akbar marzooghian

The aim of this study was to select of the barley superior lines based on some of morpho-phenological traits using various indices based on REML/BLUP model and as well as the SIIG index and comparison of these indices. A set of 17 promising lines along two checks were evaluated in a RCBD with three replications at three research stations including Zabol, Darab, and Gonbad Kavous during the 2020-2021 cropping year. The results showed that there was a significant difference between the test regions and genotypes in terms of all measured traits. The results obtained by REML model indicated that the highest and lowest heritability values were related to 1000-grain weight and grain filling period, respectively. The MTSI index identified lines G9, G2 and G3 as superior lines, while the FAI-BLUP index identified G13, G11 and G3 as the best lines based on their traits and grain yield. Based on the SIIG index, lines G7, G2, G8 and G17 were identified as the most superior lines. In general, by comparing the results obtained from different indices, selected lines with SIIG index due to high grain yield and high 1000-grain weight were chosen as selected genotypes for complementary tests. In addition, the selected genotypes using FAI-BLUP and MGIDI indices were early maturity and had a high 1000-grain weight, but their grain yield were lower than both checks of experiment.

The main purpose of this study was to explain the factors affecting the adoption and development of durum wheat cultivation in rural areas of five provinces of Fars, Khuzestan, Kerman, Ilam and Tehran in Iran using structural equation model. The required data were collrcted through a questionnaire, the reliability of which was determined by Cronbach's alpha coefficient and composite reliability index (CR); and the extracted mean variance index (AVE) was used to determine the convergent validity of the components. The statistical population of the study included all wheat farmers in the mentioned provinces. Statistical sample size was determined as 274 people using Krejcie and Morgan sample size table and statistical samples were selected using multi-stage sampling method with proportional assignment. The results indicated that the studid indices were desirable. Data analysis was performed in a structural equation modeling method using LISREL8.5 and SPSS22. The study results confirmed the positive and significant effect between the explanatory components affecting the willingness to adopt durum wheat cultivation; in addition, the structural equation model predicted, in total, 47 percent of the variable variations in the tendency to adopt durum wheat cultivation. Finally, the results of this study are expected to be useful in developing strategies for extension and development of durum wheat cultivation. In addition, this research can be useful for breeders to breed varieties appropriate to the wheat farmers` conditions and needs.

The analyses of genotype × environment interaction in multi-environment yield trials are very important for evaluation, selection and recommendation of crop varieties. The purpose of this study was to identify high yielding and stable barley lines for introduction in different regions of warm climates of the Iran.

17 barley promising lines (with two checks Auxin and WB-94-3) will be evaluated in two years (2017 – 2019) using RCBD with three replications in five stations of warm zone including Ahvaz, Darab, Zabol, Gonbad and Moghan.

The results of variance analysis showed that the effects of location, genotype and genotype × location, genotype × year and genotype × year × location interactions were significant at the 0.01 probability level. The polygon-view of GGE biplot led to the identification of four superior lines (G18, G10, G19, and G17), six poor lines and three mega-environments. Among the test locations, Gonbad had a high discriminating ability to show differences between the genotypes and Moghan showed the least of discriminating; Also, Gonbad showed the highest amount of broad sense heritability of grain yield (0.780) and Moghan showed the lowest amount of broad sense heritability of grain yield (0.018).

Comparison of the studied lines with the ideal genotype showed that lines G18, G10, G19 and G17 were the closest lines to the ideal genotype with high yield and relative yield stability. Finally, these four lines were selected as the top lines for additional studies.