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"The prediction of producing desirable traits in offspring such as increased growth rate or superior meat, milk and wool production is a vital economic tool to the animal scientist. Summarizing the latest developments in genomics relating to animal breeding values and design of breeding programs, this new edition includes models of survival analysis, social interaction and sire and dam models, as well as advancements in the use of SNPs in the computation of genomic breeding values."-- Amazon.
Livestock --- Breeding --- Mathematical models.
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Wussten Sie, dass Roggen einmal unser wichtigstes Nahrungsmittel war, fehlendes Brot die Französische Revolution auslöste, es ohne Kartoffel keine Industrialisierung gegeben hätte und Mais die Verelendung ganzer italienischer Landstriche bewirkte? Auch die Krankheiten unserer Kulturpflanzen machten Geschichte. Seit dem frühen Mittelalter gefährdet ein Pilz, der Halluzinogene produziert, die Roggenernte und in Irland verhungerten wegen Kartoffelmissernten im 19. Jahrhundert rund eine Million Menschen. Weizen, Kartoffeln, Raps & Co. sind Teil unserer Kultur. Dazu gehört auch die Geschichte ihrer Produkte: Weißbrot, Bier, Whisky, Müsli, Zucker, Speiseöl, Cornflakes, Pommes und Chips. Kulturpflanzen verändern immer noch unsere Welt. So machen wir nun aus Mais und Raps auch Bioenergie und verarbeiten Kartoffeln zu Kunststoffen. Gentechnisch veränderte Maispflanzen schützen sich selbst vor gefräßigen Schädlingen. Dieses Buch präsentiert unsere neun wichtigsten Kulturpflanzen Weizen, Roggen, Gerste, Hafer, Triticale, Mais, Raps, Zuckerrüben und Kartoffeln. Jede von ihnen war eine bedeutende Innovation, ohne die unser heutiges Leben nicht so satt, zufrieden und sicher wäre. Der Autor Thomas Miedaner ist apl. Professor an der Universität Hohenheim und leitet in der dortigen Landessaatzuchtanstalt die Arbeitsgebiete Roggen und Biotischer Stress.
Plant science. --- Botany. --- Plant breeding. --- Plant Sciences. --- Plant Breeding/Biotechnology.
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This book contains the most comprehensive reviews on the latest development of switchgrass research including the agronomy of the plant, the use of endophytes and mycorrhizae for biomass production, genetics and breeding of bioenergy related traits, molecular genetics and molecular breeding, genomics, transgenics, processing, bioconversion, biosystem and chemical engineering, biomass production modeling, economics of switchgrass feedstock production etc. The book will be of interest and great value to the switchgrass research communities in both academia and industry and a handbook for agro
Switchgrass --- Energy crops. --- Genetic engineering. --- Breeding.
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Water birds --- Islands --- Ponds --- Habitat --- Breeding --- Environmental aspects
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The Prairie Habitat Joint Venture (PHJV) delivers conservation programs for the Canadian portion of the Prairie Pothole Region under the North American Waterfowl Management Plan. The PHJV Assessment was designed to evaluate biological assumptions and effectiveness of PHJV conservation activities. Our objectives were to 1) test whether waterfowl reproductive success increased in response to the full suite of PHJV habitat treatments, and 2) quantify the relationships between mallard (Anas platyrhynchos) vital rates and landscape variables. We focused on examining the association of mallard vital rates with covariates measured at the study-area scale. We collected information on vital rates from 3,214 radio-marked female mallards at 27 study areas mainly throughout the Aspen Parkland ecoregion of Manitoba, Saskatchewan, and Alberta in 1993-2000. We used a modeling framework and information-theoretic techniques to test hypotheses about putative effects of environmental covariates on adu lt female and duckling survival, nesting effort, and nest survival. Additionally, we constructed a stage-based matrix projection model of mallard population growth (l) to estimate the sensitivities of population growth rates to variation in vital rates. Nest survival was positively related to the amount of herbaceous vegetation on study areas and total precipitation for the 12 months prior to nesting. Nesting effort was positively related to wetland inundation in July. Duckling survival was positively related to the proportion of seasonal wetlands holding water in July and negatively related to the number of days in June and July when the minimum air temperature dropped below 10 C. Adult female survival rate was positively related to both the proportions of grassland and wetland habitats measured at the study-area scale (65 km2), though these factors interacted such that the positive relationship with proportion of wetlands was strongest on study sites with high proportions of grasslan d. The stage-based projection model constructed using mean vital rates indicated that populations were declining (mean [lambda]=0.95, median [lambda]=0.98, 5th percentile=0.68, 95th percentile=1.38). Variance-stabilized sensitivities indicated that population growth was most responsive to variation in vital rates for after-second-year birds and that nest survival was the single vital rate to which populations were most sensitive. A prospective simulation revealed that, as expected, sensitivity to nest survival is likely to decrease at higher levels of nest survival. Despite evidence that nest survival was higher in PHJV habitat treatments than surrounding habitats, our a priori PHJV treatment index was unrelated to mallard vital rates estimated at the 65-km2 scale. Although mallard populations were affected by several weather variables and land uses, efforts to increase populations should focus on improving nest survival rates, which currently are below approximately 30%.
Mallard --- Mallard --- Mallard --- Mallard --- Waterfowl management --- Nests --- Breeding --- Reproduction --- Habitat
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Water birds --- Water birds --- Islands --- Ponds --- Habitat --- Breeding --- Environmental aspects
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