الفهرس 
Materials and mithodsOnly 14 pages are availabe for public view
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Abstract
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SUMMARY
Six genetically different varieties of bar
crossed in a diallel mating design, excluding ree
F 1’s formed the experimental materials. Th
randomized complete block design with fou
materials were evaluated at Giza Research Stati
Ten competitive plants were selected random!
observation on days to heading, plant height, n
weight, total biomass production per plant and gr
The combining ability analysis for each tr
the method proposed by Griffing (1956). Cor
for combining ability ’and its interactions with en
method described by Singh (1973).
The obtained results can be summarized as f
• The ordinary analysis of variance rev
among genotypes for all studied characn
General combining ability variances
characters under both E I, E2 as well as
Specific combining ability variances v
under study except ofbiomass productior
General and specific combining ability
among parents and hybrids for the inves
Some of the parental lines could
progenitors for high expression of the l
•
•
•
•
(Hordeum vulgare L.) were
’cals. The six parents and their
xperiment was laid out with
eplications, The experimental
ARC under two sowing dates.
om each plot for recording the
f spikes per plant, 1000 kernel
yield per plant.
nent was carried out following
led analysis over environments
nments were conducted by the
ws:
d highly significant differences
ere significant for all studied
r environments.
significant for all characters
. plant under late planting date.
ects were frequently significant
ted characters.
effectively used as promising
acters under consideration and
55
that specific combinations with high ormance could be exploited in
hybrid production program.
• Evaluation of different parental line :Or general combining ability
revealed that:
•
Athanians for earliness.
Giza 123 for tallness, 1000 kern!
production per plant.
California Mariout for earliness, 1
biomass production per plant and m
C.C. 89 for tallness, more spikes pe
total biomass production per plant I
Evaluation of specific combining abili
investigated characters indicated tha
ability effects for grain yield per plant,
kernel weight were registered by the
parent no. 6.
The cross combinations characterized
effects involved at least one paren
therefore, could be useful for varietal ir
The bahaviour of a parent in cross COl
own performance, revealing the pot
combiners on the basis of their own pel
Varieties of Egyptian sources were fi
and yield components. Giza 123, C.I
be included in the national breeding pn
•
•
•
zeight and more total biomass
e spikes per plant, more total
grain yield.
ant, heavy kernel weight, more
grain yield per plant.
effects of different hybrids for
e greatest specific combining
j biomass production and 1000
)SS between parent no. 4 and
, high specific combining ability
• good general combiner and,
wement purpose.
lations generally agreed with its
lity of selecting good general
mance.
I to be good combiners for yield
9 and California Mariout should
un to improve yield character