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Yield of synthetic-derived bread wheat under varying moisture regimes.
Author(s)
Fida Mohammad Department of Plant Breeding and Genetics, KPK Agricultural University, Peshawar, Pakistan
Naqibullah Khan Department of Plant Breeding and Genetics, KPK Agricultural University, Peshawar, Pakistan
Iftikhar Hussain Khalil Department of Plant Breeding and Genetics, KPK Agricultural University, Peshawar, Pakistan
Ijaz Ahmad Department of Plant Breeding and Genetics, KPK Agricultural University, Peshawar, Pakistan
O. S. Abdalla International Center for Agricultural Research in the Dry Areas (ICARDA) Aleppo, Syria
S. Rajaram International Center for Agricultural Research in the Dry Areas (ICARDA) Aleppo, Syria
Ala’A Yaljarouka International Center for Agricultural Research in the Dry Areas (ICARDA) Aleppo, Syria
Shad K. Khalil Department of Agronomy, Khyber Pakhtunkhwa Agricultural University Peshawar, Pakistan
Abstract
Synthetic-derived bread wheat populations are used as sources of resistance genes for biotic and abiotic stresses. This study used direct field evaluation of synthetic-derived wheat lines to assess grain yield and its associated traits under varying moisture regimes during 2005-06 and 2006-07 at Tel Hadya and Breda, International Center for Agricultural Research in Dry Areas (ICARDA), Syria. Forty synthetic-derived wheat lines and 8 check cultivars were tested in 5 experiments using alpha-lattice design with 3 replicates. Analyses of variance revealed significant (p≤0.01) differences for grain yield and its associated traits except for biomass. Interactions due to genotype and environment were significant for all traits except for 1000-kernel weight. Phenotypic correlation coefficients of grain yield with grains spike-1, plant height and harvest index were r = 0.80**, r = 0.73** and r = 0.68**, respectively. Cluster analyses of genotypes and environments clarified the effects of yield components and phenology on grain yield. Based on the shift multiplicative model (SHMM) analyses for 48 genotypes and 5 environments, grains spike-1 and harvest index were the major contributing components towards grain yield. Frequency and distribution of precipitation during the crop cycle differentiated yield potential across years. However, performance of synthetic-derived lines at various moisture levels was not significantly affected within each year at Tel Hadya and thus can act as good sources for drought-prone environments. We identified some lines bearing T. tauschii germplasm with yields equal and superior in some of the yield components to that of the high-yielding cultivars used as checks, thus providing useful material to wheat breeders.
Publication Details
Page(s) 4103-4112
DOI DOI not available
Published Journal: Pakistan Journal of Botany, Volume: 42, Issue: 6, Year: 2010
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