Genetic Studies On Morpho Physiological Characters Influencing Biomass Harvest Index And Yield In Rice Oryza Sativa L
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Genetic Studies On Morpho Physiological Characters Influencing Biomass Harvest Index And Yield In Rice Oryza Sativa L
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Author : A. K. Singh
language : en
Publisher:
Release Date : 1991
Genetic Studies On Morpho Physiological Characters Influencing Biomass Harvest Index And Yield In Rice Oryza Sativa L written by A. K. Singh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
The Indian Journal Of Genetics Plant Breeding
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Author :
language : en
Publisher:
Release Date : 1941
The Indian Journal Of Genetics Plant Breeding written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1941 with Genetics categories.
Genetic Studies On Morpho Physiological Characters Of High Yielding Short Duration Rice Varieties Oryza Sativa L
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Author : V. R. Pham
language : en
Publisher:
Release Date : 1991
Genetic Studies On Morpho Physiological Characters Of High Yielding Short Duration Rice Varieties Oryza Sativa L written by V. R. Pham and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
Genetic And Molecular Analysis Of Yield And Physiological Traits In Three Line Hybrids In Rice Oryza Sativa L Under Aerobic Condition
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Author : Sathya Ramalingam
language : en
Publisher: GRIN Verlag
Release Date : 2012-11-27
Genetic And Molecular Analysis Of Yield And Physiological Traits In Three Line Hybrids In Rice Oryza Sativa L Under Aerobic Condition written by Sathya Ramalingam and has been published by GRIN Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-27 with Science categories.
Doctoral Thesis / Dissertation from the year 2012 in the subject Biology - Genetics / Gene Technology, Tamil Nadu Agricultural University (Madurai Agricultural College and Research Institute), course: Ph.D, language: English, abstract: An investigation in rice (Oryza sativa L.) was carried out subjecting six ‘lines’ and 15 ‘testers’ crossed in a Line x Tester mating design to estimate gene action, combining ability and heterosis for yield and drought tolerant traits under aerobic condition. The 21 parents were also surveyed using SSR markers. From the Line x Tester analysis, the hybrids exhibited significant variation among themselves for all the characters studied under aerobic condition. The study of gene action for drought tolerance and yield component traits revealed that all the traits exhibited dominant gene action which was predominant. Therefore, to harness the dominant gene effects, either heterosis breeding or selection at later generations would be an appropriate breeding methodology. Based on the per se performance of lines and testers, the following parents i.e., IR79128A (L1), IR79156A (L2), COMS14A (L5), COMS24A (L6), IR 80286-22-3-6-1R (T3) and IR7925A-428-2-1-1R (T4) were adjudged as the best parents and crosses involving them would be expected to throw desirable segregants for both yield and drought tolerant traits under aerobic condition. Based on the gca effects, the parents IR79128A (L1), IR70369A (L4), IR79156A (L2), BI-33 (T15), IR79582-21-2-2-1R (T5), KMP-105 (T11), T1 (IR 69726-29-1-2-2R) and MAS - 946-1 (T9) were the best general combiners and the crosses involving them would result in the identification of superior segregants with favourable genes for both drought and yield. Out of 21 parents evaluated based on per se and gca effects, three ‘lines’ viz., IR79128A (L1), IR79156A (L2) and IR70369A (L4) and three ‘testers’ viz., IR7925A-428-2-1-1R (T11), KMP -148 (T12) and BI-33 (T15) were identified as the best genotypes which will be utilized in further breeding programmes as parents for improvement of yield and drought tolerance under aerobic conditions. The cross combination IR70369A / MAS -26 (L4 x T10) was identified as the best for recombination breeding to get desirable segregants for yield and drought tolerant traits under aerobic conditions. The cross combinations viz., IR70369A / IR 7925A-428-2-1-1R (L4 x T4) and IR70369A / KMP-105 (L4 x T11) had high per se, sca effects and standard heterosis for drought tolerant and yield traits under aerobic conditions.
Morpho Physiological Yield And Genetic Characterization Of Indica Rice Oryza Sativa L Genotypes For Salinity And Drought Tolerance
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Author : Naqeebullah Naqeebullah
language : en
Publisher:
Release Date : 2019
Morpho Physiological Yield And Genetic Characterization Of Indica Rice Oryza Sativa L Genotypes For Salinity And Drought Tolerance written by Naqeebullah Naqeebullah and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with categories.
The occurrence of phenotypic and genotypic diversity is the key factor in crop improvement including abiotic stress tolerance. The focal objectives of this study were to evaluate and characterize 74 tropical indica rice breeding lines for phenotypic and genotypic diversity, screening for the most devastating abiotic stresses in rice; drought and salinity at the seedling stage at morpho-physiological and molecular levels. To fulfill these objectives, five studies were conducted in pots; first two experiments aimed at assessing phenotypic and yield variability at seedling and maturity stages respectively; based on several (more than 20) root and shoot traits which exploited a wide range of variability among genotypes for measured traits. Germplasm was then screened for drought stress at two moister regimes, 50%, and 100% moisture levels, under mini-hoop structures. Nine percent of the genotypes exhibited a high tolerance to drought stress, and genotypes IR86638 and IR49830 were identified as the most and least drought tolerant respectively. Germplasm was also screened for salinity tolerance in pure sand pot-culture (a simple, efficient and alternate screening method) at three levels; high salt stress (EC 12 dSm-1), moderate salt stress (EC 6 dSm-1), and control imposed one week after emergence. Thirteen genotypes (17.57%) were identified as highly salt tolerant; genotypes FED 473 and IR85427 were highly salt tolerant and salt sensitive, respectively. Root traits were found more crucial and best descriptors in identifying both salinity and drought tolerant genotypes. Genotypes were further used in Genome-wide Association Study (GWAS) to uncover important SNPs, QTLs or genes related to salinity tolerance. A higher number of significant SNPs were discovered for root traits, indicting the importance of root traits in identifying abiotic stress tolerance in rice. The knowledge gained from this investigation could be useful in breeding for better crop establishment, yield improvement, screening for any abiotic stress tolerance.
Indian Science Abstracts
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Author :
language : en
Publisher:
Release Date : 2005
Indian Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Science categories.
Rice Improvement
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Author : Jauhar Ali
language : en
Publisher: Springer Nature
Release Date : 2021-05-05
Rice Improvement written by Jauhar Ali and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-05-05 with Technology & Engineering categories.
This book is open access under a CC BY 4.0 license. By 2050, human population is expected to reach 9.7 billion. The demand for increased food production needs to be met from ever reducing resources of land, water and other environmental constraints. Rice remains the staple food source for a majority of the global populations, but especially in Asia where ninety percent of rice is grown and consumed. Climate change continues to impose abiotic and biotic stresses that curtail rice quality and yields. Researchers have been challenged to provide innovative solutions to maintain, or even increase, rice production. Amongst them, the ‘green super rice’ breeding strategy has been successful for leading the development and release of multiple abiotic and biotic stress tolerant rice varieties. Recent advances in plant molecular biology and biotechnologies have led to the identification of stress responsive genes and signaling pathways, which open up new paradigms to augment rice productivity. Accordingly, transcription factors, protein kinases and enzymes for generating protective metabolites and proteins all contribute to an intricate network of events that guard and maintain cellular integrity. In addition, various quantitative trait loci associated with elevated stress tolerance have been cloned, resulting in the detection of novel genes for biotic and abiotic stress resistance. Mechanistic understanding of the genetic basis of traits, such as N and P use, is allowing rice researchers to engineer nutrient-efficient rice varieties, which would result in higher yields with lower inputs. Likewise, the research in micronutrients biosynthesis opens doors to genetic engineering of metabolic pathways to enhance micronutrients production. With third generation sequencing techniques on the horizon, exciting progress can be expected to vastly improve molecular markers for gene-trait associations forecast with increasing accuracy. This book emphasizes on the areas of rice science that attempt to overcome the foremost limitations in rice production. Our intention is to highlight research advances in the fields of physiology, molecular breeding and genetics, with a special focus on increasing productivity, improving biotic and abiotic stress tolerance and nutritional quality of rice.
Agrindex
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Author :
language : en
Publisher:
Release Date : 1995
Agrindex written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Agriculture categories.
Water Wise Rice Production
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Author : B. A. M. Bouman
language : en
Publisher: Int. Rice Res. Inst.
Release Date : 2002
Water Wise Rice Production written by B. A. M. Bouman and has been published by Int. Rice Res. Inst. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Rice categories.
The Ecophysiology Of Plant Phosphorus Interactions
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Author : Philip J. White
language : en
Publisher: Springer Science & Business Media
Release Date : 2008-06-03
The Ecophysiology Of Plant Phosphorus Interactions written by Philip J. White and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-06-03 with Science categories.
Phosphorus (P) is an essential macronutrient for plant growth. It is as phosphate that plants take up P from the soil solution. Since little phosphate is available to plants in most soils, plants have evolved a range of mechanisms to acquire and use P efficiently – including the development of symbiotic relationships that help them access sources of phosphorus beyond the plant’s own range. At the same time, in agricultural systems, applications of inorganic phosphate fertilizers aimed at overcoming phosphate limitation are unsustainable and can cause pollution. This latest volume in Springer’s Plant Ecophysiology series takes an in-depth look at these diverse plant-phosphorus interactions in natural and agricultural environments, presenting a series of critical reviews on the current status of research. In particular, the book presents a wealth of information on the genetic and phenotypic variation in natural plant ecosystems adapted to low P availability, which could be of particular relevance to developing new crop varieties with enhanced abilities to grow under P-limiting conditions. The book provides a valuable reference material for graduates and research scientists working in the field of plant-phosphorus interactions, as well as for those working in plant breeding and sustainable agricultural development.