A half dialiel set of crosses Involving six parents L.. Bani Sewef, 2 and 3; Sohag 1, 2 and 3 were evaluated under three spnnkler irrigation every 4, 8 and 12 days in three separate experiments. In each experiment, the parental varieties and their possible crosses were arranged in a randomized complete block
design with three replications. Irrigation mean squares were significant for all the
studied traits. The effect of sprinkler irrigation every 8 days increased
significantly yield and some of Its components. While, the effect of sprinkler
Irrigation every 4 days had the highest value for quality characters. Mean
squares for genotypes, parents and FI hybrids were significant for all studied
traits except parent mean squares for numbr of spikes and semolina
percentage. The cross P4 z P5 had the highest grain and biological yields per
plant, but without significant superiority over the two crosses P2 x P5 and P3 x
P4. The cross P2 z P3 gave the highest values for dry and wet gluten
percentages. Mean squares for parents vs. crosses were significant for all traits
except straw yield and semolina percentage. Fi means were significantly higher
than parental mean for most traits.
The variance associated with general and specific combining abilities
were significant for all studied traits. Grain yield and wet gluten percentage
exhibited low GCAISCA ratio which Is less than unity. While the magnitude of
additive and non-additive types of gene action were similar for plant height. On
the other hand, high GCAISCA ratio, which exceeded the unity was detected for
other traits. The mean squares of Interaction between both types of combining
ability and irrigation treatments were significant for all studied traits, indicating
that both additive and non-additive types of gene action varied from irrigation
treatment to another. me parent P, for dry gluten, ,, P, and P, for protein
percentage, and 1000-kernel weight, P4 for pedunci. length, number of spikes,
straw and biological yields, and P, for grain yield and some of yield components
seemed to b. the best general conibinrs.
The most desirable SCA ffects were detected by crosses P1 z P. and P, x
P4 for peduncle length, P, x P, for short plant, P, x P, for number of
k,rn.lslspike, P, x P, and P, z P, for 1000-kernel weight, P, x P,, P, x P4, P, z P4
and P, xP,forstrawyield,P,xP,,P,xP,.P,zP,P,zP,,P,xP,andP,xP,for
grain yieldipl.ant, P, z P,, P, z P, and P, x P, for biological yield, P, z P,, P1 z P.,
P, z P, and P4 z P, for semolina percentage, P, z P, and P, z P, for dry gluten
percentage and P, z P, and P, z P, for wet gluten.
|
