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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