The Influence Of Priming Two Cucumber Cultivar Seeds

J. Duhok Univ. Vol.13, No.1, (Agri. And Vet. Sciences) Pp 70-81, 2010
harvestings start from 10/8 to 29/8 and the total
yield plant -1 (kg).
Analysis of variance for each trait was done
according to RCBD (Steel and Torrie 1981). The
additive, dominant and environmental variances
were estimated by using EMS from Griffing
analysis (Griffing analysis 1956b, 1 st method,
model 1).
σ 2 A = 2 Ø 2 G.C.A
σ 2 D = Ø 2 S.C.A
MSe
σ 2 E = -----------
r
Their significance from zero tested according
to (Kempthorn 1957) method. Heritability in
broad sense H 2 (b.s) , narrow sense h 2 (n.s) concept
and average degree of dominance for each trait
were calculated as follow:
σ 2 G
H 2 (b.s) = -------------- X 100
σ 2 P
σ 2 A
h 2 (n.s) = ---------------X 100
σ 2 P
ā =
07
2
2
D
2
A
Correlation coefficients were estimated between
each two pairs of the studies traits by using
computer software depending on the LSMGP
system certified by Harvey (1987).
Correlation coefficients between the studied
traits were divided into direct and indirect effects
by using path coefficient analysis according to
the method mentioned by (AL-Rawi 1987).
RESULTS AND DISCUSSION
Table (2) revealed the mean values of parents
and their hybrids for eight traits. Duncan's
multiple range test showed significant
differences between genotypes (parents and their
hybrids) in all studied traits plant height (cm),
number of branches/plant, flowering date (day)
by counting the number of day from planting to
opening the first flower, number of flowers
inflorescence-1 number of fruits plant-1, average
weight of fruit (g), fruit length and diameter
(cm), early yield (kg/plant) . The results proved
that parent (1) was shorter than other genotypes
in height (61.00 cm) and parent (4) was the
longest one (113.33 cm).
Otherwise, hybrids 2x4 and 4x2 were longest
(92.00 cm), whereas the hybrid 1x3 was the
shortest in height (66.17 cm). The results
indicated that the largest number of branches
reached (9.33) in parent (1), and the lowest value
(6.50) in parent (3). The biggest number of
branches (9.17) was found in the hybrids (1x4,
2x1) and lowest number (6.50) for the hybrids
(3x1, 4x3).
These results concurred with Peter and Singh
(1974) , Ghoudhuri (1977) who found significant
differences for plant height and concurred with
Borikar et al. (1981) , Saha et al. (1991) in the
same table it can be noticed that parent (1) was
the earliest in date of flowering as compared to
other parents (89.66 days) , while parent (3)
could be considered the later one in this trait
(111.33 days). The lowest value in date of
flowering (98.33 days) was found in the hybrid
1x2, while the hybrid 3x4 was the most delaying
genotype in flowering (117.33 days). Similar
results were reported by Hassan et al. (1982)
who found existence of significant differences
among genotypes (parent and hybrids) of
eggplant in this trait. Number of flowers
inflorescence -1 was restricted between (1.86) for
parent (4) and (5.40) for parent (2). The hybrid
(4 x 2) gave the highest number of flowers
(4.06) whereas, the lowest number of flowers
inflorescence -1 (1.10) was found in the hybrid (3
x 2). The comparison between genotypes in the
number of fruits plant -1 ranged between (79.00)
in parent (1) and (22.55) in parent (4) , and
between (60.22) in hybrid( 1x 2) and ( 20.89) in
hybrid (3 x 4) . This might be interpreted that
parent (4) appeared to be contributing in
decreasing number of fruits plant -1 in their
hybrids to the contrary with the parent (1) which
shared in increasing this trait in their hybrids
.Similar results were reported by Dharmegowda
et al. (1979b) , (AL-hamdani , and Hassan
1999).
Average fruit weight ranged between (55.73 g)
for the parent (1) and (133.09 g) for the parent