xenografts showed predominantly mononuclear infiltrates ( P  < 0.05). Given these preliminary findings, lamellar corneal xenografts in rabbits survived longer than the full-thickness xenografts and each type of graft demonstrated different rejection mechanisms.  相似文献   

Effect of Burkholderia sp. KCTC 11096BP on some physiochemical attributes of cucumber     

Sang-Mo Kang  Muhammad Hamayun  Gil-Jae Joo  Abdul Latif Khan  Yoon-Ha Kim  Sang-Kuk Kim  Hyung-Jin Jeong  In-Jung Lee 《European Journal of Soil Biology》2010,46(3-4):264-268

Plant growth promoting rhizobacteria (PGPR) has been a focus of research for its potential as an eco-friendly alternative to chemical fertilizers in the agriculture industry. In current study, the effect of culture suspension (CS) of a novel gibberellins (GAs) producing bacterial strain Burkholderia sp. KCTC 11096BP, was observed on shoot length, shoot fresh and dry biomass, root fresh and dry biomass, chlorophyll contents, endogenous bioactive GAs (GA₁ and GA₄) and their immediate precursors, abscisic acid (ABA), soluble sugar contents and crude protein contents of cucumber (Cucumis sativus L.). We found that growth attributes of cucumber were significantly promoted by the application of CS of Burkholderia sp. KCTC 11096BP. The quantity of GA₁ and GA₄ and their immediate precursors GA₂₀ and GA₉ respectively, were also significantly promoted as compared to their respective controls. Contrary to GAs, the quantity of endogenous free ABA in cucumber leaves was much lower in bacterial CS treated plants. Soluble sugar contents and crude protein contents of cucumber leaves were also significantly higher in bacterial CS treatments as compared to control. It was concluded that Burkholderia sp. KCTC 11096BP can be used as an eco-friendly bio-fertilizer in our farming systems.  相似文献   

Virological and immunological responses to porcine reproductive and respiratory syndrome virus in a large population of gilts   总被引：7，自引：0，他引：7       下载免费PDF全文

Laura Batista  Carlos Pijoan  Scott Dee  Michael Olin  Thomas Molitor  Han Soo Joo  Zhenguo Xiao    Michael Murtaugh 《Canadian journal of veterinary research》2004,68(4):267-273

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Effects of dietary conjugated linoleic acid on fatty acid composition, lipid oxidation, color, and water-holding capacity of pork loin   总被引：19，自引：0，他引：19  

Joo ST  Lee JI  Ha YL  Park GB 《Journal of animal science》2002,80(1):108-112

The effects of dietary conjugated linoleic acid (CLA) on fatty acid composition, lipid oxidation, and pork quality were investigated. Pigs (n = 20) were fed a diet containing 0, 1, 2.5, or 5% CLA for 4 wk and slaughtered at 105 kg. The longissimus thoracis et lumborum muscle was collected at 24 h postmortem. Pork loin chops (3 cm thick) were packaged aerobically and stored at 4 degrees C for 7 d. Samples were analyzed for ultimate pH, intramuscular fat content, fatty acid composition, thiobarbituric acid-reactive substances, color (L*, a*, b*), and water-holding capacity. Dietary CLA reduced the concentration of linoleic acid and increased CLA concentration in intramuscular fat of pork loin (P < 0.05). The concentration of CLA in muscle was increased with dietary CLA level and did not change during storage. Thiobarbituric acid-reactive substance value of control was higher than that of the CLA-fed groups (P < 0.05). Intramuscular fat content was increased by dietary CLA, and less purge loss was observed with samples from CLA-fed pigs (P < 0.05). Dietary CLA improved the color stability of pork loin during cold storage. After 7 d, lightness (L*) and yellowness (b*) of the 5% CLA-fed group were significantly lower than those of control (P < 0.05). The results indicated that the water-holding capacity of pork loin was increased with increased intramuscular fat content apparently caused by dietary CLA. Also, the data indicated that color stability of pork was improved with inhibition of lipid oxidation and changing of fatty acid composition by dietary CLA.  相似文献   

Influence of slaughter weight and sex on yield and quality grades of Hanwoo (Korean native cattle) carcasses     

Park GB  Moon SS  Ko YD  Ha JK  Lee JG  Chang HH  Joo ST 《Journal of animal science》2002,80(1):129-136

To assess the effects of slaughter weight and sex on APGS (Animal Products Grading Service) quality and APGS yield grade of Korean Hanwoo (n = 20,881) cattle, data were collected from cow, bull, and steer carcasses during a 1-yr period. Factors used to determine quality grade (marbling, meat color, fat color, texture, and overall maturity score) and yield grade (cold carcass weight, adjusted fat thickness, and longissimus muscle area) by the Korean grading system were recorded. Both yield and quality grades were improved (P < 0.01) with heavier slaughter weight, but there was no difference in yield grade for Hanwoo cattle classes heavier than 551 kg (P > 0.01). Longissimus muscle area, adjusted fat thickness, and marbling score increased (P < 0.01) with carcass weight. Bull carcasses showed higher yield but lower quality than those of cows or steers (P < 0.01). The quality grade of steer carcasses was higher (P < 0.01) than that of cow carcasses due to higher marbling scores, lower maturity scores, and heavier carcass weights. Hanwoo carcasses with larger longissimus muscle areas in relation to their carcass weight had lower APGS quality grades. The APGS quality grades were different between yield grade A and B carcasses (P < 0.01), but quality grade was not improved by increased fat thickness beyond the point of yield grade B. Adjusted fat thickness and marbling score showed significant (P < 0.01) differences among all yield grade classes, and this resulted in increased quality grade as yield grade decreased. Adjusted fat thickness showed the strongest correlation (r = -0.63) with yield grade, whereas marbling score had the strongest correlation (r = 0.81) with quality grade. Results showed a negative effect of castration on yield but a positive effect on quality. Also, data showed that Hanwoo carcasses with heavier weights had higher quality grades than those of lighter weight.  相似文献   

无辣品种(系)中的辣椒素合成酶的基因缺失有利于用SCAR标记早期检测辣度     

Choong-Jae lee Eun Young Yoo Joo Hyun Shin 《辣椒杂志》2005,(4):45-48

用辣椒品种ECW123R(C.annuum)与CM334(C.annuum)杂交,对其121个F2代单株进行的检测表明,辣椒素合成酶基因(CS)与C位点的共分离控制了辣味的表达.故我们认为CS与C紧密连锁.对四个辣味型品种和四个无辣味型品种的测序分析表明,无辣味型品种在CS的5'上游区有一长度为2529bp的缺失(基因序列)存在.我们已研究出该C位点的分子标记,可在植株苗期检测其辣度.根据该缺失序列,我们开发了5个SCAR标志,其中有两个为共显性.这些SCAR标记对早期检测无辣味型个体既方便又准确.  相似文献