Variation in haematological parameters among inbred strains of rat

1981 ◽  
Vol 15 (3) ◽  
pp. 243-249 ◽  
Author(s):  
D. P. Lovell ◽  
R. K. Archer ◽  
Joan Riley ◽  
R. K. Morgan
Keyword(s):  
Genetic Variation ◽  
Analysis Of Variance ◽  
Inbred Strains ◽  
Factorial Analysis ◽  
Haematological Parameters ◽  
Powerful Method

Haematological determinations were carried out on 7 inbred strains of rats using a standardized procedure. Significant genetic variation was found for many of the parameters although none of the strains had values which could be termed pathological. Measurements also varied significantly from day to day. Factorial analysis of variance is shown to be a powerful method for the investigation of variation in haematological parameters.

RIB AND VERTEBRAL NUMBERS IN SWINE: II. GENETIC ASPECTS

1962 ◽  
Vol 42 (2) ◽  
pp. 240-251 ◽  
Author(s):  
H. T. Fredeen ◽  
J. A. Newman
Keyword(s):  
Genetic Variation ◽  
Genetic Correlation ◽  
Analysis Of Variance ◽  
Genetic Parameters ◽  
Bilateral Asymmetry ◽  
Vertebral Number

Genetic parameters for rib and vertebral number in swine were estimated from data for 4,219 pigs produced by 78 sires and 359 dams of the Lacombe breed. Regressions of offspring on mid-parent were.599 ±.017 for vertebral number and.734 ±.020 for rib number and the corresponding full sib correlations estimated from the analysis of variance were.591 ±.071 and.591 ±.060. The genetic correlation between these two skeletal traits was estimated as.813 ±.022 by the regression of offspring on mid-parent and.792 ±.016 by the analysis of components of covariance.Continuous genetic variation for both traits was demonstrated. The modal phenotype (i.e., 16 pairs of ribs and 22 vertebrae) produced progeny more uniform for both traits than did parents of non-modal phenotypes. Bilateral asymmetry (within-pig variance) was also least among progeny of "modal" parents.

Allocation of Attention to Visual and Nonvisual Perceptual Channels by Marksmen During Aiming: Skill-Level Differences

2019 ◽  
Vol 41 (6) ◽  
pp. 386-400
Author(s):  
Shamsi S. Monfared ◽  
Gershon Tenenbaum ◽  
Jonathan R. Folstein ◽  
K. Anders Ericsson
Keyword(s):  
Analysis Of Variance ◽  
Skill Level ◽  
Factorial Analysis ◽  
Attention Allocation ◽  
Verbal Reports ◽  
Skill Levels ◽  
Random Subset ◽  
Vision Condition ◽  
Actual Location ◽  
Expert To Novice

This study examined attention allocation in 30 marksmen categorized into 3 skill levels ranging from expert to novice. Each shooter performed 336 shooting trials. Half of the trials were performed under an occluded-vision condition and the rest under regular, unoccluded conditions. Immediately after completion of a random subset of shots (96 trials), shooters estimated the actual location of each shot, and on a random subset of trials (48 trials), shooters gave retrospective verbal reports. A mixed 3 × 2 factorial analysis of variance revealed that the expert marksmen performed and estimated their shots more accurately than the intermediate and novice marksmen, the intermediates performed like the experts under the full-vision condition and like novices under the occluded-vision condition, and the experts reported attending more to nonvisual information while they estimated their shots than did the novices. The findings advance our understanding of the mechanisms mediating expertise.

Preferences for Single Tone Stimuli

1974 ◽  
Vol 22 (2) ◽  
pp. 136-142 ◽  
Author(s):  
Steven K. Hedden
Keyword(s):  
Analysis Of Variance ◽  
Factorial Analysis ◽  
Wave Form ◽  
Music Majors ◽  
Single Tone ◽  
Main Effect ◽  
Pure Tones ◽  
Nonmusic Majors ◽  
Tonal Stimuli ◽  
Frequency Intensity

This research used a factorial analysis of variance to examine preferences for tonal stimuli that differed in frequency, intensity, or wave form. For the sample of music majors, wave form appeared to have the greatest effect on preferences; pure tones were most preferred. The main effect for intensity also was significant, as was the interaction of intensity and wave form. For the sample of nonmusic majors, the predominant influence on preferences seemed to be intensity. The nonmusic majors preferred the softer of the two levels. In addition, the main effect for wave form was significant, as were the interactions of wave form with intensity and frequency with intensity.

GENOTYPE × ENVIRONMENT INTERACTIONS IN SMOOTH BROMEGRASS. I. YIELD

1979 ◽  
Vol 21 (1) ◽  
pp. 57-63 ◽  
Author(s):  
Wai-Koon Tan ◽  
Geok-Yong Tan ◽  
P. D. Walton
Keyword(s):  
Genetic Variation ◽  
Analysis Of Variance ◽  
Combining Ability ◽  
Significant Variation ◽  
Diallel Cross ◽  
General Combining Ability ◽  
Bromus Inermis ◽  
Smooth Bromegrass ◽  
Combining Ability Analysis ◽  
Half Diallel

Twenty-one progenies and the parents of a 7 × 7 half diallel cross of smooth bromegrass (Bromus inermis Leyss.) were evaluated at four locations in Alberta in each of two years, for genetic variation and genetic by environment interactions in the expression of their yield potentials. Years, locations and their interactions were highly significant in the combined analysis of variance. Combining ability analysis revealed that general combining ability (GCA) and specific combining ability (SCA) were both important in the expression of yield, including spring, fall and annual yield, whereas GCA was more important than SCA for yield per area. Although the genotype × environment interactions were all highly significant, variation accounted for by combining ability effects was generally higher than the interaction effects of GCA and SCA respectively, with environments. High average GCA effects for spring, fall and annual yield were demonstrated for the clones UA5, UA9 and B42. These together with the high average SCA effects suggested that the three clones could be included in a synthetic to develop high yielding cultivars. The results suggested that recurrent selections involving multi-location and multi-year testing seems necessary in breeding for high yielding bromegrass cultivars in Alberta.

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