Genotype x environment interactions in a core collection of French perennial ryegrass populations

1993 ◽  
Vol 86 (6) ◽  
pp. 731-736 ◽  
Author(s):  
G. Charmet ◽  
F. Balfourier ◽  
C. Ravel ◽  
J. -B. Denis
Keyword(s):  
Perennial Ryegrass ◽  
Core Collection ◽  
Genotype X Environment ◽  
Genotype X Environment Interactions

Genotype x environment interactions in mixtures of herbage grasses

1974 ◽  
Vol 82 (2) ◽  
pp. 371-376 ◽  
Author(s):  
F. England
Keyword(s):  
Adequate Explanation ◽  
Environmental Index ◽  
Genotype X Environment ◽  
Genotype X Environment Interactions

SummaryThe technique of regression on environmental index is used to examine the behaviour of varieties in monoculture and mixture. It is shown that, sometimes, single regressions for each variety do not provide an adequate explanation of the interactions between varieties and environments.

scholarly journals Performance of Three Primocane-fruiting Red Raspberry Cultivars in Ontario and Québec

1993 ◽  
Vol 118 (3) ◽  
pp. 388-392 ◽  
Author(s):  
Jean-Pierre Privé ◽  
J.A. Sullivan ◽  
J.T.A. Proctor ◽  
O.B. Allen
Keyword(s):  
Maximum Yield ◽  
Rubus Idaeus ◽  
Yield Potential ◽  
Red Raspberry ◽  
Genotype X Environment ◽  
Genotype X Environment Interactions ◽  
Consistent Performance

The influence of genotype x environment interactions on the performance of `Autumn Bliss' `Heritage' and `Redwing' primocane-fruiting (PF) red raspberry (Rubus idaeus L.) cultivars was studied at six sites across Ontario and Quebec during 1989 and 1990. Cultivar × location × year interactions were found for most vegetative and reproductive components analyzed. `Autumn Bliss' had the most consistent performance of the three cultivars in all location/year combinations, while `Redwing' varied greatly between environments. `Heritage' was always the latest-bearing of the three cultivars and failed to achieve its maximum yield potential in many of the northern locations.

The influence of crossing strategy on the potential for breeding new crop varieties

1992 ◽  
Vol 32 (1) ◽  
pp. 65
Author(s):  
PS Brennan ◽  
DG Butler
Keyword(s):  
Genetic Variance ◽  
Breeding Population ◽  
Stability Parameters ◽  
Genotype X Environment ◽  
Commercial Importance ◽  
Crop Varieties ◽  
Genotype X Environment Interactions ◽  
Probability Of Success ◽  
Breeding History ◽  
New Crop

Crosses between commercially acceptable varieties and introductions are most likely to generate segregation at many loci of commercial importance. The probability of recovery, after selfing, of individuals in which most of the favourable alleles have been accumulated is very low. Reducing the number of favourable alleles heterozygous in the breeding population would increase the probability of success. The utility of a single backcross (BC1) to the parent with the greatest number of favourable alleles was examined as a method of fixing commercially desirable alleles. The means for stability parameters for yield for BC1F2-derived populations were similar to those for F2-derived populations. The genetic variance for yield in 2 of the 3 crosses studied was greater for the BC1F2- than the F2-derived populations, while the genotype x environment interactions appeared to be smaller for the BC1F2 populations. This suggested that BC1F2-derived populations may be more productive, in terms of varietal production, than F2-derived populations, particularly in species with a long breeding history and/or a large number of desirable characteristics.

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