Development and characterization of an adapted form ofdroopy, a diploid potato mutant deficient in abscisic acid     

H. De Jong  L. M. Kawchuk  W. K. Coleman  C. A. Verhaeghe  L. Russell  V. J. Burns  E. Tremblay-Deveau 《American Journal of Potato Research》2001,78(4):279-290

  相似文献   

Effect of seed production location on the performance of Russet Burbank clones in southern Australia     

J. F. M. Fennell  R. W. de Jong 《American Journal of Potato Research》1996,73(12):569-575

In this study, three clones of Russet Burbank were grown at five different seed production sites and one other clone was grown at three of these sites. Seed from these treatments was then evaluated at two commercial production sites, in Victoria and Tasmania. Production site had a significant effect on the subsequent performance. Plant establishment, vigor, maturity, and stem and tuber number per plant were influenced by seed production site. Seed from more southerly locations had increased plant emergence, greater early vigor, earlier maturity, and reduced stem and tuber numbers per plant. Differences between the Tasmanian, Ruen and Victorian Netted Gem clones were small and restricted to the numbers of stems and tubers produced, and some yield components. The Ballarat clone was late maturing and had a high total but low marketable yield due to high levels of oversized and misshapen tubers. However this clone also showed least dark end to the fried crisp. Interactions were detected between clone and seed production site but these have no practical significance.  相似文献   

Miscibility of flame retardant epoxy resin with poly(ethylene terephthalate) and the characterizations of the blends     

Hwan Chul Kim  Dong Hwan Kim  Jacky Park  Jong Cheol Lim  Young Wan Park 《Fibers and Polymers》2009,10(5):594-600

Epoxy resin containing bromine compound was melt blended with PET to obtain flame retardant polymer. The blend product was characterized by DSC, SEM, intrinsic viscosity and melt index measurements. The reaction between the epoxy group of DGEBBA (diglycidyl ether of brominated bisphenol A) and the carboxyl (or hydroxyl) end group of PET led to cross-linking of PET chains, and the intrinsic viscosity and melt index (MI) were increased in the range of equivalent amount of epoxy resin (within 1 %). DSC data revealed that the epoxy resin was not located in the crystalline region but was appeared in the amorphous region of PET matrix. Good miscibility of epoxy resin resulted in the decrease of crystallization temperature and glass transition temperature of PET. The blend was spun into fiber without any problems such as swelling or draw resonance, however, the mechanical properties were decreased as the amount of the DGEBBA was increased.  相似文献   

Map- vs. homology-based cloning for the recessive gene ol-2 conferring resistance to tomato powdery mildew     

Stefano Pavan  Zheng Zheng  Mariya Borisova  Petra van den Berg  Concetta Lotti  Claudio De Giovanni  Pim Lindhout  Hans de Jong  Luigi Ricciardi  Richard G. F. Visser  Yuling Bai 《Euphytica》2008,162(1):91-98

The recessive gene ol-2 confers papilla-associated and race-non-specific resistance to tomato powdery mildew caused by Oidium neolycopersici. In order to facilitate marker assisted selection (MAS) in practical breeding programmes, we identified two simple sequence repeat (SSR) markers and one cleaved amplified polymorphic sequence (CAPS) marker which are linked to the resistance locus and co-dominantly inherited. Aiming to provide a base for ol-2 positional cloning, we used a large segregating F₂ population to merge these markers with all the ol-2 linked amplified fragment length polymorphism (AFLP^®) markers previously identified in an integrated genetic map. By screening a tomato bacterial artificial chromosome (BAC) library, we detected two BAC clones containing two expressed sequence tags (ESTs) homologous to the gene mlo, responsible for powdery mildew resistance in barley, as well as an ol-2-linked marker. Chromosomal mapping by Fluorescence in situ Hybridization (FISH) revealed major signals of the two BAC DNAs in the pericentromeric heterochromatin of the short arm of chromosome 4, in the same region where the ol-2 gene was previously mapped. The genetic and cytogenetic co-localisation between ol-2 and tomato mlo-homologue(s), in addition to the similarity of ol-2 and mlo resistances for both genetic and phytopathological characteristics, suggests that ol-2 is likely a mlo-homologue. Thus, a homology-based cloning approach could be more suitable than positional cloning for ol-2 isolation.  相似文献   

World seed year number. Part 1     

J. J. de Jong 《Potato Research》1961,4(4):313-315

  相似文献   

Hepatotoxicosis in cattle associated with consumption of Punica granatum (pomegranate)          下载免费PDF全文

MH Hawes  IJ Gill 《Australian veterinary journal》2018,96(10):408-410

  相似文献   

Effects of road transportation on metabolic and immunological responses in Holstein heifers          下载免费PDF全文

Hyeok‐Joong Kang  In Kyu Lee  Min‐Yu Piao  Chae‐Won Kwak  Min Jeong Gu  Cheol Heui Yun  Hyun‐Jin Kim  Hyeon‐Ju Ahn  Hee‐Bal Kim  Gyeom‐Heon Kim  Soo‐Ki Kim  Jong‐Youl Ko  Jong K. Ha  Myunggi Baik 《Animal Science Journal》2017,88(1):140-148

This study examined the effects of road transportation on metabolic and immunological responses in dairy heifers. Twenty Holstein heifers in early pregnancy were divided into non‐transported (NT; n = 7) and transported (T; n = 13) groups. Blood was collected before transportation (BT), immediately after transportation for 100 km (T1) and 200 km (T2), and 24 h after transportation (AT). The T heifers had higher (P < 0.05) blood cortisol and non‐esterified fatty acid concentrations after T1 and T2 than did NT heifers. By contrast, the T heifers had lower (P < 0.05) serum triglyceride concentrations after T1 and T2 than had the NT heifers. The serum cortisol and triglyceride concentrations returned (P > 0.05) to the BT concentrations at 24 h AT in the T heifers. The granulocyte‐to‐lymphocyte ratio and the percentage of monocytes were higher (P < 0.05) after T2 in the T heifers than in the NT heifers, suggesting that transportation stress increased the numbers of innate immune cells. T heifers had higher (P < 0.01) plasma haptoglobin concentrations than NT heifers 24 h AT. In conclusion, transportation increased cortisol secretion and was correlated with increased metabolic responses and up‐regulation of peripheral innate immune cells in dairy heifers.  相似文献   

Implications of spatial averaging weather and soil moisture data for broad scale modelling activities     

R. De  Jong  J. Dumanski  A. Bootsma 《Soil Use and Management》1992,8(2):74-79

Abstract. Spatial averaging of data before or after modelling has important implications for large area land evaluation studies. Two procedures are evaluated for the spatial averaging of weather and soil moisture data before and after modelling (procedures A and B, respectively). The Thiessen polygon weighting technique is applied to a network of weather stations to derive daily weather values for the period 1955 to 1985 for 12 selected Agroecological Resource Areas (ARAs) on the Canadian prairies. These values are used in the model for procedure A. The components of the soil moisture balance for spring wheat are estimated with a budgeting model, assuming wheat is grown continuously for 30 years on soils with available water-holding capacities (AWCs) of 150 and 250 mm. In procedure B, the data from individual stations are used as input to the model and the same Thiessen polygon weighting coefficients are applied to the output variables. A comparison of the two procedures shows no significant difference for temperature-related variables such as frost dates, harvest date and cumulative potential evapotranspiration. The differences for moisture-related variables (soil moisture content at sowing, cumulative actual evapotranspiration, runoff and deep drainage) are often statistically significant, but the absolute differences are less than 10 mm at probability levels ranging from 10 to 90%. For many practical applications the two procedures give similar results.  相似文献   

Inheritance of pigmented tuber flesh in cultivated diploid potatoes   总被引：1，自引：0，他引：1  

H. De Jong 《American Journal of Potato Research》1987,64(7):337-343

In a genetic study with cultivated diploid potatoes the distribution of anthocyanin to the tuber flesh was found to be controlled by a single dominant allele. The gene symbolPf (pigmented flesh) is proposed. The geneI, which controls the distribution of pigment to the tuber skin, is necessary for the expression ofPf and is closely linked to thePf locus. ThePf gene is a potentially useful genetic marker which does not appear to be associated with any deleterious traits and can be screened for without laboratory equipment.  相似文献   

Reduction of salmonella infection of broilers by spray application of intestinal microflora: a longitudinal study   总被引：1，自引：0，他引：1  

E Goren  W A de Jong  P Doornenbal  N M Bolder  R W Mulder  A Jansen 《The Veterinary quarterly》1988,10(4):249-255

The Nurmi concept for diminishing salmonella infection of poultry by application of gastrointestinal microflora from adult birds into newly hatched chicks was tested in a field study in which 8 million broilers were involved. Half of the 284 flocks was treated in the hatchery by spray application of an undefined microflora propagated in SPF chicks. A significant reduction in salmonella-contaminated flocks, as well as in the number of infected broilers in these flocks was demonstrated. No undesirable side effects were detected. It was concluded that hygienic improvements in transportation and slaughtering of broilers are needed in order to maintain the reduced salmonella contamination rate.  相似文献