caa a22 4500 477133797 CHVBK 20180405111711.0 cr unu---uuuuu 170330e19971101xx s 000 0 eng 10.1023/A:1003062512190 doi (NATIONALLICENCE)springer-10.1023/A:1003062512190 Factorial regression analysis of genotype by environment interaction in ryegrass populations, using both isozyme and climatic data as covariates [Elektronische Daten] [François Balfourier, Jose Oliveira, Gilles Charmet, Enrique Arbones] A sample of 58 natural ryegrass populations (Lolium perenne L.) from the French and Spanish oceanic coast was evaluated for three seasonal growth traits (i.e. spring, autumn and winter vigour traits) in 5 evaluation sites (three in France and two in Spain). This sample showed a high level of genotype (population) × environment (evaluation sites) interactions for the three agronomic traits. A factor regression analysis, using both isozyme frequencies of populations and climatic factors of evaluation sites as covariates, was carried out on a sub-sample of 30 populations in order to explain these interactions. This method succeeded in explaining most population × location interactions by the product of two covariates. For instance, for spring vigour trait, 72.8% of the interaction term could be explained by the use of two covariates: the PGI2-20 allelic frequency of populations and the minimum temperature of the coldest month of evaluation sites. This study shows the advantage of such a method for plant breeders who need to identify promising ryegrass populations for their breeding objectives. A number of genetic and evolutionary hypotheses are also discussed. Kluwer Academic Publishers, 1997 climatic factors nationallicence factor regression analysis nationallicence genotype by environment interactions nationallicence isozymes nationallicence Lolium perenne nationallicence natural populations nationallicence seasonal growth nationallicence Balfourier François Plant Breeding Station, Institut National de la Recherche Agronomique, 63039, Clermont-Ferrand, France aut Oliveira Jose Centro de Investigaciones Agrarias de Mabegondo, Apartado 10, 15080, La Coruna, Spain aut Charmet Gilles Plant Breeding Station, Institut National de la Recherche Agronomique, 63039, Clermont-Ferrand, France aut Arbones Enrique Centro de Investigaciones Agrarias de Mabegondo, Apartado 10, 15080, La Coruna, Spain aut Euphytica Kluwer Academic Publishers 98/1-2(1997-11-01), 37-46 0014-2336 98:1-2<37 1997 98 10681 https://doi.org/10.1023/A:1003062512190 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1003062512190 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Balfourier François Plant Breeding Station, Institut National de la Recherche Agronomique, 63039, Clermont-Ferrand, France aut NATIONALLICENCE 700 1- Oliveira Jose Centro de Investigaciones Agrarias de Mabegondo, Apartado 10, 15080, La Coruna, Spain aut NATIONALLICENCE 700 1- Charmet Gilles Plant Breeding Station, Institut National de la Recherche Agronomique, 63039, Clermont-Ferrand, France aut NATIONALLICENCE 700 1- Arbones Enrique Centro de Investigaciones Agrarias de Mabegondo, Apartado 10, 15080, La Coruna, Spain aut NATIONALLICENCE 773 0- Euphytica Kluwer Academic Publishers 98/1-2(1997-11-01), 37-46 0014-2336 98:1-2<37 1997 98 10681 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer