INHERITANCE OF AGRONOMIC TRAITS AND GENETIC MARKERS FOR DROUGHT TOLERANCE IN MAIZE
MAHMOUD SHAWKY ABD EL-LATIF;
Abstract
Programs of maize breeding aim to develop new varieties characterized by superior economic traits as early tasseling and silking, high yield potentiality and flexibility in tolerance to unfavorable environmental conditions for growth in order to be more suitable with different environmental conditions and produce high yield under all conditions.
Therefore this research aimed to:
1. Study the genetic parameters for the correlated yield traits with drought tolerance.
2. Attempt to obtain genotypes of maize tolerant to drought stress.
3. Study the relationship between the ISSR-PCR and field results in an attempt to identify drought tolerant genotypes by using this technique.
The field experiments of this investigation were carried out at Giza Agricultural Research Station of the Agricultural Research Center (ARC) in the seasons from 2011 to 2013.
In the first growing season (2011), crossing was made among the four parents to produce the F1 hybrid grains of the two crosses; Gz-602 × Gz-628 (Cross I) and Sd-7 × Sd-63 (Cross П).
In the second growing season (2012), F1 hybrid's of the two crosses and the four inbred lines were sown and F1 plants of each cross were backcrossed to their respective parents to produce BC1 and BC2 grains. At the same time, some of the F1 plants for each cross were selfed to produce the F2 grains and parents were also selfed to maintain parental purity. In addition, crossing was made between the parental inbred lines again to produce additional new F1 grains for each cross.
In 2013 season, grains of the six populations i.e. P1, P2, F1, F2, BC1 and BC2 of the two crosses were grown in one experiment under drought stress conditions (preventing the 4th and 5th irrigations during flowering stage) at Giza Agricultural Research Station of the ARC on 1st May in a
97
SUMMARY
MAHMOUD S. ABD EL-LATIF Ph. D., 2014.
randomized complete blocks design with 3 replicates. Each replicate comprised one row for each parent and F1 cross, four rows for each
Therefore this research aimed to:
1. Study the genetic parameters for the correlated yield traits with drought tolerance.
2. Attempt to obtain genotypes of maize tolerant to drought stress.
3. Study the relationship between the ISSR-PCR and field results in an attempt to identify drought tolerant genotypes by using this technique.
The field experiments of this investigation were carried out at Giza Agricultural Research Station of the Agricultural Research Center (ARC) in the seasons from 2011 to 2013.
In the first growing season (2011), crossing was made among the four parents to produce the F1 hybrid grains of the two crosses; Gz-602 × Gz-628 (Cross I) and Sd-7 × Sd-63 (Cross П).
In the second growing season (2012), F1 hybrid's of the two crosses and the four inbred lines were sown and F1 plants of each cross were backcrossed to their respective parents to produce BC1 and BC2 grains. At the same time, some of the F1 plants for each cross were selfed to produce the F2 grains and parents were also selfed to maintain parental purity. In addition, crossing was made between the parental inbred lines again to produce additional new F1 grains for each cross.
In 2013 season, grains of the six populations i.e. P1, P2, F1, F2, BC1 and BC2 of the two crosses were grown in one experiment under drought stress conditions (preventing the 4th and 5th irrigations during flowering stage) at Giza Agricultural Research Station of the ARC on 1st May in a
97
SUMMARY
MAHMOUD S. ABD EL-LATIF Ph. D., 2014.
randomized complete blocks design with 3 replicates. Each replicate comprised one row for each parent and F1 cross, four rows for each
Other data
| Title | INHERITANCE OF AGRONOMIC TRAITS AND GENETIC MARKERS FOR DROUGHT TOLERANCE IN MAIZE | Other Titles | وراثة الصفات المحصولية والأدلة الوراثية لتحمل الجفاف في الذرة الشامية | Authors | MAHMOUD SHAWKY ABD EL-LATIF | Issue Date | 2014 |
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