This study was carried out at Karahta station, Department of Field Ccrops
researches, General Commission for Scientific Agriculture Researches
(GCSAR), Damascus Country Side, Syria during the 2009-2010and 2010-2011
growing seasons to estimate gene
action for grain yield and its components.
Seeds of the durum wheat hybrid (Sham5 X Azgar1) were grown in three
replicates. Results indicated that the used genotypes had good variation to be
used as parents in wheat hybridization program to achieve significant genetic
advance. Mean square results showed significant differences among mean
values of the five populations for all studied traits in the hybrid and in most
traits, epistasis or dominance gene action occupied the first rank to the genetic
effects. It was suggested that selection for most studied traits in the subsequent
generations is relatively more effective than in early generations.
A field experiment was conducted for two consecutive seasons 2006 – 2007
and 2007 – 2008 to investigate the effect of removing early developed buds on
growth, yield and some lint proprieties. Treatments involved in the experiment
included three le
vels of bud removal (0%, 50%, and 100%) at three times (one,
two and three weeks after budding). The treatments were arranged in FRCBD,
with three replications. Growth parameters (plant height, number of
nodes/plant, number of leaves/plant, and number of branches/plant) cotton
seed yield, lint yield and lint properties were investigated. The results revealed
that bud removal significantly increased plant height, number of nodes, cotton
seed yield and lint yield, uniformity (UR) and lint strength (HVI). Also the
results showed that, time of bud removal significantly affected growth
parameters, cotton seed yield and lint cotton. The results indicated that,
varieties and time of bud removal interaction had a significant affect on growth
parameters. While, percentage of bud removal and time of bud removal
interaction had a significant effect only on cotton seed yield and strength of lint.
The results showed that, there were significant difference between cultivars in
plant height and number of branches per plant, with cultivar Barakat – 90 the
best.
