The Crop Physiological Basis of Yield Variation in Grain Sorghum Hybrids and Their Parents PDF Download
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Author: Vithanage Upali de Silva Jayasuriya
Publisher:
ISBN:
Category : Hybrid sorghum
Languages : en
Pages : 194
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Book Description
Author: Vithanage Upali de Silva Jayasuriya
Publisher:
ISBN:
Category : Hybrid sorghum
Languages : en
Pages : 194
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Book Description
Author: Akihiko Kamoshita
Publisher:
ISBN:
Category : Plants
Languages : en
Pages : 238
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Book Description
Author: Paula Andrea Demarco
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Understanding physiological changes in response to long-term selection for yield can inform breeding decisions and hasten genetic gain. This dissertation is organized into four chapters: Chapter 1, Introduction, Chapter 2, presents yield gain achieved for US sorghum hybrids and their components (grain number and grain weight), Chapter 3 focuses on nutrient use efficiency, specifically on nitrogen (N) internal efficiency (NIE, yield to N uptake ratio), and Chapter 4, Conclusions. For Chapters 2 and 3, field trials were conducted during the 2018 and 2019 seasons in eight site-years across the states of Kansas and Texas (US) including 20 commercially available grain sorghum hybrids released by Pioneer between 1963 and 2017. Consistent with estimates using historical yield data, sorghum yield improvement was 27 kg ha−1 yr−1. Grain number increased at a rate of 100 grains m−2 yr−1, and modern hybrids had larger panicle size with greater accumulation of WSC during the vegetative period (until flowering). Additionally, greater remobilization of WSC during the reproductive period (after flowering) to grain was captured, thus, maintaining grain size on the increased grain number per unit area and harvest index (Chapter 2). The N internal efficiency (NIE, yield to N uptake ratio) increased at the expense of a reduction in grain N concentration and, in minor proportion, due to an increase in the N harvest index (NHI) at maturity for newer relative to older hybrids. Newer genotypes evidenced greater N remobilization from the stover to the grains during the reproductive period (Chapter 3). This study demonstrates the physiological foundations for yield enhancement and the N and C utilization behind yield genetic gain for sorghum hybrids. Future yield gains in sorghum can be pursued by enhancing N uptake to sustain further genetic progress.
Author: ASHVATHAMA V. H
Publisher:
ISBN:
Category :
Languages : en
Pages : 144
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Author: V. B. Ogunlela
Publisher:
ISBN:
Category :
Languages : en
Pages : 203
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Book Description
Two greenhouse and three field experiment were conducted to study the effects of elevated night temperatures on the yield and growth of a grain sorghum (Sorghum bicolor (L.) Moench) hybrid. The genotype used in these investigations was the 'RS 671' (Redlan x Tx 415), an open-pedigree temperate-adapted grain sorghum. The phenological growth phase during which temperature treatments were imposed was the panicle development (GS-2) period. Experiment I, II (greenhouse) and III (field) were designed to determine the response of grain sorghum to two elevated night temperatures and the growth stage during GS-2 period when the plant is most sensitive to elevated temperatures. Experiment IV and V (field) were conducted with the same objectives as those for Experiment I, II and III and also to determine the effects of artificial preconditioning on the plant's response to elevated night temperatures. Experiments I - Plants were exposed to 26.5 and 32 C night temperatures at 4-day durations commencing from florest differentiation through bloom. The two elevated night temperatures caused significant reduction in grain yield and yield components except seed size that was enhanced (12%) by the 32 C treatment. Approximately 19%, 21%, 24% and 20% reductions in panicle dry weight, grain yield per plant, number of seeds per panicle and grams of grain/GS-3 day/plant, respectively, were caused by the 32 C treatment. The 26,5 C treatment also caused reduction in these variables but to much lesser degrees. Numbers of days to (...).
Author: Ignacio A. Ciampitti
Publisher: John Wiley & Sons
ISBN: 0891186271
Category : Technology & Engineering
Languages : en
Pages : 528
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Book Description
Sorghum is among the top five cereals and one of the key crops in global food security efforts. Sorghum is a resilient crop under high-stress environments, ensuring productivity and access to food when other crops fail. Scientists see the potential of sorghum as a main staple food in a future challenged by climate change. The contributors provide a comprehensive review of sorghum knowledge. The discussion covers genetic improvements, development of new hybrids, biotechnology, and physiological modifications. Production topics include water and nutrient management, rotations, and pest control. Final end uses, sorghum as a bioenergy crop, markets, and the future of sorghum are presented. IN PRESS! This book is being published according to the “Just Published” model, with more chapters to be published online as they are completed.
Author: John G. Scandalios
Publisher: Academic Press
ISBN: 148327022X
Category : Science
Languages : en
Pages : 293
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Book Description
Physiological Genetics is a compilation of developments, contributed by experts in the field of physiological genetics. The articles contained in the book covers various accounts of developments in the field. The book starts with an introductory chapter describing genetic factors in developmental gene regulation, followed by discussions on enzyme differentiation, hormonal control of gene expression, biochemical genetics of morphogenesis, cytoplasmic male sterility in maize, plant somatic cell genetics, and the population dynamics of genetic polymorphism. Physiologists, biologists, geneticists, and students will find a valuable reference material.
Author: Y.P. Abrol
Publisher: Springer Science & Business Media
ISBN: 9401702896
Category : Science
Languages : en
Pages : 424
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Book Description
Sulphur (S) plays a pivotal role in various plant growth and development processes being a constituent of sulphur-containing amino acids, cysteine and methionine, and other metabolites viz., glutathione and phytochelatins, co-factor of enzymes which contribute to stress repair and amelioration of heavy metal toxicity. Besides, a number of S-containing components are biologically active and, thus, a source for use as medicinal value. The basic global issue before the agricultural scientist and world community is to evolve cultivars and develop methodologies for efficient use of inputs to enhance agricultural productivity. This is particularly true of the developing countries which are going to see maximum rise in population with changing food demands and declining availability of land. Amongst the inputs, nutrients play a crucial role. The major requirement is for N, P and K followed by several micro-nutrients. In this context reports of world-wide S deficiency in the agricultural systems are relevant. The reasons are many. Broadly speaking reduction inS emission, use of S-free N, P and K fertilizers and higher biomass production contributed the maximum. Despite the need for sulphur as an essential plant nutrient and the substantial returns expected from its use, very little attention has been given to fill the gap between supply and demand of S.
Author: K. R. Khanna
Publisher: CRC Press
ISBN: 9780849354182
Category : Technology & Engineering
Languages : en
Pages : 478
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Book Description
This book provides a comprehensive review at the biochemical and molecular level of the processes and techniques that contribute to crop improvement. General topics include a historical perspective of the advancements in crop improvement; cultivar systematics and biochemical and molecular markers in crop improvement programs; the genetics of physiological and biochemical processes affecting crop yield; the genetics of photosynthesis, chloroplast, relevant enzymes, and mutations; osmoregulation/adjustment and the production of protective compounds in relation to drought tolerance; and the biochemistry of disease resistance, including elicitors, defense response genes, their role in the production of phytoalexins and other strategies against pathogens. Other topics include quality breeding (e.g., molecular gene structure, changing individual amino acids, enhancing nutritive value of proteins) and biotechnology/genetic engineering. Geneticists, biochemists, botanists, agricultural specialists and others involved in crop improvement and breeding should consider this volume essential reading.
Author: E H Satorre
Publisher: CRC Press
ISBN: 9781560228745
Category : Technology & Engineering
Languages : en
Pages : 544
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Book Description
Discussing the latest processes involved in researching yield generation, Wheat: Ecology and Physiology of Yield Determination will help you design various types of crop production systems for maximum yield. Featuring information on developing high-yielding, low-input, and quality-oriented systems, this book offers you both physiological and ecological approaches that will help you understand the crop as well as increase its production. Discussing aspects of wheat growth for specific regions around the world, Wheat provides you with information that will improve the size and quality of your crops, including: how temperature, vernalization, and the photoperiod affect the development of wheat using the correct amount of nitrogen fertilizers for wheat crops an explanation of the reproduction and nitrogen cycles of wheat how elements and conditions such as lipids, proteins, nitrogen, and climate enhance grain quality estimating and determining optimal sowing dates examining factors that may affect wheat yield-density relationships, such as planting arrangement and date of sowing preventing seed decay and examining effects of mildews and leaf blights examining historical trends of the crop to see what further research needs to be done You'll also receive information on the genetic gains in wheat research that are improving the physiological traits and numerical components of this essential grain. Within Wheat, you'll find data and methods from international experts in the field that will improve the yield and growth of the world's most important crop.
