Journal ArticleDOI
The relationships between plant form, competitive ability and grain yield in a barley cross
John Hamblin,C. M. Donald +1 more
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TLDR
It is concluded that plant form in segregating generations of cereals may provide a valuable selection criterion for high grain yield in monocultures.Abstract:
The grain yield of F5 lines from a barley cross, grown in field plots, showed no correlation with F3 single plant grain yield. F5 grain yield did however show a significant inverse relationship with plant height and leaf length in the F3, especially at high levels of nitrogen. Shorter plants with shorter leaves in the F3 tended to produce lines of similar habit in the F5, and these characters were associated with lower F3 grain yield and higher F5 grain yield.read more
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Book ChapterDOI
The Biological Yield and Harvest Index of Cereals as Agronomic and Plant Breeding Criteria
C.M. Donald,John Hamblin +1 more
TL;DR: The chapter examines the interaction of biological yield, grain yield, and harvest index with plant density and the situation in which a number of varieties have precisely the same biological yield but different grain yields is graphically presented.
Journal ArticleDOI
Enhancement of inbreeding depression by dominance and suppression in Impatiens capensis
TL;DR: Plant density may influence patterns of natural selection both on mating system and on juvenile traits in natural Impatiens populations, indicating that larger plants competitively suppressed smaller plants in the high‐density treatments.
Book ChapterDOI
The Convergent Evolution of Annual Seed Crops in Agriculture
C. M. Donald,John Hamblin +1 more
TL;DR: It is considered that the yield potential of annual crop species increase at a faster rate than with empirical selection for yield if suitable ideotypes are identified.
Journal ArticleDOI
Yield potential in modern wheat varieties: its association with a less competitive ideotype
TL;DR: Data appear to support the idea that genes conferming yield potential through improved adaptation to the crop environment are associated with a less competitive phenotype, suggesting that the greater efficiency of the HYP lines, reflected in their higher yield, is related to their better adaptation to interplant competition.
References
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Journal ArticleDOI
The breeding of crop ideotypes
TL;DR: It is postulated that a successful crop ideotype will be a weak competitor, relative to its mass, and the like plants in the crop community will compete with each other to a minimum degree.
Book ChapterDOI
Competition Among Crop and Pasture Plants
TL;DR: The fuller understanding of competition among plants requires a greater knowledge of the response of plants to their environment, especially of theresponse to the environmental stresses created by neighbors.