Pdf generation mean analysis and heritabilities of. Genetic analysis for quantitative traits in bread wheat. Study of genetic control of salinity tolerance in bread. Generation mean analysis for yield, its components and quality characteristics in four crosses of egyptian cotton gossypium barbadense l. Estimation of some genetic parameters through generation mean analysis in two winter wheat crosses abstract backgroundandpurpose. Five wheat cultivars differing in their response to high mn were crossed in a half diallel design with no reciprocals. The basis for fundamental analysis is supply and demand.
Low temperature lt tolerance in wheat is a quantitative character that is regulated by a complex arrays of genes. Wheat is an important commodity crop and a vital component of a healthy global diet providing starch, dietary proteins, fiber, fats, vitamin b, zinc, calcium, and iron. Sabesan department of genetics and plant breeding, faculty of agriculture, annamalai university. The objective of the present study is to determine the mode of gene action and inheritance of cold. Material and methods the experimental material comprised of seven generation i. Generation mean analysis is a tool for designing the most appropriate breeding approaches to develop crop varieties with desired traits and is commonly used in studies on the inheritance of quantitative traits.
Generation means analysis indicating the presence of additive genetic affects that can be fixed in early segregating generations. Pdf references to evaluate the genetic background of quantitative criteria of drought tolerance in wheat, six generations of a cross between the varieties of plainsman and cappelle desprez were grown in a randomized complete block design with three replications in. Significant generation effect is a prerequisite to perform generation means analysis to study the inheritance of the targeted traits. Genetic study of grain yield and its components in bread. In both crosses a resistant spring wheat cultivar was crossed to a susceptible cultivar. The analysis of variance showed significant differences among generations. Generation mean analysis mather and jinks, 1982 provides information on the relative importance of average effects of the genes additive effects, dominance deviations and effects due to nonallelic genetic interactions in determining genotypic values of the individuals and consequently, mean genotypic values of families and generations. It estimates the gene actions that control quantitative traits, as well as the additive, dominance and epistatic effects. The p 1, p 2, f 1, f 2, bc 1 and bc 2 of these generations were studied for seven quantitative. Genomewide association analysis of agronomic traits in. Seedlings of parents and progeny generations were phenotyped in high mn nutrient solutions. Generation mean analysis to estimate genetic parameters for morphological traits in common bean phaseolus vulgaris l. Recombinant inbred lines derived from the cross of a local variety with a midge resistant variety and two local checks were evaluated during the 2015 rainy season across. Dominance effects were significant in four crosses.
Sorghum is the second most important cereal crop in niger. Abstract the six populations parents, f1, backcrosses and f2 of the two wheat crosses, gemmeiza 9 il1 c1 and sids 1 il2 c2 were grown under normal irrigation n and drought stress d at the farm of faculty of agriculture, sohag. Generation mean analysis for quantitative traits in sesame. Analysis of the recombination landscape of hexaploid bread. Generation mean analysis revealed the presence of dominance type of gene action observed in the cross ic328953 x gpm210 for all grain yield traits except for 100 grain weight g. Present study was made to get information about genetic heritability and genetic effects and gene action for different plant attributes in two wheat cross combinations. Generation mean analysis for turcicum leaf blight in ugandan sorghum 1. Generation mean analysis and heritabilities of resistance to septoria tritici in durum wheat article pdf available in phytopathology 7712 january 1987 with 115 reads how we measure reads.
Yield stability analysis of bread wheat lines using ammi model. For each of the populations, the number of cos per ril was recorded across the 21 chromosomes fig. Pdf generation mean analysis in wheat triticum aestivum. Research article generation mean analysis for yield and. Pdf genetic analysis of traits related to grain yield in wheat under. The crop is grown in a wide range of ecological environments in the country. Foliar symptom severity of seedlings artificially inoculated with s. Preponderant of dominant gene action in maize revealed by. Therefore, data of p1, p2, f1, f2 and backcross bc1 and bc2 populations were recorded for following plant traits. We present the first results from a novel multiparent advanced generation inter. Introduction to wheat a different species of wheat wheat triticum spp. The analysis of variance revealed significant differences among generations traits. Keywords generation mean analysis, genetic variability.
Generation mean analysis was performed using mather and jinks method. In view of this, the present investigation was carried out the objective of assessing the nature and magnitude of gene action for heavest index, grain yield and its components in sorghum through generation mean analysis. Generation mean analysis for turcicum leaf blight in. Fundamental analysis is a means of examining commodities in an attempt to predict the future path of least resistance for prices. Furthermore, generation mean analysis indicated that the presence of additive genetic effects could be fixed in early segregating generations ijaz et al.
Generation mean analysis using a, b, c and joint scaling tests indicated that additive. Reza bihamta3 1department of agriculture islamic azad university shahre rey branch, iran. The overall mean percent control of fhb index and don from 15 states u. Generation mean analysis for turcicum leaf blight in ugandan sorghum mayada m. Co frequencies show a relatively normal distribution independent of the analyzed population with outlier rils observed with high or low co frequencies in each population. Generation mean analysis for yield, its components and. Genetic analysis showed dominance in the inheritance of all studied characters under both water treatments in two crosses except by, rwc and cc under normal. Pdf the six populations parents, f1, backcrosses and f2 of the two wheat crosses, gemmeiza 9. Generation means analysis of wheat streak mosaic virus resistance in winter wheat frederick hakizimana1,2. Estimation of some genetic parameters through generation mean. This research is done based on the major factors that affect the production of wheat crop in the case of. Genetic analysis showed dominance in the inheritance of all studied characters under both water treatments in two crosses except by.
How does a grain of wheat address freedom and the kenyan struggle for independence. Its production and productivity in most parts of the world, especially in subsaharan africa, is constrained by drought and high temperature stresses 24. The threeparameter model mean, additive, and dominance effects was. Generation mean analysis in wheat triticum aestivum l. Genetic analysis of grain yield and its components in bread wheat triticum aestivum l. This section will also explain the specific vocabulary related to wheat that will be used on the other sections of this website. Generation mean analysis for grain yield and its related traits in. Generation means analysis indicated that additive, dominance, and epistatic effects were all involved in the inheritance of wsmv resistance.
Nasim akhshi 1, kianoosh cheghamirza 2,3, hadi ahmadi 1, farhad nazarian firouzabadi 1 1agronomy and plant breeding group, faculty of agriculture, lorestan university, khorramabad, iran. Generation mean analysis is a simple but useful technique for estimating these. The large size of this magic population 1579 progeny, its diverse genetic composition and high levels of recombination all contribute to its value as a genetic resource. Naghavi3 1 and 3 kerman agricultural and natural resources research and education center, agricultural research, education and. Genetic control of cold hardiness using generation mean analysis in bread wheat triticum aestivum l. Here we have used a firstgeneration wheat haplotype map created by targeted resequencing of lowcopy genomic regions in the reference panel of 62 lines to impute marker genotypes in a diverse panel of winter wheat cultivars from the u. Although several genetic studies have been conducted, there is not a general consensus on the mode of gene action. Generation mean analysis of grain quality traits in. The objectives of this study were to estimate gene effects and heritability for three important quantitative traits grain.
Hard red winter wheat has stayed important for so long because its traits and pattern of growth and development are best suited of all crops to the weather, soils, and other conditions in the state. Generation means analysis for five physiological traits of bread. Yield stability analysis of bread wheat lines using ammi model fatemeh bavandpori, jafar ahmadi and seyed mohssen hossaini department of crop production and breeding, imam khomeini international university, qazvin, iran. Generation means analysis of wheat streak mosaic virus. Generation mean analysis of spring wheat triticum aestivum l.
Statistical analysis of factors affecting wheat production. Assessment of salt tolerance inheritance in barley via. In this method the mean of each character is indicated as follows. Department of statistics, college of natural sciences, jimma uniiversity, jimma, ethiopia. Generation mean analysis in relation to polygenic systems. Genetic control of cold hardiness using generation mean. Reciprocal crosses were included in the analysis to determine if the cytoplasm contributed in any. Genotype imputation in winter wheat using firstgeneration. The interaction between high, intermediate and low molecular weight. However, sorghum grain yield in niger is limited by both abiotic and biotic constraints. Generation mean analysis of fruit quality traits in eggplant solanum melongena l. Barakat 1996 employed generation mean analysis in combination with an analysis of variation to study the inheritance of wheat characters related to immature embryo regeneration capacity. Genetic analysis using generation mean analysis is a tool for designing the most appropriate breeding approaches to developing varieties of rice. When looking at prices of a commodity, the concept of supply and demand amounts to a simple equation.
To study the nature and magnitude of gene effects for yield and its components in sesame sesamum indicum l. Statistical analysis of factors affecting wheat production a case study at walmara woreda. In relation to five crosses there was evidence of digenic epistasis. The results of scaling tests table 4 divulged the presence of non allelic interaction in crosses included in the experiment indicating the role of non allelic interactions for the expression of 100grain weight. Broadsense heritability estimates for visual symptom rating and elisa values were high for both crosses 0. Page 2 the protein fraction in wheat is crucial to the development of the gluten structure of dough and how well flour performs in processing. However, weather in kansas is less than ideal for wheat and, more than any other factor. Mean square deviations of the analysis of variance for nine physioagronomical traits in durum wheat cross.
Generation mean analysis is a simple but useful technique for estimating gene ef fects for a polygenic trait, its greatest merit lies in the ability to estimate epistatic gene effects such as ad ditive. Generation mean analysis to estimate genetic parameters. Generation means analysis for five physiological traits of. F1xp2 were raised and subjected to generation mean analysis for detecting the nature of gene effects responsible for inheritance of the number of grains, grainweight and single grain weight per spike of the longest culm. Analysis of variance and mean comparison of the characters were done using sas software. Generation mean analysis of fruit quality traits in. Estimates of generation mean analysis are presented in.
In order to study the inheritance and genetic analysis of drought tolerance indicators a six generations of p 1, p 2, f 1, f 2, bc 1 and bc 2 of two wheat crosses i. Cite this paper usman ijaz, smiullah, muhammad kashif. Estimation of some genetic parameters through generation mean analysis in three bread wheat crosses magda, e. Estimation of some genetic parameters through generation. In order to estimate additive and dominance components of genetic variance and detection of nonallelic interaction for the salt tolerance criteria in barley, 7 generations p 1, p 2, f 1, f 2, f 3, bc 1, bc 2 derived from the cross wiesel burgeraborxlokusbda and the check were used in a split plot design with two replications in hydroponic culture. Generation mean analysis provide basic information to determine the inheritance pattern of quantitative traits in f1 and later generations. Genetic analysis of grain yield and its components in. Generation mean analysis for grain yield attributing. Genetic control for some traits using generation mean. However, things get more complicated when you try to. Generation means analysis of physiological and agronomical. Analysis of generation means for some metric plant traits. Generation means analysis for five physiological traits of bread wheat under rainfed condition.
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