The pure selfed seeds of 12 type selected families (were growing in increase
B plots in 1999 growing season) were chosen four grades for seed fuzz all 12 families
before were massed to form the new nucleolus (Breeder's seed 2000) of Giza 83
colton variety belonging to Gossyp < /em>ium barbadense L. were used in the present
investigation were to study the depression in yield and quality.
The results indicated that the standard type of seed of Giza 83 (A) was the
earliest for families number 6. 8, 11 and 12, but the both types of seed; (B) naked
seed-coat complete nakedness and (D) the type complete Fuzziness exhibited the
lowest estimates of earliness and lint percentage compared with both the other types
of seed for the families number 1 and 5. The results showed significant differences
between the families under study and the four types of seed for boll weight, seed
index, lint index, seed cotton yieldlfeddan, lint yieldlfeddan, 2.5% S.L. and 50% S.L.
fiber length. Type of seed; (D) complete fuzziness exhibited coarser fiber than the
other types of seed for families 4 and 5, while, the standard type of seed (A) for
families 2 and 9 produced stronger lint. It could be concluded that the existence of the
off-type seeds among the true type varieties was dangerous. Therefore, the
successive production of pure seeds by the maintenance program, removing the off-
type plants out of the general farms and minimizing the period of production and
handling the certified seeds by the farmers would be helpful to avoid the occurrence
of varietal deterioration.