The aim of this study was comparing between three potato cultivars: "Afamia,
Loulou and Tadmur" which are planted in two different times (spring time and autumn
time), for the plant old age and some yield properties and some quality properties. Aft
er
ripping and harvesting, result showed superior Loulou to Afamia and Tadmur in most
parameters at the two planting times, so the productivity of Loulou was more than Afamia
by 6 ton/h in the spring and 1.6 ton/h in the autumn. For the starch and dry matter content,
Loulou tubers in the two planting times contained more amount than the other cultivars,
and more than the global average (%14 starch, %22 dry matter).
Yhis study was investigated at Agriculture Faculty of Damascus university
during the agricultural season of 2012/2013 in order to determine the effect of
foliar spray with seaweed extract (5 and 10 g/l) and GA3 (50 and 100 ppm) on
the growth and p
roduction of local red onion (Baladi) at different levels of
irrigation (100, 75, and 50% of field capacity). Onion bulblets were planted in
pots and plants were treated when they had 3-4 leaves and every two weeks
until full vegetative growth.
This research was conducted at two distinct environmentally locations,
Jellien and Al-Somakiate belong to Dara'a Research Center, the General
Commission for Scientific Agricultural Research during 2011-2012 growing
season. 13 garden pea genotypes
were planted according to a randomized
complete block design with three replicates to study the performance of these
genotypes for 10 important quantitative traits and to detrmine the genotypic
and phenotypic coefficients of correlation between the traits studied.
Results showed that there were significant differences among the genotypes
for all traits studied at both distict locations. The genotypic correlation
coefficients were higher than corresponding phenotypic correlations, in
addition, the value and direction of correlation coefficient at both levels were
different from location to another. Green pod yield showed positive and
significant correlations with pod width, harvest index and 10-green pod weight
at Jellien location, and with pod length, pod width, pods number per plant and
10-green pod weight at Al-Somakiate location.
Genotypic and phenotypic coefficient of variance, broad and narrow-sense
heritability, expected genetic advance and relative genetic advance of earliness
characteristics in six pea hybrids produced by 4 x 4 half-diallel crossing scheme
were estima
ted. The results, in general, showed low values of phenotypic
coefficient of variance (in all crosses) of days to beginning of flowering and days
to marketable maturity; which may indicates to a low effect of environmental
variation on the expression of both these characters, but were medium to high
for number of low internodes and internode's length. Estimates of heritability
in broad sense were medium to high for days to beginning of flowering (0.42 –
0.90) and days to marketable maturity (0.42 – 0.91), and biased estimates of
narrow-sense heritability have been recorded in most of the crosses and in
majority of the parameters studied; so we can’t adopt them as reliable data.
The highest estimates of relative expected genetic advance of number for low
internodes have been observed in Mutant-3 x Dasargelo (25.95%) and
Dasargelo x Nassra (25.11 %) and for internode's length in Dasargelo x Oterlo
(37.31 %). The selection procedure can be effectively made for achievement
further improvement of internode's length in early segregating generations of
Dasargelo x Oterlo hybrid; because it has high values of genotypic coefficient of
variance, broad-sense heritability and relative expected genetic advance.
In a study conducted at Research Center of Dara'a, General Commission
for Scientific Agricultural Research during two growth seasons 2007/2008 and
2008/2009. 11 faba bean (Vicia faba L.) populations were planted in an
experiment designed randomize
d complete blocks design with three
replications. The objectives were investigation of phenotypic variance among
populations studied, to determine the relationship among number of yielded
branches plant -1, number of pods plant -1 , number of seeds pod -1, 10- green
pod weight (g) and yield of green pods plant -1 (g) using correlation and path
coefficient analysis. The combined analysis of variance showed highly
significant differences among populations under study and for all
characteristics studied, except number of yielded branches plant-1 where
differences were only significant. The correlation and path analysis studies
revealed that negative and highly significant relationship was found between
number of yielded branches plant -1 and yield of green pods plant-1, while was
positive and highly significant between yield of green pods plant-1 and 10-green
pod weight. All direct effects of components studied were negative in both
seasons, except 10-green pod weight, and these results suggested adopting the
last component as a selection index during making selection of high yielding
genotypes in faba bean populations. .
This study was conducted in the spring of 1999 in Al-Souida Region of
Syria, to know the effect of flower pollination by honeybees on flower and fruitset
and on the crop productivity of three varieties of apple. The experiment was
repeated in the
spring of 2001 on the same varieties in addition to others like
Yellow sport, but the weather conditions (spring-frost) didn’t allow to obtain
results.
Green tomato fruits of different studied hybrids such as, Amal, Steel,
Tartila, and 2-75/96, which had been grown in a greenhouse at Abi- Jarash
Farm were picked up and stored at temperatures of 12 c and 20 c for 29 days.
The fruits, which were st
ored at 12 c had been transferred to 9 cْ, and then
stored for an additional period of two weeks. The chemical composition of the
stored fruits was evaluated, which included: acidity percentage, total soluble
solids, and the quantity of vitamine C. The ratio of fruit weight loss during
storage was studied as well.
This study aimed to evaluate the F1 non ripening tomato hybrids for yield
components and some other biological and morphological traits in the green
house.
This investigation included the comparesion of six tomato hybrids during
tow years (1999,
2000). Under the green-house conditions.
It has been found significant differences among the investigated hybrids
regarding to yield, plant hight, leaves number, flowers number, and the periods
from germination to flowering, germination to ripening, and flowering to
ripening, but, there was no any significant variation in fruits number and fruit
setting rate.
This investigation is a mimesis to what usually happens in nature, where the
plants are normally exposed to sublethal environmental stresses before their
exposure to the lethal level of stresses.
The gradual increase of environmental stress, gives
plants a suffficient time
to prepare their defensive means to withstand the lethal level of stress. In order
to develope a suitable screening technique, it was essential to determine the
induction as well as the lethal levels of stress, as important components of such
proposed tool.
This technique was applied to screen some tomato genotypes, and assess the
genetic variability among them, in order to evaluate their salinity stress
response , and selecting the highly salt tolerant types.
The research was carried out in the fields of Akar plain in Tartous
province during two seasons (2013, 2014) to study the effect the three
multiplication methods (Slips as control, Seedling, Cut-seed tuber) on
growth and yield of two locally sprea
d sweet potato varieties. The
experimental design was a randomized complete block with three
replications. Data were analyzed using the statistical program GenStat 12.
