Geographical, altitude and agro-ecological differentiation of isozyme and hordein genotypes of landrace barleys from Ethiopia: implications to germplasm conservation

摘要: An analysis of the variability genes encoding six isozyme systems (15 loci) and two storage proteins (2 in landrace barley from Ethiopia is reported. The materials consisted populations collected sites as low 1650 high 3750 meters, covering a wide range agro-ecological conditions geographical areas. Of 17 loci 7 were polymorphic 10 monomorphic when 95% criterion polymorphism was applied. Despite disproportionate loci, detected all this used. found to possess fairly mean number alleles per locus (A = 1.5), value expected heterozygosity (H 0.134) percentage (P 35.3%). FST= 0.474 for typical inbreeding species. result indicated that allelic richness concentrated altitude class 3 (2500–3000 m) followed by 1 (<2000 m). Altitude 2 (2000–2500) holds an intermediate place though it highest terms 0.245). Higher genetic diversity some regions such Shewa, Arsi, Bale compared others (Welo, Gamu Gofa, Gojam). Genetic differentiation among zones more profound than both altitudes regions. Correlation between phenotypic (Shannon-Weaver index) (H) isozyme/hordein revealed non significant associations except with respect zones. In general, highland areas central northern may be desirable situ conservation peripheral current rate varietal replacement.