Time filter

Source Type

Abdipur M.,Islamic Azad University at Gachsaran | Vaezi B.,Dryland Agriculture Research Station
Bulgarian Journal of Agricultural Science | Year: 2014

Multi-environment trials (MET) play an important role in selecting the best cultivars and/or agronomic practices to be usedin future years at different locations by assessing a cultivar’s stability across environments before its commercial release. Inorder to identify barley (Hordeum vulgare L.) genotypes that have high yield and stable performance across different locations,20 barley genotypes were studied across nine environments in Iran for three years in 2003-2005 growing season. Theexperimental layout was a randomized complete block design with four replications. The analysis of variance showed thatgenotype (G), environment (E) and their interaction were highly significant (P < 0.01) for grain yield. Highly significant G ×E effects indicated the necessity for testing barley genotypes in Iran at multiple locations. They accounted for 16.76%, 58.91%and 24.32% of the treatment combinations sum of square, respectively. In order to better control of Type-1 error rates, FGH1 andFGH2 tests were calculated. Based on FGollob 5 first IPCAs, based on FGH1, and FGH2 tests four first IPCAs were significant. Accordingto the results of IPCA1-4 and AMMI stability parameters (SIPC, EV, AMGE and ASV), genotype numbers of 16, 18,13 and 12 had the lowest amounts and were recognized as the stable genotypes. These genotypes, also based on biplot had thelowest interactions and located in center of biplot. Overall, genotype number of 16 was identified as the most stable genotypein this study. © 2014, National Centre for Agrarian Sciences. All rights reserved.

Heidarpur N.A.,Dryland Agriculture Research Station | Abdipur M.,Dryland Agriculture Research Station | Abdipur M.,Islamic Azad University at Gachsaran | Vaezi B.,Islamic Azad University at Gachsaran
Scientific Research and Essays | Year: 2011

In the arid and semi arid region of Iran, conventional tillage is mainly used (Moldboard plowing followed by two disc harrowing) for wheat production. Such a tillage system requires a high energy input and may also cause water loss and long-term soil physical degradation. This field study was conducted under dry conditions to determine whether or not the reduced tillage systems altered the bulk density and soil moisture content. Thus, five tillage treatments (T 1-moldboard plow + disc harrow as the conventional method, T 2- chisel plow + disc harrow, T 3- moldboard plow without inversion page + disk harrow, T 4- power harrow, and T 5- sweep plow + disk harrow) were studied during the three year period (2004 to 2007) in soils with silty clay loam texture. Soil moisture in four depths (0-10, 10-20, 20-30 and 30-40 cm) was measured at the flowering and grain filling stages. Generally, the lowest soil bulk density was obtained by T1 treatment. There were significant differences among tillage methods for soil moisture at the flowering stage (P < 0.05) and T 1 treatment had the highest value. There were no significant differences among soil tillage methods for soil moisture at the grain filling stage. Overall, chisel plow + disc harrow treatment was recognized as the best tillage method due to the remains of stored soils at the grain filling stage. © 2011 Academic Journals.

Dar Z.A.,Dryland Agriculture Research Station | Lone A.A.,Dryland Agriculture Research Station | Ali G.,Dryland Agriculture Research Station | Abidi I.,Dryland Agriculture Research Station | Gazal A.,Dryland Agriculture Research Station
Plant Archives | Year: 2014

The present study was conducted at Dryland Agriculture Research Station, SKUAST-K, India during Kharif 2013. Variability, broad sense heritability and genetic advance was estimated in 80 maize genotypes. Analysis of variance revealed that the mean sum of squares due to genotypes showed significant differences for all the 12 characters studied. Traits yield per plant, plant height, ear height, number of kernels per row, 100-kernel weight were showed high heritability accompanied with high to moderate genotypic and phenotypic coefficient of variation and genetic advance, which indicates that most likely the heritability is due to additive gene effects and selection may be effective in early generations for these traits. Whereas high to moderate heritability along with low estimates of genetic advance were observed for days to 50 per cent tasseling, days to 50 per cent silking, shelling percentage, ear length and days to maturity ear girth and number of kernel rows per ear. © 2014, Plant Archives. All rights reserved.

Dar Z.A.,Dryland Agriculture Research Station | Lone A.A.,Dryland Agriculture Research Station | Alaie B.A.,Dryland Agriculture Research Station | Ali G.,Dryland Agriculture Research Station | And 3 more authors.
Plant Archives | Year: 2015

The present investigation was conducted to assess the correlation coefficients among fifty maize inbred lines using eleven quantitative parameters viz., days to 50 per cent tasseling, days to 50 per cent silking, days to maturity, plant height, ear height, ear length, ear girth, number of kernel rows ear-1, number of kernels row-1, 100 grain weight and grain yield plant-1during Kharief 2014 and 2015. All other possible correlations were positive and significant. Plant height, ear height, ear girth, number of kernel rows ear-1, number of kernels row-1 and 100 grain weight showed positive and significant correlation coefficients with grain yield plant-1 at genotypic level hence, direct selection for these traits would be beneficial. Other traits viz., days to 50% tasseling, days to 50% silking and days to maturity were found to have negative and significant association with grain yield hence suggesting selection of early maturity lines. Ear girth exhibited highest positive correlation with grain yield plant-1.

Discover hidden collaborations