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Showing 2 results for Bahraminejad
Reza Amiri, Sohbat Bahraminejad, Kianoosh Cheghamirza,
Volume 8, Issue 1 (8-2021)
Abstract
The study of the genetic structure controlling agronomic traits is one of the preconditions for selecting the appropriate breeding method. In order to analyze genetic of some agronomic traits of bread wheat using generation mean analysis, parents and different generations resulting from the cross of Marvdasht × MV-17 wheat cultivars were assessed in a randomized complete block design with three replicates under normal and terminal drought stress conditions in Research Farm of Razi University (Iran) during 2015-2016 cropping season. Based on the results of weighted ANOVA, a significant difference was observed between different generations for most of the studied traits under both conditions. Generations mean analysis revealed that in addition to the additive and dominance gene effects, a variety of epistatic effects also played a role in the inheritance of most traits, and therefore cannot hope for the success of selection in first generations. The role of additive gene effect was greater than the dominance one for plant height, peduncle length and awn length, indicating usefulness of using recurrent selection to aggregate these genes followed by selecting lines with favorable agronomic characteristics. The model of genetic control for most of the traits was similar under both conditions in terms of the presence or absence of non-allelic interactions and it has not been widely affected by drought stress. The broad-sense heritability for plant height, peduncle length and awn length was estimated to be high under both conditions. The broad-sense heritability for kernel yield was moderate estimated under both conditions, but the narrow-sense heritability was very low. In general, considering the greater role of the non-additive gene effect for most of the traits, the selection is suggested in advanced generations and after access to a high level of gene fixation.
Behnaz Seifolahpour, Sohbat Bahraminejad, Kianoosh Cheghamirza, Shahryar Sasani,
Volume 11, Issue 1 (9-2024)
Abstract
Wheat is regarded as one of the most important cereal crops and a fundamental food staple worldwide. Bread is the primary and the main product of wheat, and its optimal quality is crucial for enhancing taste, extending shelf life, and reducing waste. In this study, some genetic parameters associated with the grain quality characteristics of 131 F6 lines resulting from the cross of Marvdasht × Nurstar cultivars (along with parents) were evaluated by measuring traits including grain protein content, moisture, starch, neutral detergent fibers (NDF), falling number, total gluten, strong gluten, weak gluten and dry gluten. The results of this study showed that the lines had highly significant differences only for grain protein content and Falling number. Results indicated that some lines had higher values than parents for important traits such as grain protein content. The results of the cluster analysis confirmed the diversity between the lines. Group five with 31 lines showed the highest mean for grain protein content. Protein content showed a significantly positive correlation with gluten-related traits. The lowest and highest values of phenotypic, genetic, and environmental variation coefficients were obtained for starch percentage and falling's number, respectively. The significant difference between the coefficient of genetic and phenotypic changes in traits such as grain starch and gluten indicate the greater influence of the environment on the traits. Protein and falling numbers had high heritability and genetic advancement. According to the results of this study, due to their high diversity and minimal environmental influence, the grain protein content and falling number traits can be used as selection criteria for superior lines (28, 35, 81, and 100).
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