Download or read book Inheritance of Yield Its Components and Morpho physiological Traits in Wheat Triticum Aestivum L Em Thell Under Heat Stress Conditions written by Ravinder Singh Sudan and published by . This book was released on 2004 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Breaking the myth Breeding for stress tolerance grain yield and quality traits simultaneously by diversifying the narrow genetic base written by Karansher Singh Sandhu and published by Frontiers Media SA. This book was released on 2023-07-20 with total page 657 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Heat Stress in Wheat written by Amir Mohamed Hussein Ibrahim and published by . This book was released on 1994 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heat stress sets an upper limit to maximizing wheat yields in many irrigated, low-altitude, tropical environments. Terminal heat stress also reduces wheat yields in certain Mediterranean environments in West Asia and North Africa. A study was carried out at three different environments in Sudan and Syria to identify potential selection traits and environments for breeding purposes. Seventeen morphological, physiological, and phenological traits were used to evaluate 16 diverse bread wheat genotypes under early, terminal, and continuous heat stress conditions. A plastic house experiment was also conducted to characterize the 16 genotypes for their response to photoperiod and vernalization. Early flowering/maturity, longer peduncles, larger number of kernels/spike, larger harvest index, and larger biomass played an important role under early and terminal heat stress conditions in Northern Syria. Medium flowering/maturity, semi-dwarf stature, denser ground cover, and larger biomass conferred better agronomic performance under continuous heat stress conditions in Wad Medani, Sudan. Unlike grain and biological yields, days to f lag leaf emergence, anthesis, and maturity showed stability across the three environments. Harvest index showed some stability across environments as well. None of the 16 genotypes was sensitive to day length. The late-maturing genotypes were sensitive to vernalization. A large amount of genetic variability was found for all the traits tested in all three environments to guarantee their use in a breeding program for heat stress.
Download or read book Genetic Studies on Yield Yield components and Some Morpho physiological Traits in Relation to Moisture stress Tolerance in Wheat Triticum Aestivum L written by M.S. Islam and published by . This book was released on 1997 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multiple abiotic stresses Molecular physiological and genetic responses and adaptations in cereals written by Sindhu Sareen and published by Frontiers Media SA. This book was released on 2023-04-05 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on Variability and Inheritance of Some Morpho physiological Traits in Bread Wheat Triticum Aestivum L Under Moisture Stress Condition written by K. A. Narayan and published by . This book was released on 2002 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetics of Morpho physiological Characters and Grain Yield in Wheat Triticum Aestivum L em Thell written by Rajesh Kumar Yadav and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book M nagerie en libert written by and published by . This book was released on 1910 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Variability and Association Among Morpho Physiological Traits Associated with Heat Tolerance in Bread Wheat Triticum Aestivum L With CD Copy written by Anzer UL Islam and published by . This book was released on 2016 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook of Photosynthesis written by Mohammad Pessarakli and published by CRC Press. This book was released on 2018-09-03 with total page 846 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of the previous editions of the Handbook of Photosynthesis, many new ideas on photosynthesis have emerged in the past decade that have drawn the attention of experts and researchers on the subject as well as interest from individuals in other disciplines. Updated to include 37 original chapters and making extensive revisions to the chapters that have been retained, 90% of the material in this edition is entirely new. With contributions from over 100 authors from around the globe, this book covers the most recent important research findings. It details all photosynthetic factors and processes under normal and stressful conditions, explores the relationship between photosynthesis and other plant physiological processes, and relates photosynthesis to plant production and crop yields. The third edition also presents an extensive new section on the molecular aspects of photosynthesis, focusing on photosystems, photosynthetic enzymes, and genes. New chapters on photosynthesis in lower and monocellular plants as well as in higher plants are included in this section. The book also addresses growing concerns about excessive levels and high accumulation rates of carbon dioxide due to industrialization. It considers plant species with the most efficient photosynthetic pathways that can help improve the balance of oxygen and carbon dioxide in the atmosphere. Completely overhauled from its bestselling predecessors, the Handbook of Photosynthesis, Third Edition provides a nearly entirely new source on the subject that is both comprehensive and timely. It continues to fill the need for an authoritative and exhaustive resource by assembling a global team of experts to provide thorough coverage of the subject while focusing on finding solutions to relevant contemporary issues related to the field.
Download or read book Accelerating Genetic Gain for Key Traits Using Genome Wide Association Studies and Genomic Selection Promising Breeding Tools for Sustainable Agriculture written by Sundeep Kumar and published by Frontiers Media SA. This book was released on 2024-01-08 with total page 149 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1994 with total page 1014 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nature of Inheritance and Association of Time Duration and Rate of Grain Filling and Subsequent Grain Yield in Crosses of Winter and Spring Wheats Triticum Aestivum L Em Thell written by Byung Han Choi and published by . This book was released on 1983 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: The nature of inheritance and possible associations for traits influencing earliness and grain yield were investigated using a four parent diallel of winter and spring wheat cultivars. More genetic variability was observed for the traits measured in segregating populations resulting from crosses between winter and spring type wheats in contrast to spring x spring or winter x winter crosses. The one exception was plant height where more genetic variability resulted from spring x spring crosses. Narrow sense heritability estimates were high for time and duration of heading, anthesis, grain filling and physiological maturity and for plant height. Smaller values were noted for rate of grain filling, kernel number, harvest index, tiller number, kernel weight, whole plant dry weight and grain yield. Estimates of the coefficient of heritability and the parent-offspring correlation coefficient were similar in magnitude except for the traits grain yield, tiller number, kernel weight and whole plant dry weight where large variations due to the environment were encountered. Using the Jinks-Hayman model, no maternal effects were noted nor were any nonallelic interactions observed for total duration of grain filling and lag period. The actual grain filling period was influenced to some degree by such interactions. The spring cultivars also appeared to have more dominant genes for longer total duration of grain filling and lag period. In contrast the winter parents had more dominant genes for the longer actual grain filling period. Estimates of general and specific combining ability provided similar evidence in terms of the nature of gene action. Both additive and nonadditive gene action was present for all traits, the relative magnitudes depending on the specific trait. Based on individual combining ability effects, the winter x spring cross Yamhill x Siete Cerros would appear to provide the highest proportion of desired segregates when combining earliness and acceptable grain yield. From the direct and indirect associations of grain yield, it would appear that a shorter duration of grain filling along with a shorter lag period from heading to anthesis are important for higher rates of grain filling if negative associations between earliness and grain yield are to be avoided.
Download or read book Inheritance and Association of Earliness and Grain Yield in Four Winter X Spring Wheat Crosses Triticum Aestivum L Em Thell written by Ahmet Ertug Firat and published by . This book was released on 1977 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parental and segregating populations derived from four winter x spring wheat crosses were investigated to obtain information concerning the inheritance and association of earliness, grain yield and yieldrelated traits. Feasibility of selecting in early generations for these characteristics was also evaluated. Four winter wheat cultivars (Hyslop, Yamhill, Bezostaia 1, and Sprague) and one spring wheat cultivar (Inia 66) were chosen on the basis of their relative maturity and contrasting agronomic characteristics. Parents, F1 s, F2' s, and reciprocal backcrosses to both parents were planted in the fall in a space-planted randomized complete block design. The two environmentally diverse locations selected were the Hyslop Agronomy Farm, Corvallis, Oregon (1000 mm of rainfall) and Sherman Experimental Station, Moro, Oregon (250 mm of rainfall). The effectiveness of early generation selection for the measured characteristics was evaluated by growing F3 lines identified as the earliest 1% and the highest yielding 1% of F2 individuals in each cross. These were grown along with the parents, F1s, BC1 s, BC2 s and F2' s under space-planted conditions at Hyslop Agronomy Farm. A study with the same populations was conducted by vernalizing and planting in the spring to gain further information on earliness. Analyses of variance were conducted for all characteristics measured. Frequency distributions for days to heading of F1, F2, backcross generations and parents were examined. From the data collected, estimates of F 1 -midparent deviations, degree of dominance, heritability in the narrow sense and genetic advance under selection were determined for each cross. The data were further analyzed by parent-progeny regression, correlation and path-coefficient analyses, polynomial and multiple regressions. Partially dominant major genes, varying in number between one to five depending on the particular cross, appeared to influence heading date. Modifying factors also seemed to affect the date of heading. The gene action involved in the inheritance of earliness was primarily additive indicating that selection for earliness would be effective as early as the F2 generation under both high and low rainfall conditions. Estimates of additive and nonadditive gene action suggested both were equally important in determining the yield components. Higher heritability estimates for the components of yield indicated that there was more genetic variability associated with the yield components than yield per se. Occurrence of additive genetic variation by location interaction implied that selection should be practiced simultaneously under different environments if wide adaptability of potential lines is desired. Since pronounced additive effect by year interactions occurred for the yield components, delayed selection for these traits may not be productive. Positive correlations were obtained between yield and the number of days to heading when all generations were combined. However, in the F2 generations, it appeared possible to select for the desired earliness with high yields as indicated by the low association between these two traits. The path-coefficient analyses suggested that tiller number had the highest direct effect on grain yield. However, because of a negative association between tiller number and kernel weight, selection pressures would have to be balanced between these two components. In most cases, linear relationships existed between grain yield and seven measured traits, respectively. The result of regression analyses also showed that grain yield may be described best as a linear function of its components.
Download or read book Genetics of Physiological Traits and Their Relationship with Productivity in Wheat Triticum Aestivum L Em Thell written by K. V. Prabhu and published by . This book was released on 1982 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Ecophysiology and Adaptation under Climate Change Mechanisms and Perspectives I written by Mirza Hasanuzzaman and published by Springer Nature. This book was released on 2020-06-01 with total page 865 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the state-of-the-art in plant ecophysiology. With a particular focus on adaptation to a changing environment, it discusses ecophysiology and adaptive mechanisms of plants under climate change. Over the centuries, the incidence of various abiotic stresses such as salinity, drought, extreme temperatures, atmospheric pollution, metal toxicity due to climate change have regularly affected plants and, and some estimates suggest that environmental stresses may reduce the crop yield by up to 70%. This in turn adversely affects the food security. As sessile organisms, plants are frequently exposed to various environmental adversities. As such, both plant physiology and plant ecophysiology begin with the study of responses to the environment. Provides essential insights, this book can be used for courses such as Plant Physiology, Environmental Science, Crop Production and Agricultural Botany. Volume 1 provides up-to-date information on the impact of climate change on plants, the general consequences and plant responses to various environmental stresses.
Download or read book Quantitative Trait Loci QTL Analysis of Yield Components and Heat Tolerance in Wheat Triticum Aestivum written by Jung Hwa Do and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was conducted to identify and map QTLs for yield components and heat tolerance of wheat in response to two kinds of heat treatment (short term-and long term-heat treatment) during seed formation in a set of 62 RILs derived from a cross of '7C' (heat resistant variety) and 'Seri M82' (heat susceptible variety) in environmentally controlled growth rooms and field. Phenotypic variations of yield components (kernel number, kernel weight, spike number and grain filling duration) were evaluated as indicators of heat tolerance / susceptibility. Most of the phenotypic variations of yield components exhibited a normally distributed pattern in response to heat stress treatments. This suggests that the yield component responses to high temperature stress are likely quantitatively inherited. A transgressive segregation pattern compared to the two parents was observed in several yield traits. This suggests that genetic variation from optimal recombination from the two parents have occurred in the progeny population. The Pearson correlation coefficients revealed significant correlations between yield components. This suggests the probability of co-segregation of genes controlling each yield components. The ANOVA also revealed a significant genotype x environment effect on individual yield components in response to reproductive stage high temperature stress. The heritability of the individual yield components was low (0.42 to 25%, 0.1~ 2% for heat tolerance). One hundred two polymorphic SSRs markers among 323 SSRs markers tested were used to construct a linkage coverage and average interval distance of 1860.2 cM and 18.2 cM/marker, respectively. Eighty-one QTLs for yield components and 68 QTLs for heat tolerance were detected with high LOD values (2.50~8.35 for yield components, 2.51~ 9.37 for heat tolerance) and that explained significant phenotypic variations (7~40% for individual QTL for yield components, 2~40 % for individual heat tolerance QTLs) from seven individual environments and the four individual heat stress environments, respectively. Specifically the regions between wmc48 and wmc89, and between wmc622 and wmc332 on the chromosome 4A and 6A, respectively possessed QTLs for both yield components and heat tolerance from various environments.
