Combining ability vs. population performance of genetic resources in rye.

Publikations-Art

Zeitschriftenbeitrag

Autoren

Roux,S.R.; Miedaner,T.; Geiger,H.H.; Knopf,E.; Wilde,P. Wortmann,-H

Erscheinungsjahr

2003

Veröffentlicht in

Plant-Breeding-and-Seed-Science.

Band/Volume

48/2

Seite (von - bis)

45-48

The combining ability and population per se (pps) performance of genetic resources compared with several adapted populations were studied in 24 self-incompatible populations (19 genetic resources (from Belgium, China, CSFR [Czech and Slovak Federative Republic], Slovakia, Germany, Japan, Poland, and Russia) and 5 adapted cultivars (from Germany, Romania, and Poland)) of rye. All the genetic resources showed, on average, less grain yield in all experiments. For pps performance, the genetic resources showed a high genetic variance for yield, whereas the mean combining ability was only slightly reduced compared to the adapted testcrosses and had a low genetic variance. The pps and the mean testcross performance were highly correlated due to high genetic variance of the pps performance. Five genetic resources, namely cultivars Galma, AMD II/2, NEM 1, NEM 3, and NEM 4, produced grain yield similar to the adapted populations for both pps and testcross performances. There was no observed difference between the cultivars Brandts Marien and NEM 3 for testcross performance. The heterotic increased, defined as the difference between the testcross and the pps performance, ranged between 11.5 and 87.9%. The results clearly indicate that the genetic resources might be integrated in hybrid rye breeding programmes without previous selection for yield adaptation.