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2008 - 481 p.

Genetic gain and genetic diversity in German winter barley cultivars

Ahlemeyer J., Aykut F., Köhler W., Friedt W., Ordon F.

During the last decades winter barley yield in Germany has increased by 72 kg per hectare and year. In order to determine the share of the genetic gain in this increase a set of 65 six-rowed and 52 two-rowed cultivars that were registered in Germany during the last 40 years were screened in 13-sited field experiments regarding yield and yield components as well as resistance to biotic and abiotic stresses. The annual genetic gain was estimated at 43 and 39 kg ha-1 for six- and two-rowed cultivars, respectively, accounting for about 50 percent of the increase estimated on farmers' fields. At the same time the genetic diversity as determined on the basis of 70 SSRs slightly decreased in the six-rowed cultivars and considerably increased in the two-rowed cultivars. First results for marker-trait associations detected between SSR loci and agronomically important traits are shown.

Mots-clés    

ALLEMAGNE, COMPOSANTE DE RENDEMENT, GAIN GENETIQUE, HORDEUM, ORGE, RENDEMENT, VARIATION GENETIQUE, VARIETE

Citer cet article    

Ahlemeyer J., Aykut F., Köhler W., Friedt W., Ordon F. Genetic gain and genetic diversity in German winter barley cultivars. In : Molina-Cano J.L. (ed.), Christou P. (ed.), Graner A. (ed.), Hammer K. (ed.), Jouve N. (ed.), Keller B. (ed.), Lasa J.M. (ed.), Powell W. (ed.), Royo C. (ed.), Shewry P. (ed.), Stanca A.M. (ed.). Cereal science and technology for feeding ten billion people: genomics era and beyond. Zaragoza : CIHEAM / IRTA, 2008. p. 43-47. (Options Méditerranéennes : Série A. Séminaires Méditerranéens; n. 81). Meeting of the Eucarpia Cereal Section, 2006/11/13-17, Lleida (Spain). http://om.ciheam.org/om/pdf/a81/00800800.pdf