Mohammad Abd-Elgawad Emam - The Six International Conference

Report
Mohammad Abd Elgawad Emam
Assistant Lecturer , Agronomy
Department ,Faculty Of
Agriculture
Studies on breeding of some maize (Zea Mays, L)
inbred lines and their crosses under salinity
conditions
INTRODUCTION
• The rapid increase in the world population
demands an expansion of crop areas to raise
food production.
• Salinity is a worldwide problem, with more
than 6% of the world’s total land mass affected
by salinity (FAO,2010) .
• Therefore, More work are needed to improve
the productivity per unit area.
• The use of crops that have some degree of salt
tolerance can also be a possibility to overcome
the problems caused by salinity.
• So, screening of large number of genotypes of a
crop is necessary to identify the salt tolerant
germplasm for breeding programs to develop the
salt tolerant and high yielding crop varieties.
Potential Yield OF Maize as a Result of Soil Salinity
Affected
120%
R² = 0.9999
1.7
100%
2.5
Potential Yield
80%
3.8
60%
yield
5.9
Linear (yield)
40%
20%
0%
0
2
4
6
ECe ds/m
8
10
10, 0%
12
Selection by
molecular markers
• The applications of molecular markers, have
been used to screen DNA sequence variation
and among the crop species.
• Through this Possible technique applying fast
selection between different genotypes and
create new sources of genetic variation by
introducing new and favorable traits from
landraces and related crop species.
The objectives of this work
selection among different genotypes under salinity
conditions
create new sources of genetic variation by
introducing tolerant salt traits from landraces and
related crop species into commercial varieties
Selection by molecular
markers
between genotypes
Identify the gene
responsible for salt
tolerance
Gene transfer from landraces and
related crop species to Commercial
varieties
Application of infrared thermal imagery to
select tolerant Maize genotypes.
•Traditional methods of measuring Maize growth have
been time-long .
•Thermal infrared imaging (IR) is now an established
technology for the study of stomatal responses and for
phenotyping the stomatal behavior under different
environmental stresses.
•This approach can rapidly measure canopy
temperature (by different color on a camera screen)
over large areas and rapid and reliable method for
monitoring of whole plant response to water stress.
A visible image together with a corresponding thermal image for canopy
temperature of wheat genotypes under salinity stress

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