Search Results - "Kachman, S.D."

Acute high environmental temperature and calcium-estrogen relationships in the hen by Mahmoud, K.Z. (North Carolina State University, Raleigh, NC.), Beck, M.M, Scheideler, S.E, Forman, M.F, Anderson, K.P, Kachman, S.D

“…Much is known about the effects of high environmental temperature (HT) on egg production, but very little is understood about the mechanisms that underlie…”
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Estimating milk, fat, and protein lactation curves with a test day model by Stanton, T L, Jones, L R, Everett, R W, Kachman, S D

“…Test day models were used to estimate lactation curves for milk, fat, protein, fat percentage, and protein percentage and to study the influence of age,…”
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Evolution of starvation resistance in Drosophila melanogaster: measurement of direct and correlated responses to artificial selection by SCHWASINGER‐SCHMIDT, T. E., KACHMAN, S. D., HARSHMAN, L. G.

“…Laboratory selection for resistance to starvation has been conducted under relatively controlled conditions to investigate direct and correlated responses to…”
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Transcriptional profiling of the sperm storage organs of Drosophila melanogaster by Prokupek, A.M, Kachman, S.D, Ladunga, I, Harshman, L.G

“…The occurrence of female sperm storage across taxa indicates the importance of this complex and dynamic process. Organs responsible for sperm storage (SSOs)…”
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Estimation of genetic parameters for average daily gain using models with competition effects by Chen, C.Y, Kachman, S.D, Johnson, R.K, Newman, S, Van Vleck, L.D

“…Components of variance for ADG with models including competition effects were estimated from data provided by the Pig Improvement Company on 11,235 pigs from 4…”
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Pregnancy rate and first-service conception rate in Angus heifers by Bormann, J. Minick, Totir, L.R, Kachman, S.D, Fernando, R.L, Wilson, D.E

“…The objective of this project was to determine the genetic control of conception rate, or pregnancy percentage in Angus beef heifers. Producers from 6 herds in…”
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Evaluating the Genetic Diversity of Triticale with Wheat and Rye SSR Markers by Kuleung, C, Baenziger, P.S, Kachman, S.D, Dweikat, I

“…Triticale (xTriticosecale Wittmack) is becoming increasingly important in agriculture and understanding its genetic diversity is essential for its continued…”
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Effects of social interactions on empirical responses to selection for average daily gain of boars by Chen, C.Y, Johnson, R.K, Newman, S, Kachman, S.D, Van Vleck, L.D

“…Effects of social interactions on responses to selection for ADG were examined with records of 9,720 boars from dam lines (1 and 2) and sire lines (3 and 4)…”
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Variation in herbivore-mediated indirect effects of an invasive plant on a native plant by Russell, F. Leland, Louda, Svata M., Rand, Tatyana A., Kachman, Stephen D.

“…Theory predicts that damage by a shared herbivore to a secondary host plant species may either be higher or lower in the vicinity of a preferred host plant…”
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Glyphosate-Induced Weed Shifts in Glyphosate-Resistant Corn or a Rotation of Glyphosate-Resistant Corn, Sugarbeet, and Spring Wheat by Wilson, Robert G, Miller, Stephen D, Westra, Philip, Kniss, Andrew R, Stahlman, Phillip W, Wicks, Gail W, Kachman, Stephen D

“…A field trial was conducted for 6 yr (1998 through 2003) at Scottsbluff, NE, to measure weed shifts following multiple applications of two rates of glyphosate…”
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Technical Note: Calculation of standard errors of estimates of genetic parameters with the multiple-trait derivative-free restricted maximal likelihood programs by Kachman, S.D, Van Vleck, L.D

“…The multiple-trait derivative-free REML set of programs was written to handle partially missing data for multiple-trait analyses as well as single-trait…”
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Evaluation of autoregressive covariance structures for test-day records of Holstein cows: estimates of parameters by Sawalha, R M, Keown, J F, Kachman, S D, Van Vleck, L D

“…The objective of this study was to compare test-day (TD) models with autoregressive covariance structures for the estimation of genetic and environmental…”
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Genetic evaluation of dairy cattle with test-day models with autoregressive covariance structures and with a 305-d model by Sawalha, R M, Keown, J F, Kachman, S D, Van Vleck, L D

“…This study compared genetic evaluations from 3 test-day (TD) models with different assumptions about the environmental covariance structure for TD records and…”
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Estimates of genetic parameters for Holstein cows for test-day yield traits with a random regression cubic spline model by DeGroot, B.J, Keown, J.F, Van Vleck, L.D, Kachman, S.D

“…Genetic parameters were estimated with restricted maximum likelihood for individual test-day milk, fat, and protein yields and somatic cell scores with a…”
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Parameter estimates for direct, maternal, and grandmaternal genetic effects for birth weight and weaning weight in Hereford cattle by Dodenhoff, J, Van Vleck, L.D, Kachman, S.D, Koch, R.M

“…Birth and weaning weights adjusted for age of dam from four lines of Hereford cattle were analyzed to determine the relationships among grand-maternal,…”
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Seasonal changes in carbohydrates in the root of Canada thistle (Cirsium arvense) and the disruption of these changes by herbicides by Wilson, R.G, Martin, A.R, Kachman, S.D

“…Roots of Canada thistle were excavated from the soil monthly from 1999 to 2001 near Scottsbluff, NE, to quantify the influence of changing soil temperature on…”
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Impact of candidate sire number and sire relatedness on DNA polymorphism-based measures of exclusion probability and probability of unambiguous parentage by Sherman, G.B, Kachman, S.D, Hungerford, L.L, Rupp, G.P, Fox, C.P, Brown, M.D, Feuz, B.M, Holm, T.R

“…Summary Genetic paternity testing can provide sire identity data for offspring when females have been exposed to multiple males. However, correct paternity…”
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Applications in survival analysis by Kachman, S.D

“…Survival or failure time traits such as herd life and days open are both important economically and pose a number of challenges to an analysis based on linear…”
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Fly ash as a liming material for corn production by Tarkalson, D.D, Hergert, G.W, Stevens, W.B, McCallister, D.L, Kachman, S.D

“…Fly ash produced as a by-product of subbituminous coal combustion can potentially serve as an alternative liming material without negatively affecting corn…”
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Effect of wheat straw treated with alkali on ruminal function and lactational performance of dairy cows by Haddad, S G, Grant, R J, Kachman, S D

“…Two experiments were conducted to evaluate the effects of wheat straw treated with alkali on ruminal function and lactational performance of dairy cows. In…”
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