TY  - JOUR
T1  - Genetic Diversity and Relatedness among Barley (<i>Hordium vulare L.</i>) Landraces from Diverse
Ecological Zones of Pakistan
AU - Raziq, Fazal AU - Khalil, Kifayatullah AU - Mujtaba Shah, Ghulam AU - Javed, Asif 
JO  - Botany Research Journal
VL  - 14
IS  - 2
SP  - 18
EP  - 32
PY  - 2021
DA  - 2001/08/19
SN  - 1995-4751
DO  - brj.2021.18.32
UR  - https://makhillpublications.co/view-article.php?doi=brj.2021.18.32
KW  - biological yield
KW  -harvest index
KW  -spike length
KW  -Barley
KW  -fertile tillers per plant
AB  - Barley landraces are the major genetic
resources of cultivated barley in Ethiopia. Lack of
adequate information on extent of landraces diversity
hinders conservation efforts and proper utilization of
genetic resource. A field experiment was conducted in
order to assess the extent of genetic diversity of barley
landraces collection from Southern Ethiopia. A total of 76
genotypes were evaluated during 2019 main cropping
season using augmented design at NARC Islamabad. Data
were recorded for quantitative and qualitative characters.
Analysis of variance indicated highly significant variation
among 76 accessions except awn length. Genotypic
Coefficient of Variations (GCV) varied from 4.36% for
biological yield to 13.22% for number of fertile tillers per
plant and phenotypic coefficient of variations varied from
6.40% for plant height to 16.27% for spike length.
Estimate of broad sense heritability varied from 38.75%
for spike length to 78.13 for grain yield. Estimates of
genetic advance as percent of mean ranged from 7.61%
for plant height to 23.01% for number of fertile tillers per
plant. Phenotypic and genotypic correlation analysis
indicated that grain yield had positive and significant
phenotypic and genotypic correlation with days to
maturity, grain filling period and plant height, number of
fertile tillers per plant, thousand seed weight, harvest
index and biological yield. Path analysis revealed that
plant height, thousand seed weight and number of fertile
tillers per plant showed positive and highest direct effect
on grain yield. Cluster analysis grouped 105 genotypes
into five groups and one genotype remains ungrouped.
Principal component analysis revealed that the variance of
31, 15, 12, 10 and 9% were extracted for first five PCs,
respectively which contributed 78% of total variation
among genotypes. Estimate of Shannon -Weaver diversity
index H&#146; varied from 0.09 for hoodedness to 0.97 for
kernel row number. Pooled over all traits within each
zone, H&#146; value ranged from 0.48 for Sidama to 0.69 for
South Omo and individual trait showed different levels of
diversity across different zones. In general, the result
indicated the existence of wider diversity among
the barley collection, showing opportunity to improve
important traits of the crop and need to conserve the
diversity. As future line work further investigation with
inclusion of informative molecular markers and
covering different producing area of the region will
allow to provide the complete picture of existing
diversity.
ER  -