
	Asian Journal of Crop Science
	Year: 2011 \| Volume: 3 \| Issue: 4 \| Page No.: 158-168 DOI: 10.3923/ajcs.2011.158.168

Pedigree Selection for Grain Yield in Spring Wheat (Triticum aestivum L.) under Drought Stress Conditions

M.A. Ali

Abstract: The objective of this study was to estimate the response to direct selection for grain yield/plant under normal and water stress conditions and study the correlated response of other studied traits. Two cycles of pedigree selection for grain yield/plant were practiced on a segregating population of wheat (Giza 168xSids 1) in the F₃-F₅ generations. Selection was practiced separately and over environments, at normal irrigation environment and drought stress irrigation environment. After the second cycle, the F_5-selected families were evaluated at the two environments. Pedigree selection for the two cycles at each environment showed 25.00 and 25.54% increase in grain yield/plant over the bulk samples for normal and drought stress selections, respectively, compared to 22.60% for selections over environments. The antagonistic selection was more efficient than synergistic selection in changing the mean. Selection for grain yield/plant was accompanied by late in heading date of 1.76, 4.07 and 0.13%, increase in plant height of 13.09, 9.79 and 7.38% and with decrease in 1000-grain weight of -2.01, -2.02 and -4.31% over the bulk sample when selection was practiced under normal, drought stress and over environments, respectively. Drought Susceptibility Index (DSI) was estimated for grain yield/plant. Four selected families i.e., No. 9 under normal environment, no. 71 under drought stress environment and no. 10 and 70 under over environments displayed DSI values less than one and the highest grain yield/plant. These families could be considered the best selected families resulted from selection for grain yield/plant. Pedigree selection for improving grain yield/plant was effective in isolating high yielding and drought tolerant genotypes.

PDF Fulltext XML References Citation Report Citation

RELATED ARTICLES:

•	Effect of Drought on Oryza glaberrima Rice Accessions and Oryza glaberrima Derived-lines

•	Physiologic Responses of Haloxylon aphyllum to Consecutive Tensions of Dryness and Study of Their Role in Improving Resistance to Dryness of Vase Twigs

•	Variation and Correlation of Phenotypic Traits Contributing to High Yield in KMR3-Oryza rufipogon Introgression Lines

•	Effectiveness of Selection in the F₃ and F₅ Generations in Grain Sorghum

•	Determining the Direct Selection Criteria for Identification of High Yielding Lines in Bread Wheat (Triticum aestivum L.) Bread Wheat (Triticum aestivum L.)

•	Responses of Some Bread Wheat (Triticum aestivum L.) Germplasm to Varying Drought Stress Conditions under Rainshelter

•	Assessment of Drought Tolerance in Barley Genotypes

•	Relationship Between Grain Yield and Some Agronomic Characters in Durum Wheat under Cold Dryland Conditions of Iran

How to cite this article:

M.A. Ali , 2011. Pedigree Selection for Grain Yield in Spring Wheat (Triticum aestivum L.) under Drought Stress Conditions. Asian Journal of Crop Science, 3: 158-168.

DOI: 10.3923/ajcs.2011.158.168

URL: https://scialert.net/abstract/?doi=ajcs.2011.158.168

COMMENT ON THIS PAPER

Navigation


		Online First
		Current Issue
		Previous Issues
		Editorial Board
		Submit a Manuscript
		Guide to Authors
		Subscribe to E-alerts

Indexed In


		ASCI-Database
		Asian Digital Library
		Google Scholar
		SCIMAGO

Science Alert