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Journal of Applied Sciences
  Year: 2018 | Volume: 18 | Issue: 3 | Page No.: 129-137
DOI: 10.3923/jas.2018.129.137
 
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Investigating Parent Combining Ability and Gene Interactions via Diallel Analysis Against Scald Resistance in Barley

Zerihun Jalata , Firew Mekbib , Berhane Lakew and Seid Ahmed

Abstract:
Background and Objective: Scald caused by Rhynchosporium cummune is among the most important disease causing significant yield losses in barley yield. The aim of this study was to investigate the nature of gene actions and combining ability of parents which is useful in designing effective breeding for scald resistant barleys. Materials and Methods: The present study was carried out on 28 barley genotypes (21 F1 crosses and 7 parents) at Holetta, Ethiopia, in two rows of 2.5 m plot length and 0.40 m width at 0.15 m spacing between plants in RCB design with three replications during 2015 main cropping season. Results: The analysis of variance for initial and final percentage ld severity and AUDPC for scald showed highly significant genotypic difference indicating suitability for improvement. The combining ability test showed highly significant variation due to general (GCA) and specific combining ability (SCA) indicating the importance of both additive and non-additive types of gene effects controlling scald resistance. It appears that HB42 and HB1307 with highly significant and negative GCA effects can be promising parents for development of scald resistance and about half of the F1 hybrids also showed negative heterosis estimates over mid parent for all the characters measured. Conclusion: The result suggested that, the resistant additive alleles found in HB42 and HB1307 parents would be fixed using diallel selective or biparental mating of segregants followed by selection.
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How to cite this article:

Zerihun Jalata, Firew Mekbib, Berhane Lakew and Seid Ahmed, 2018. Investigating Parent Combining Ability and Gene Interactions via Diallel Analysis Against Scald Resistance in Barley. Journal of Applied Sciences, 18: 129-137.

DOI: 10.3923/jas.2018.129.137

URL: https://scialert.net/abstract/?doi=jas.2018.129.137

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