DÉTERMINISME GÉNÉTIQUE DES CARACTÈRES MORPHO-PHYSIOLOGIQUES LIÉS AU RENDEMENT CHEZ LE BLÉ DUR EN ZONE SEMI-ARIDE DES HAUTS PLATEAUX SÉTIFIENS, ALGÉRIE
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Date
2015-04
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European Scientific Journal
Abstract
Abstract
The present investigation was undertaken to study the inheritance
pattern of morpho-physiological traits: relative water content, excised leaf
water loss, flag leaf area and membrane stability, in an F3 population of
durum wheat (Triticum durum Desf.). The results reflected a satisfactory
range of variability in the evaluated traits. Range magnitude of the four traits
represented the equivalent of 5.0 to 11.4 times the least significant difference
at 5% level. Transgressors with variable frequency were observed for all the
measured traits. In fact 25% of the F3 lines showed a relative water content
greater than 85%, 3% has a flag leaf area superior to 26 cm², 8% had a low
leaf water loss rate and 11% expressed a low electrolyte leakage rate,
suggesting a high membrane stability. Medium to high broad sense
heritability estimates were noted for the measured traits. Medium to high
genetic gain expressed as percent of the base population mean was observed,
taking the following values: 11.0%, 24.0%, 68% and 88%, for relative water
European Scientific Journal April 2015 edition vol.11, No.12 ISSN: 1857 – 7881 (Print) e - ISSN 1857- 7431
content, flag leaf area, excised leaf water loss rate, and percent of cell injury,
respectively. Altogether, the obtained results indicated that the studied cross
population would be of interest in the breeding program and an effective
progress can be made through selection of these morpho-physiological
characters to enhance stress tolerance and grain yield potential