Visual Selection for Shell Size in Cepaea (Held.)

10.2307/3283 ◽  
1973 ◽  
Vol 42 (2) ◽  
pp. 247 ◽  
Author(s):  
C. R. Bantock ◽  
J. A. Bayley
Keyword(s):  
Visual Selection ◽  
Shell Size ◽  
Selection For

scholarly journals Eliminating Zygotic Seedlings in `Turpentine' Mango Rootstock Populations by Visual Roguing

HortScience ◽  
1994 ◽  
Vol 29 (4) ◽  
pp. 319-320 ◽  
Author(s):  
R.J. Schnell ◽  
R.J. Knight ◽  
D.M. Harkins ◽  
Gary Zill
Keyword(s):  
Mangifera Indica ◽  
Electrophoretic Analysis ◽  
Visual Selection ◽  
Enzyme Systems ◽  
Selection For

The ability to eliminate zygotic seedlings from the polyembryonic mango (Mangifera indica L.) rootstock `Turpentine' by visual roguing was investigated. Four selected populations, A) randomly selected plants, B) plants selected as off-types, C) seedlings that were of `Turpentine' phenotype, and D) seeds where a single seedling emerged, were examined using electrophoretic analysis and five enzyme systems. Significant differences (χ2 = 39.63, P< 0.001) were found among the four categories, with 28% of the random, 66% of the off-type, 10% of the true-to-type, and 54% of the monoembryonic seedlings being zygotic. These data indicate that visual selection for trueness-to-type and roguing for off-types is useful in reducing the frequency of zygotic seedlings among `Turpentine' rootstock plants.

From Saliency to Eye Gaze: Embodied Visual Selection for a Pan-Tilt-Based Robotic Head

2011 ◽  
pp. 135-146 ◽  
Author(s):  
Matei Mancas ◽  
Fiora Pirri ◽  
Matia Pizzoli
Keyword(s):  
Eye Gaze ◽  
Visual Selection ◽  
Selection For

scholarly journals Genetic parameters estimates and visual selection for leaves production in Ilex paraguariensis

Bragantia ◽  
2017 ◽  
Vol 76 (4) ◽  
pp. 492-500
Author(s):  
José Alfredo Sturion ◽  
Carlos André Stuepp ◽  
Ivar Wendling
Keyword(s):  
Genetic Parameters ◽  
Visual Selection ◽  
Ilex Paraguariensis ◽  
Selection For

Observed Gain from Visual Selection for Yield in Diverse Oat Populations 1

Crop Science ◽  
1976 ◽  
Vol 16 (2) ◽  
pp. 262-264 ◽  
Author(s):  
D. D. Stuthman ◽  
R. P. Steidl
Keyword(s):  
Visual Selection ◽  
Selection For

Visual Selection for Grain Yield in Barley 1

Crop Science ◽  
1964 ◽  
Vol 4 (5) ◽  
pp. 494-497 ◽  
Author(s):  
R. E. Atkins
Keyword(s):  
Grain Yield ◽  
Visual Selection ◽  
Selection For

Relationship of glaucousness and epicuticular wax quantity of wheat

1993 ◽  
Vol 73 (4) ◽  
pp. 961-967 ◽  
Author(s):  
J. M. Clarke ◽  
T. N. McCaig ◽  
R. M. DePauw
Keyword(s):  
Triticum Turgidum ◽  
Flag Leaf ◽  
Triticum Aestivum L ◽  
Epicuticular Wax ◽  
Visual Selection ◽  
Resistance To Insects ◽  
Triticum Spp ◽  
Selection For ◽  
Relationship Of

The quantity of epicuticular waxes of crops such as wheat (Triticum spp.) influences water relations, wettability by pesticide sprays, and resistance to insects and diseases. Determination of wax quantity for selection purposes is difficult, whereas visual selection for degree of glaucousness would be simple. However, the relationship between wax quantity and glaucousness is unclear. Common (T. aestivum L.) and durum (T. turgidum L. var. durum) inbred genotypes, nonglaucous/glaucous isogenics, and segregating families were grown under field conditions near Swift Current, Saskatchewan. Waxes were extracted with petroleum ether and determined gravimetrically for flag leaf sheaths, blades or spikes sampled 1–2 wk post-anthesis, and compared with visual glaucousness ratings. Wax quantity was generally lower for nonglaucous than for glaucous genotypes, but there was some overlap of observed quantities for the two groups. On average, wax was 44% greater for glaucous than for nonglaucous durum genotypes, and 32% greater for glaucous than for nonglaucous common wheat genotypes. Visual selection for glaucousness is thus likely to produce differences in epicuticular wax quantity, but the quantity difference would have to be verified at advanced generations. Key words: Triticum aestivum L., Triticum turgidum L. var. durum, glaucousness, epicuticular wax

Patterns and processes of heterochrony in lower Tertiary turritelline gastropods, U.S. Gulf and Atlantic Coastal Plains

1994 ◽  
Vol 68 (1) ◽  
pp. 80-95 ◽  
Author(s):  
Warren D. Allmon
Keyword(s):  
Soft Part ◽  
Coastal Plains ◽  
Form Versus ◽  
Shell Size ◽  
Shell Form ◽  
Single Process ◽  
Selection For ◽  
Patterns And Processes ◽  
Atlantic Coastal ◽  
Shell Sculpture

Heterochrony is an important component of evolutionary change in the shell sculpture of turritelline gastropods from Paleocene and Eocene sediments of the Gulf and Atlantic Coastal Plains. A survey of heterochronic modes in these gastropods indicates that peramorphosis is dominant over paedomorphosis, a result counter to the pattern previously reported in gastropods and most other groups. Although lack of ontogenetic age data makes firm conclusions impossible at present, peramorphic patterns may have been produced by more than a single process. Possible explanations for the dominance of peramorphosis in the evolution of shell form in this group include a bigger role for intrinsic constraint in controlling shell form versus soft-part anatomy, selection for larger shell size, and the chance discovery of only peramorphosis in this study.

Visual Selection for Forage Yield in Winter Wheat

Crop Science ◽  
1993 ◽  
Vol 33 (1) ◽  
pp. 41-45 ◽  
Author(s):  
Nasir Ud‐Din ◽  
Brett F. Carver ◽  
Eugene G. Krenzer
Keyword(s):  
Winter Wheat ◽  
Visual Selection ◽  
Forage Yield ◽  
Selection For

Effectiveness of Visual Selection for Early Clonal Generation Seedlings of Potato

Crop Science ◽  
1975 ◽  
Vol 15 (1) ◽  
pp. 15-18 ◽  
Author(s):  
G. C. C. Tai
Keyword(s):  
Visual Selection ◽  
Clonal Generation ◽  
Selection For
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