This study was carried out through the cooperation between the Faculty of
Agriculture Tishreen University and the General Commission of Agricultural Scientific
Researches in Hama during 2013 and 2014 successive seasons.
Eight soft wheat(Triticumae
stivum)genotypes were crossed using half diallel method
.The(28) crosses were grown along with their parents in randomized complete block with
three replications to estimate general combiningability , specific combining ability, and
both mid and high parent heterosis for number of spikes /plant , number of grains /spike ,
thousand grain weight and grain yield.
The results indicated that both additive and non- additive types of gene action were
important in the inheritance of traits under study with preponderance of additive gene
effects for number of grains /spike and thousand grain weight,Non – additive gene effects
were pronounced in the inheritance of number of spikes /plant and grain yield.
High general combiners for thesecharacters were obtained and the most important
parents were: Bohouth 4- Douma 44828-Acsad1115- Golan2.
Many positive specific combiners having both mid and high parent heterosis and
derived from positive general combiners were obtained such as(Golan2×Cham10) –
(Acsad1115×Douma4)(Douma44828×Golan2) and (Douma 2×Golan2).
Results also indicated that some hybrids: (Douma44828×Golan2) (Bohouth6×Douma4)
(Douma44828×Cham10) (Douma2×Acsad1115) had heterosis compared to higher parent
for number of spikes /plant , number of grains / spike , Thousand grain weight and grain
yield..
This research was carried out to study some hattching egg traits and chick weight at
day old in black type of Syrian local hens and Egyptian Fayoumi strain , and study the
differences in egg traits and chicks which come from hybrization between Syr
ian black
male and Fayoumi female.
Results showed that the average egg weight of Syrian hens was 52.33 g and of
Fayoumi hens was 46.86 g .
The fertility rate increased in hybrid egg compared with parents . It was87.94% in
hybrid compared with 84.08% in Syrian hens and 77.22% in Fayoumi strain hens.
The day old hybrid chick weight increased compared with Fayoumi chick. It was 32g
in hybrid chicks while it was 30 g in Fayoumi chicks , and it was lower compared with
black Syrian chicks (35g). Hatchability rate was 89.5% and 92.3% in Syrian local hens
and Egyptian Fayoumi hens respectively .And this rate decreased to 82.6% for the hybrid .
Chicks hatched decreased to 69.2% for hybrid compared with 72.93%for Syrian local hens
and 69.44% for Egyptian Fayoumi hens .
The mortality of hybrid chicks was 3.3% , it was lower compared with mortality of
Fayoumi chicks (6.05%) and higher compared with mortality of Syrian chicks (2.22%).
This study was carried out in cooperation between the Faculty of
Agriculture, Damascus University and the General Commission for Scientific
Agricultural Research (GCSAR) in Karahta station of field crops researches
during two growing seasons (2003
-04 & 2004-05).
Four local improved barley lines and cultivars (female parents) were
crossed with five exotic lines and cultivars (male parents) using line × tester
method. The crosses were grown along with their parents in a randomized
complete block design (RCBD) with three replications to estimate general
combining ability (GCA), specific combining ability(SCA) and both mid and
high parent heterosis for number of spikes per plant, number of grains per
spike, thousand kernel weight, and grain yield per plant.
