Parametric Analysis to Describe Genotype X Environment Interaction and Yield Stability in Winter Wheat PDF Download

Author: John Luscombe Purchase
Publisher:
ISBN:
Category : Analysis of variance
Languages : en
Pages : 166

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Author: Mark J. Larson
Publisher:
ISBN:
Category : Genotype-environment interaction
Languages : en
Pages : 312

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Extensive research has been devoted to evaluating potential genotype-environment interactions. However, plant breeders are still in need of a simple way to describe how genotypes respond to different locations and years. In an environmentally diverse state like Oregon, significant genotype-environment interactions do occur The resulting lack of association between actual and genotypic potential yield performance makes it difficult to select genotypically superior lines. This study was prompted to evaluate the extent of such an interaction and compare various yield stability models. A significant genotype-environment interaction encompassing lines, environments, and years was discovered for each individual year analyzed and for the combined analysis of 1992, 1994 and 1995, and 1989 through 1994. Most lines evaluated during 1992, 1994 and 1995 were adapted to low yielding environments. However, two genotypes (OR880172 and OR880525) exhibited broad adaptation. Stephens and Mac Vicar were less adapted to the relatively high yielding Chambers site than the other genotypes tested during 1992, 1994 and 1995 due to Septoria tritici infections. The most stable genotypes during the combined 1992, 1994 and 1995 and 1989-1994 seasons were OR870831, Madsen and OR8500933H. Gene was the most desirable genotype based on stability and yield for both the combined 1992, 1994 and 1995 and 1989-1994 seasons. Due to an inability to adapt to higher yielding environments, the cultivar Rohde was the least stable genotype during the same combined periods. High and low temperatures and precipitation had minor yet significant effects on yield responses at all three sites during various periods identified. Advanced winter wheat selections and cultivars were grown in three diverse environments and compared over different time periods. Due to trial design and the objective of identifying superior genotypes from a set tested in target environments a combination of two methods, stability variance and a selection index, emerged as the most appropriate techniques. These approaches are considered the most appropriate because they use the mean of the trial as a gauge for measuring stability.

Author: Weikai Yan
Publisher: CRC Press
ISBN: 1420040375
Category : Mathematics
Languages : en
Pages : 287

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Research data is expensive and precious, yet it is seldom fully utilized due to our ability of comprehension. Graphical display is desirable, if not absolutely necessary, for fully understanding large data sets with complex interconnectedness and interactions. The newly developed GGE biplot methodology is a superior approach to the graphical analys

Author: Muluken Bayable Tadege
Publisher: LAP Lambert Academic Publishing
ISBN: 9783847311546
Category :
Languages : en
Pages : 84

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Stable genotype would not contribute much variation to the variance in productivity over a region. In practice, however, genotypes do usually interact with their environment and show wide variations in stability. Since crop productivity is usually subject to risk, breeders have to exploit the opportunity of genotype by environment interaction which describes how well each genotype will respond to different growing conditions. To analyze such interactions, a number of parametric and nonparametric statistical methods have been developed by different researchers. However, considerable debates of opinion still exist between the leading protagonists of the different statistical methods in identifying the best and most suitable procedure to be used for a specific data set or production environment. This Thesis work, therefore, provides information about the relationship among the various statistical methods. I hope this work will help plant breeders in judging which method will explain best for a specific data set and whether a genotype is widely or specifically adapted.

Author: Mark Cooper
Publisher: IRRI
ISBN: 0851991084
Category : Business & Economics
Languages : en
Pages : 650

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An overview of crop improvement; Analysis of genotype by environment interactions; Interpretation of genotype by environment interactions; Integrated approaches to plant improvement; Synthesis of strategies for crop improvement.

Author: Manjit S. Kang
Publisher: CRC-Press
ISBN: 9780849340031
Category : Science
Languages : en
Pages : 416

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Genotype-by-Environment Interaction (GEI) is a prevalent issue among crop farmers, plant breeders, geneticists, and production agronomists. This book brings together contributions from expert plant breeders and quantitative geneticists to better understand the relationship between crop performance and environment. This information can reduce the cost of extensive genotype evaluation by eliminating unnecessary testing sites and by fine-tuning breeding programs. Molecular aspects of GEI are discussed for the first time and key bibliographical references on GEI are included in an appendix.

Author: Samuel Philip Hazen
Publisher:
ISBN:
Category : Genotype-environment interaction
Languages : en
Pages : 216

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Author: National Research Council
Publisher: National Academies Press
ISBN: 0309164540
Category : Technology & Engineering
Languages : en
Pages : 378

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This report is the second in a series of three evaluating underexploited African plant resources that could help broaden and secure Africa's food supply. The volume describes the characteristics of 18 little-known indigenous African vegetables (including tubers and legumes) that have potential as food- and cash-crops but are typically overlooked by scientists and policymakers and in the world at large. The book assesses the potential of each vegetable to help overcome malnutrition, boost food security, foster rural development, and create sustainable landcare in Africa. Each species is described in a separate chapter, based on information gathered from and verified by a pool of experts throughout the world. Volume I describes African grains and Volume III African fruits.

Author: Hassan Awaad
Publisher: Springer Nature
ISBN: 3030643239
Category : Science
Languages : en
Pages : 589

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This book focuses on the soil and environmental resources and how to utilize them under Egyptian conditions to achieve tolerance to environmental abiotic stresses, i.e., drought, heat, salt, pollutants, and biotic stresses such as disease resistance. Further, it explores ways to increase productivity, improve the quality of field crops, and reduce the food gap. The application of modern technologies is an essential mechanism for improving crops' productivity through laser, seed technology, mycorrhiza, and biotechnology to enhance the yield of genotypes in sustainable farming systems. Therefore, this book discusses fundamental ways to increase productivity under various environmental circumstances. The book reflects the enormous potential held by horizontal expansion in the newly reclaimed lands in Egypt. Tapping that potential depends on developing crops that are highly tolerant to environmental stresses and mitigating the impacts of climate changes around the world to help Egypt and countries with similar weather and water deficits achieve the 2030 sustainability agenda for agriculture. Given its profundity and scope, the book offers a valuable asset for stakeholders, policy planners, decision-makers, researchers, and scientists in Egypt and worldwide.

Author: Paul Norman Fox
Publisher:
ISBN:
Category : Genotype-environment interaction
Languages : en
Pages : 154

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