scholarly journals Changes in Reproductive Traits Associated with Selection for Packed Erythrocyte Volume in Japanese Quail

1973 ◽  
Vol 52 (6) ◽  
pp. 2147-2152 ◽  
Author(s):  
K.W. Washburn ◽  
F.K.R. Stino
Keyword(s):  
Japanese Quail ◽  
Reproductive Traits ◽  
Erythrocyte Volume ◽  
Selection For ◽  
Packed Erythrocyte

scholarly journals DIVERGENT SELECTION UNDER TWO NUTRITIONAL ENVIRONMENTS FOR PACKED ERYTHROCYTE VOLUME IN JAPANESE QUAIL

Genetics ◽  
1973 ◽  
Vol 74 (2) ◽  
pp. 363-369
Author(s):  
F K R Stino ◽  
K W Washburn
Keyword(s):  
Japanese Quail ◽  
Coturnix Japonica ◽  
Coturnix Coturnix Japonica ◽  
Erythrocyte Volume ◽  
Adequate Diet ◽  
Coturnix Coturnix ◽  
Iron Copper ◽  
Stress Environment ◽  
Selection For ◽  
Packed Erythrocyte

ABSTRACT Two-way selection for two-week packed erythrocyte volume (PCV) was practiced for four generations under two nutritional environments in the Japanese quail (Coturnix coturnix japonica). One environment was an iron, copper-"adequate" diet and the other was iron, copper-deficient "stress" diet. Response to selection was greater in both directions under the adequate environment than under the stress environment. After four generations of selection there were 29% and 18% differences between the high and low lines under the adequate and the stress environments, respectively. An asymmetry of response was observed toward the low line under the adequate environment and toward the high line under the stress environment. The realized heritability estimates for the high and low Fe-Cu-adequate lines were.26 and.35, respectively, while those for the high and low Fe-Cu-deficient lines were.16 and.06, respectively.

scholarly journals Genetic Basis of Packed Erythrocyte Volume in Japanese Quail

1973 ◽  
Vol 52 (4) ◽  
pp. 1606-1610
Author(s):  
Farid K.R. Stino ◽  
Kenneth W. Washburn
Keyword(s):  
Japanese Quail ◽  
Genetic Basis ◽  
Erythrocyte Volume ◽  
Packed Erythrocyte

scholarly journals Induced defenses alter the strength and direction of natural selection on reproductive traits in common milkweed

2016 ◽  
Author(s):  
Ken A. Thompson ◽  
Kaitlin A. Cory ◽  
Marc T. J. Johnson
Keyword(s):  
Natural Selection ◽  
Jasmonic Acid ◽  
Reproductive Traits ◽  
Induced Defenses ◽  
Asclepias Syriaca ◽  
Ecological Processes ◽  
Foliar Damage ◽  
Antiherbivore Defenses ◽  
Selection For ◽  
Generate Plant

AbstractEvolutionary biologists have long sought to understand the ecological processes that generate plant reproductive diversity. Recent evidence indicates that constitutive antiherbivore defenses can alter natural selection on reproductive traits, but it is unclear whether induced defenses will have the same effect and whether reduced foliar damage in defended plants is the cause of this pattern. In a factorial field experiment using common milkweed, Asclepias syriaca, we induced plant defenses using jasmonic acid (JA) and imposed foliar damage using scissors. We found that JA-induced plants experienced selection for more inflorescences that were smaller in size (fewer flowers), while control plants only experienced a trend toward selection for larger inflorescences (more flowers); all effects were independent of foliar damage. Our results demonstrate that induced defenses can alter both the strength and direction of selection on reproductive traits, and suggest that antiherbivore defenses may promote the evolution of plant reproductive diversity.

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