Agronomic performance of crosses between Nordic and exotic barleys

• Published in: Euphytica 1997, Vol.93 (2), p.239-248
• Main Authors: Vetelaeinen, M. (Swedish Univ. of Agricultural Sciences, Svaloev (Sweden). Dept. of Plant Breeding Research), Suominen, M, Nissilae, E
• Format: Article
• Language: English
• Subjects: Agronomy. Soil science and plant productions; Barley; Biological and medical sciences; CARACTERES DE RENDIMIENTO; COMPOSANTE DE RENDEMENT; Ecological conditions; Fundamental and applied biological sciences. Psychology; Generalities. Genetics. Plant material; GENETIC RESOURCES; Genetic resources, diversity; Genetics; Genetics and breeding of economic plants; GERMOPLASMA; GERMPLASM; HORDEUM SPONTANEUM; HORDEUM VULGARE; Interspecific and intergeneric hybridization, introgressions; Plant breeding; Plant breeding: fundamental aspects and methodology; Plant material; RECURSOS GENETICOS; RESSOURCE GENETIQUE; YIELD COMPONENTS
• ISSN: 0014-2336; 1573-5060
• DOI: 10.1023/A:1002936600262

Exotic germplasm may be useful for the improvement of agronomic performance of barley breeding material. This study was conducted in order 1) to evaluate if it is possible to improve performance of Nordic barley breeding material by utilizing exotic germplasm sources (unadapted landraces and H. spontaneum), 2) to evaluate incorporation of exotic germplasm into a genetic base widely adapted to the agro-ecological conditions of the extreme Scandinavian north as well as to the base adapted to the conditions of the south of this geographical region, and 3) to evaluate whether an index composed of several traits corresponded to 'breeder's phenotypic evaluation' of the progenies. Earliness, straw length, number of ears/plant, yield/plant, seed shattering, persistence of awns and an index computed from these traits were studied in Swedish and Finnish 4-way crosses along with their adapted parents. Most of the crosses headed earlier than their adapted parents and none of the crosses outyielded the adapted parents. The most favorable frequency distributions for the index were found in the crosses with only cultivated barleys as parents. Transgressive segregates were also found in progenies with H. spontaneum parents. Incorporation of exotic barleys was most successful into the local genetic base. Comparisons between indices and breeder's phenotypic evaluation suggested reconsideration of evaluation methods early in parent development.[PUBLICATION ABSTRACT]