Selection for age at reproduction changes pre‐mating period and mating frequency in Zeugodacus cucurbitae : impacts on insect quality control

2021 ◽  
Author(s):  
Takahisa Miyatake
Keyword(s):  
Quality Control ◽  
Mating Frequency ◽  
Mating Period ◽  
Selection For ◽  
Insect Quality

Multiple sire mating in swine; evidence of natural selection for mating efficiency

1961 ◽  
Vol 56 (1) ◽  
pp. 31-37 ◽  
Author(s):  
Lavon J. Sumption
Keyword(s):  
Natural Selection ◽  
Mating Behaviour ◽  
Animal Breeding ◽  
Evolutionary Significance ◽  
Mating Frequency ◽  
Combined Effects ◽  
Male And Female ◽  
Female Mating ◽  
Mating Efficiency ◽  
Selection For

Evidence of natural selection for certain aspects of mating efficiency in swine are advanced based on preliminary studies with thirty-one sires, fiftyeight dams and their progeny. Selective fertilization was conclusively demonstrated. Variations in male and female mating behaviour were sufficiently large to indicate considerable non-randomness of mating frequency under the conditions of multiple sire mating (i.e. group exposure of dams to selected sires). The combined effects of the separate phenomena of selective fertilization and mating behaviour are discussed in relation to their evolutionary significance in animal breeding.

scholarly journals Evidenţierea legităţilor de declanşare a epizootiilor baculovirale la H. Cunea

2020 ◽  
Author(s):  
Aurelia Stingaci ◽  
Keyword(s):  
Quality Control ◽  
Biological Material ◽  
Material Selection ◽  
Natural Populations ◽  
Local Production ◽  
Express Method ◽  
Selection For

In the paper there are presented the results of the researches of existing methods of quality control for cultures of insects for rearing is presented. A new express-method of biological material selection for H. cunea establishment has been approbated. This method may be suitable for monitoring of natural populations condition in systems of integrated plant protections of diferent agricultural, ornamental and forest crops with intensive anthropogenic loading.The results of the present study revealed the larvicidal potential of baculovirus isolates found in the larvae of H.cunea, local production of biopesticides, which will reduce the final cost of the product and will more accessible to farmer.

Responses in gilt traits measured during performance test, at mating and at farrowing with selection for components of efficient lean growth rate

1996 ◽  
Vol 63 (2) ◽  
pp. 235-241 ◽  
Author(s):  
J. C. Kerr ◽  
N. D. Cameron
Keyword(s):  
Growth Rate ◽  
Performance Test ◽  
Growth Traits ◽  
Live Weight ◽  
Selection Strategy ◽  
Mating Period ◽  
Lean Growth ◽  
Daily Food ◽  
Reproduction Traits ◽  
Selection For

AbstractThe responses in traits measured at the start of the mating period and at farrowing were examined after seven generations of divergent selection for daily food intake (DFI), lean food conversion (LFC), lean growth rate (LGA) on ad-\ibitum feeding and lean growth on scale feeding (LGS). Weight and backfat depth at mating were measured on 330 gilts and 74 boars, which were selected on the basis of performance test traits. Farrowing information was available on 259 gilts. At the start of the mating period, gilts selected for high DFI, LGA or LGS had similar live weights (135, 137 and 137 (s.e.d. 4·5) kg) but different backfat depths (20·3, 14·0 and 11·3 (s.e.d. 1·3) mm) while the corresponding low lines had different live weights (129, 117 and 124 kg), but similar backfat depths (17·5, 17·8 and 17·8 mm). Gilts selected for high LFC had lower mean live weight and backfat depth (114 kg and 10·7 mm) than gilts in the other selection lines. Conception rates of gilts selected for low DFI or high LGS were similar (0·62 and 0·64, s.e.d. 0·12) and lower than for the alternative selection strategies (0-78), but the low DFI gilts were significantly older at farrowing than gilts selected for high LGS (424 v. 408 (s.e.d. 5·5) days). Responses in live weight, backfat depth, age at mating and particular reproduction traits were selection strategy dependent, such that identification of relationships between growth and reproduction traits will require measurement of additional growth traits at an earlier age than in the current study

Mating frequency in male Japanese quail: crosses among selected and unselected lines

1983 ◽  
Vol 25 (5) ◽  
pp. 450-456 ◽  
Author(s):  
D. E. Bernon ◽  
P. B. Siegel
Keyword(s):  
Genetic Variation ◽  
Mating Behavior ◽  
Japanese Quail ◽  
Mating Frequency ◽  
Base Population ◽  
Selected Lines ◽  
Gland Size ◽  
Parental Lines ◽  
Selection For ◽  
Cloacal Gland

The genetics of mating behavior in Japanese quail was investigated in replicated lines selected for high or low number of completed matings and the random bred control which served as the base population for the selected lines. Comparisons involved the parental lines, F1, F2, and backcross generations. Results indicate that mating frequency is influenced by additive and nonadditive genetic variation with the former being the primary heritable influence. The relationships between mating behavior, cloacal gland size, and relative aggressiveness suggest that selection for mating frequency influences factors commonly affecting these traits.

scholarly journals Variance-based selection may explain general mating patterns in social insects

2008 ◽  
Vol 4 (3) ◽  
pp. 270-273 ◽  
Author(s):  
Olav Rueppell ◽  
Nels Johnson ◽  
Jan Rychtář
Keyword(s):  
Multiple Mating ◽  
Empirical Support ◽  
Mating Frequency ◽  
Colony Fitness ◽  
Colony Performance ◽  
Single Mating ◽  
Empirical Tests ◽  
Selection For ◽  
Interspecific Comparisons ◽  
Focal Task

Female mating frequency is one of the key parameters of social insect evolution. Several hypotheses have been suggested to explain multiple mating and considerable empirical research has led to conflicting results. Building on several earlier analyses, we present a simple general model that links the number of queen matings to variance in colony performance and this variance to average colony fitness. The model predicts selection for multiple mating if the average colony succeeds in a focal task, and selection for single mating if the average colony fails, irrespective of the proximate mechanism that links genetic diversity to colony fitness. Empirical support comes from interspecific comparisons, e.g. between the bee genera Apis and Bombus, and from data on several ant species, but more comprehensive empirical tests are needed.

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