Original scientific paper

Genetic gain and selection criteria effects on yield and yield components in barley (Hordeum vulgare L.) Abstract

ALOJZIJE LALIĆ ; Department for Cereal Breeding and Genetics, Agricultural Institute Osijek, Južno predgrađe 17, 31103 Osijek, Croatia
DARIO NOVOSELOVIĆ ; Department for Cereal Breeding and Genetics, Agricultural Institute Osijek, Južno predgrađe 17, 31103 Osijek, Croatia
JOSIP KOVAČEVIĆ ; Department for Cereal Breeding and Genetics, Agricultural Institute Osijek, Južno predgrađe 17, 31103 Osijek, Croatia
GEORG DREZNER ; Department for Cereal Breeding and Genetics, Agricultural Institute Osijek, Južno predgrađe 17, 31103 Osijek, Croatia
DARKO BABIĆ ; Department for Cereal Breeding and Genetics, Agricultural Institute Osijek, Južno predgrađe 17, 31103 Osijek, Croatia
IVAN ABIČIĆ ; Department for Cereal Breeding and Genetics, Agricultural Institute Osijek, Južno predgrađe 17, 31103 Osijek, Croatia
KREŠIMIR DVOJKOVIĆ ; Department for Cereal Breeding and Genetics, Agricultural Institute Osijek, Južno predgrađe 17, 31103 Osijek, Croatia

Abstract

Background and Purpose: The objective of this study was to evaluate
the efficiency and applicability of different selection criteria on grain yield and grain yield components for the purposes of optimizing barley breeding program.

Materials and Methods: The experimental material of the cross
Timura/Osk.4.208’2-84 included 150 and 26 lines of F4 generation developed by single seed descent (SSD) and pedigree method, respectively. Trial was set up as a randomized block design with three repetitions. The following traits were analyzed: stem length, number of spikes per plant, grain weight per primary spike, grain number per primary spike, grain yield per plant, single grain weight, harvest index and grain yield per plot.

Results: Genetic gain estimates showed that pedigree method was efficient for shorter stem, higher number of spikes per plant, and single grain weight and grain yield per plant while single seed descentmethod was superior for grain yield per plant. Direct genetic gain for grain yield per plot was 33.0% while indirect genetic gain varied from –18.99% to 21.7%, depending on the applied selection criteria. The most efficient indexed selection criteria for improving grain yield were Q12, Q15, Q8 and Q13.

Conclusion: The study indicated that the highest efficiency in grain yield per plot was accomplished by »Q« index multi-trait selection approach. Furthermore, plant selection could be directed to a specific traits but it should be carefully exerted due to unfavorable correlations that could cause gain losses in selection.

Keywords

barley; genetic gain; variability; heritability; selection criteria

Hrčak ID:

58269

URI

https://hrcak.srce.hr/58269

Publication date:

1.9.2010.

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