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Strategies and
Methodologies of Improving Rice Genotypes in Egypt
Abdallah AA*, Shimaa Badawy A ** and Badawi AT *
*Rice Research department, ARC
**Agronomy department, Faculty of Agriculture,
Kafrelsheikh University
Corresponding author E-mail:
abdnby@yahoo.com
Accepted 23 May 2012
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The present investigation was carried out at the
Experimental Farm of the Rice Research and Training
Center (RRTC), Sakha, Kafer EL-Shiekh, Egypt, during
the period from 2004 to 2011 rice growing seasons to
evaluate some Delta- Med materials under Egyptian
conditions and also to develop a new rice lines
using a crosses between Egyptian and Spain varieties
to enhance the former genotype yielding ability. A
total of 14 entries including 7 Egyptian varieties
i.e, Giza 177, Giza 178, Sakha 101, Sakha 102,
Sakha103, Sakha 104 and Giza 182 and 7 Spanish ones,
namely, Bala, Susan, Bahia, Bomba, Montsianejj ,
Senia and Tebre. The results showed that there were
significant differences between Egyptian varieties
and Delta-Med varieties as well as among each group
itself. The Egyptian varieties exceeded the
Delta-Med entries in grain yield and associated. For
Spanish and Delta-Med genotypes, grain yield were
generally low, had generally shorter duration and
higher 1000 grain weight. Using crosses between
Egyptian and Spain varieties to enhance the former
genotype yielding ability, these lines, along with a
specific breeding program designed for Spain
materials, to be evaluated in Spain in the few
coming years. The progenies from each cross were
advanced under normal conditions using the pedigree
method technique. The best selected lines from F6
generation (2010) were promoted to be grown as F7
generation in 2011 season. These lines were found to
be resistant to blast disease in addition to possess
useful traits associated with high yielding ability.
Phenotypic coefficient of variation (PCV) was high
for all the character studied and genotypic
coefficient of variability (GCV) showed the same
trend as for phenotypic coefficient of variability.
Heritability estimates were high for all studied
traits studied. Highly significant positive
phenotypic correlation coefficients were determined
between grain yield /plant and all yield a
Keywords:
Rice, Grain, Plant, Breeding, Yielding, Egypt.
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