Estimation of Genetic Components and Inheritance of Bread Wheat Agronomic Traits Using Regression Method Through Generation Mean Analysis

Authors

Abstract:

Studying the genetic structure of crops, including wheat, has always been one of the research priorities to increase the efficiency of breeding methods. In order to genetic analysis of some agronomic traits of bread wheat using generation mean analysis (GMA), all produced generations along with relevant parents of the two populations (Marvdasht × Rasoul and Marvdasht × Shahpasand) were evaluated in a randomized complete block design with three replicates under normal and terminal drought stress conditions in Razi University during 2015-2016 cropping season. Weighted analysis of variance showed the significant differences among generations for the most of the traits in two conditions. The results of GMA revealed that although the mode of inheritance differed in the crosses for the most of the traits, but additive, dominance gene effects and different types of epistasis had the roles in the heritability of the most traits. Among these gene effects, the role of dominance gene effect was higher and therefore, selection should be delayed to later generations. However, the role of fixable gene effects in the heritability of the traits such as stem diameter, awn length and number of spikelets per spike (both crosses), plant height and peduncle length (Marvdasht × Shahpasand), was almost equal or more than dominance gene effect indicating the usefulness of selection in early generations for these traits. The broad-sense heritability for kernel yield was estimated as nearly moderate for both crosses under both conditions, but the narrow-sense heritability was low under both conditions. Results of analysis of variance obtained from regression method showed that fixable-gene effects had higher relative contribution of generation sum of squares for most of the traits than non fixable-gene effects at both crosses under both conditions. The model of genetic control for the most of the traits was similar under both conditions for both crosses and it has not been widely affected by drought stress.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

Genetic analysis of agronomic and physiological traits of bread wheat (Triticum aestivum L.) using generation mean analysis under drought stress conditions and spring planting in the cold climate

Study of heritability and gene action to improve agronomic and physiological traits, especially under drought stress conditions, are very important. The objectives of this study were to investigate heritability for important agronomic traits and some physiological characters in a cross between two spring wheat cultivars. The experiment was carried out using different generations (BC1, BC2, F3, ...

full text

Genetic Study of Grain Yield and its Components in Bread Wheat Using Generation Mean Analysis under Water Stress Condition

Abstract In order to study the inheritance of grain yield and its components in bread wheat, two cultivars, Karchyya(drought and salinity tolerant) and Gaspard (sensitive to drought and salinity stress) were crossed.Parents together with F1, F2, F3, BC1and BC2 generations were evaluated using a randomized complete block design with three replications in 2008-2009 growing season.Grain weight per...

full text

Genetic Analysis of Grain Yield and Yield Components in Bread Wheat using Hayman's Diallel Method

Extended Abstract Introduction and Objective: By progeny trial after a diallel crossing, the function of genes and inheritance of quantitative traits can be estimated. This increases the ability to select parental lines, to participate in crosses, and determines the management of generations in the segregating populations. Material and Methods: In order to understand the genetic structure of ...

full text

Path Analysis of Grain Yield and Yield Components and Some Agronomic Traits in Bread Wheat

JANMOHAMMADI MOHSEN, SABAGHNIA NASER, NOURAEIN MOJTABA. 2014. Path Analysis of Grain Yield and Yield Components and Some Agronomic Traits in Bread Wheat. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 62(5): 945–952. Development of new bread wheat cultivars needs effi cient tools to monitor trait association in a breeding program. This investigation was aimed to charact...

full text

evaluation of inheritance for some quantitative traits in bread wheat using generation mean analysis under water deficit condition

investigation of inheritance, mode of gene action and determination of effective breeding strategy for improvement of physiological and morpho-physiological traits specifically in drought stress conditions is very important. to determine the inheritance pattern and genetic parameters of quantitative characters in bread wheat (triticum aestivum), p1, p2, bc1, bc2, f1, f2 generations derived from...

full text

heritability study of important bread wheat agronomic traits under drought stress condition using generation mean analysis of roushan×kavir cross

due to cereal are affected by drought stress in their lifetime. in order to study gene action of bread wheat under drought stress condition, a generation mean analysis was performed using f1, f2 and f3 generations derived from roushan and kavir. generation mean analysis was performed based on joint scaling test. genetic parameters including additive effect (d), dominance effect (h), additive×ad...

full text

My Resources

Save resource for easier access later

Save to my library Already added to my library

{@ msg_add @}


Journal title

volume 12  issue 36

pages  101- 116

publication date 2020-12

By following a journal you will be notified via email when a new issue of this journal is published.

Keywords

No Keywords

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023