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Table 2 Genetic diversity estimates for five barley populations in four decades (1976–2017)

From: Spatial and temporal genetic variation in Ethiopian barley (Hordeum vulgare L.) landraces as revealed by simple sequence repeat (SSR) markers

Population Year I (1976–1986)    Year II (1987–1996)    Year III (1997–2006)    Year IV (2007–2017)   
N PPL He N PPL He N PPL He N PPL He
Oromia 128 0.983 0.637a 37 0.973 0.611a 12 0.974 0.598 11 0.966 0.603
Amhara 45 0.987 0.589bc 14 0.967 0.577b 26 0.951 0.573 3 0.951 0.592
SNNP 24 0.892 0.547d 12 0.832 0.539c 6 0.901 0.563
Tigray 12 0.952 0.603b 34 0.977 0.598ab 9 0.879 0.561 2 0.955 0.595
B/Gumuz 9 0.938 0.505c  
Mean   0.945 0.576 0.937 0.581 0.935 0.577 0.943 0.588
  1. N sample size, PPL proportion of polymorphic loci within each population, He gene diversity; He values of the same year followed by same letter are not significantly different, (P < 0.05); means of P and He of the four year classes were tested by the t test and found not significantly different