Agronomic Assessments of Genotypic Variation Among Stay-green and Senescent Sorghum Hybrids Under Different Rates of Nitrogen PDF Download
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Author: Sylvester Addy Publisher: ISBN: Category : Chlorophyll Languages : en Pages : 138
Book Description
Investigates the difference in the nitrogen (N) status between stay-green and senescent sorghum hybrids by assessing the genotypic variability for chlorophyll content and leaf senescence under three rates of N supply to determine the minimum supply required for the expression of the stay-green phenotype in the stay-green hybrid. Compares nitrogen use, uptake, and utilization efficiencies and examines grain yield and differences in dry matter and plant nitrogen content in plant parts at harvest.
Author: Sylvester Addy Publisher: ISBN: Category : Chlorophyll Languages : en Pages : 138
Book Description
Investigates the difference in the nitrogen (N) status between stay-green and senescent sorghum hybrids by assessing the genotypic variability for chlorophyll content and leaf senescence under three rates of N supply to determine the minimum supply required for the expression of the stay-green phenotype in the stay-green hybrid. Compares nitrogen use, uptake, and utilization efficiencies and examines grain yield and differences in dry matter and plant nitrogen content in plant parts at harvest.
Author: Jules Janick Publisher: John Wiley & Sons ISBN: 9780470593790 Category : Science Languages : en Pages : 432
Book Description
Plant Breeding Reviews presents state-of-the-art reviews on plant breeding and genetics covering horticultural, agronomic and forestry crops, incorporating both traditional and molecular methods. The contributions are authored by world authorities, anonymously reviewed, and edited by Professor Jules Janick of Purdue University, USA. The series is an indispensible resource for crop breeders, plant scientists, and teachers involved in crop improvement and genetic resources. Initiated in 1983, Plant Breeding Reviews is published in the form of one or two volumes per year. Recently published articles include: Epigenetics and Plant Breeding (v30) Enhancing Crop Gene Pools with Beneficial Traits Using Wild Relatives (v30) Coffee Germplasm Resources, Genomics and Breeding (v30) Molecular Genetics and Breeding for Fatty Acid Manipulation in Soybean (v30) Breeding Southern Highbush Blueberries (v30) Development of Fire Blight Resistance by Recombinant DNA Technology (v29)
Author: Victor Sadras Publisher: Academic Press ISBN: 0128191953 Category : Technology & Engineering Languages : en Pages : 780
Book Description
Crop Physiology: Case Histories of Major Crops updates the physiology of broad-acre crops with a focus on the genetic, environmental and management drivers of development, capture and efficiency in the use of radiation, water and nutrients, the formation of yield and aspects of quality. These physiological process are presented in a double context of challenges and solutions. The challenges to increase plant-based food, fodder, fiber and energy against the backdrop of population increase, climate change, dietary choices and declining public funding for research and development in agriculture are unprecedented and urgent. The proximal technological solutions to these challenges are genetic improvement and agronomy. Hence, the premise of the book is that crop physiology is most valuable when it engages meaningfully with breeding and agronomy. With contributions from 92 leading scientists from around the world, each chapter deals with a crop: maize, rice, wheat, barley, sorghum and oat; quinoa; soybean, field pea, chickpea, peanut, common bean, lentil, lupin and faba bean; sunflower and canola; potato, cassava, sugar beet and sugarcane; and cotton. A crop-based approach to crop physiology in a G x E x M context Captures the perspectives of global experts on 22 crops
Author: Henry T. Nguyen Publisher: CRC Press ISBN: 0824750896 Category : Science Languages : en Pages : 543
Book Description
Global demand for wheat, rice, corn, and other essential grains is expected to steadily rise over the next twenty years. Meeting this demand by increasing production through increased land use is not very likely; and while better crop management may make a marginal difference, most agriculture experts agree that this anticipated deficit must be made up through increased crop yields. The first resource of its kind, Physiology and Biotechnology Integration for Plant Breeding assembles current research in crop plant physiology, plant biotechnology, and plant breeding that is aimed toward improving crop plants genetically while supporting a productive agriculture ecosystem. Highly comprehensive, this reference provides access to the most innovative perspectives in crop physiology – with a special emphasis on molecular approaches – aimed at the formulation of those crop cultivars that offer the greatest potential to increase crop yields in stress environments. Surveys the current state of the field, as well as modern options and avenues for plant breeders and biotechnologists interested in augmenting crop yield and stability With the contributions of plant scientists from all corners of the globe who are actively involved in meeting this important challenge, Physiology and Biotechnology Integration for Plant Breeding provides readers with the background information needed to understand this cutting-edge work, as well as detailed information on present and potential applications. While the first half of the book establishes and fully explains the link between crop physiology and molecular biology, the second part explores the application of biotechnology in the effective delivery of the high yield and environmentally stable crop plants needed to avert the very real possibility of worldwide hunger.
Author: Ratikanta Maiti Publisher: CRC Press ISBN: 1000286908 Category : Science Languages : en Pages : 268
Book Description
This new volume, Advances in Sorghum Science: Botany, Production, and Crop Improvement, provides an easy-to-read and comprehensive treatment of the sorghum crop. With the world’s production of sorghum topping over 55 million tons annually, sorghum is very important for as a staple dietary food for much of the world as a rich source of micronutrients and macronutrients, as an ingredient in the processing of many foods, and as a source of fodder. The authors of the volume provide detailed information on sorghum from several disciplines and bring together recent literature under one umbrella. The book covers the various aspects of the sorghum crop, starting from its origin, to its domestication, and going on to biotechnology of the crop. It describes sorghum production, ideotypes, botany, physiology, abiotic and biotic factors affecting crop productivity, methods of cultivation, postharvest management, grain quality analysis for food processing, improvement of sorghum crop, and research advancements in breeding and biotechnology. This valuable resource will be helpful to researchers and scientists working to understand the relation between various disciplines and the implementation of new methods and technology for crop improvement and higher productivity. The multi-pronged approach will help to enable the increase sorghum productivity to meet the world’s growing demands.
Author: Frank Maulana Publisher: ISBN: Category : Languages : en Pages :
Book Description
The approach used to identify inbred lines that can produce superior hybrids is costly and time-consuming. It requires creation of all possible crosses and evaluation of the crosses to estimate combining abilities for the desired traits. Predicting heterosis or hybrid performance in any way possible may help to reduce the number of crosses to be made and evaluated. In this study, four sets of experiments were conducted to determine whether heterosis can be predicted based on inbred line performance, genetic distance between parents and genomic prediction model. The first experiment was aimed at assessing the levels of genetic diversity, population structure and linkage disequilibrium (LD) in 279 public sorghum inbred lines, based on 66,265 SNPs generated using the genotyping-by-sequencing (GBS) platform. The inbred lines were developed at different times over the last two decades and harbor robust diversity in pedigree and agronomic characteristics. Some of the inbreds are resistant to Acetolactate synthase (ALS) and Acetyl co-enzyme-A carboxylase (ACC) inhibitor herbicides. The mean polymorphic information content (PIC) and gene diversity across the entire inbreds were 0.35 and 0.46, respectively with non-herbicide resistant inbreds harboring more diversity than the herbicide resistant ones. The population structure analysis clustered the inbred lines into three major subgroups according to pedigree and fertility-reaction with the maintainer lines (B-lines) distinctly forming a separate cluster. Analysis of molecular variance (AMOVA) revealed more variation within subgroups than among subgroups. Substantial linkage disequilibrium (LD) was detected between the markers in the population with marked variation between chromosomes. This information may facilitate the use of the inbreds in sorghum breeding programs and provide perspectives for optimizing marker density for gene mapping and marker-assisted breeding. The second experiment, based on 102 F1 hybrids developed by intercrossing closely and distantly related inbreds, was conducted to investigate the relationship of genetic distance between parents with hybrid vigor or heterosis. The F1 hybrids alongside their parents were evaluated at two environments in a randomized complete block design with three replications. The results show that correlations of genetic distance between parents with hybrid performance and heterosis were variable and dependent on the trait. Though most were statistically non-significant and not strong to be used as predictor for heterosis, the results tend to show that certain level of genetic distance between parents is needed to capture maximum heterosis and hybrid performance. The objective of the third research study was to determine whether traits measured on parents can be used to predict hybrid performance in sorghum and to assess the combining ability of selected inbreds. Forty-six parental inbred lines and 75 F1 hybrids generated from intercrossing the inbreds were evaluated in four environments in a randomized complete block design with three replications. The average performance of the parents (mid-parent) was significantly correlated with hybrid performance for thousand kernel weight, days to flowering and plant height. Significant general (GCA) and specific (SCA) combining abilities were observed for most traits, with highly significant GCA effects observed for most traits as compared to SCA indicating that additive genetic effects are more important in affecting the inheritance of the traits measured. Results show that studying parental inbred line performance could generate important information for predicting hybrid performance in sorghum. The fourth experiment was aimed at assessing the efficacy of genomic prediction of hybrid performance in sorghum. Genomic prediction was performed with five-fold cross-validation procedure on 204 F1 hybrids developed using 102 inbred lines. A total of 66,265 SNP markers generated using genotyping-by-sequencing were used in this study. Results showed that increasing training population size increased prediction accuracies for all traits with the effect being different for different traits. Also, considering additive effects alone versus additive and dominance effects in the model showed similar trend of prediction accuracy but the full model (considering both additive and dominance effects of the markers) provided better prediction at least for some of the traits. The results suggest that genomic prediction could become an effective tool for predicting the performance of untested sorghum hybrids thus adding efficiency to hybrid selection.
Author: Sanjana Reddy Publisher: Academic Press ISBN: 0128019395 Category : Technology & Engineering Languages : en Pages : 249
Book Description
Genetic Enhancement of Rabi Sorghum – Adapting the Indian Durras presents both the historical background and the recent research done in breeding this important world crop for more global production. Its chapters cover topics in origin and taxonomy, morphology and breeding behavior, genetics, and cytogenetics, also looking at production, nutrition, and alternate uses. The durra race is Ethiopian in origin and its introgression with wild forms permitted adaptation to drier conditions. These have migrated and adapted to the currently known crop that is cultivated in the winter season and commonly called rabi sorghums. Grown under receding soil moisture conditions, rabi sorghums have tolerance to abiotic stresses apart from biotic stresses, unlike the rainy sorghums that are grown widely in the world. However, they must be more resilient to rapid changes in climate, for example. The variability from winter sorghums is being introgressed into rainy sorghums. With the yield plateaus reached and sorghum gaining importance as a food crop, this book will be of importance to those studying durras and their breeding. - Presents both the historical background and most recent research done in breeding rabi sorghum for more global production - Provides information on the adaptation of the crop and the ways it has migrated to the currently known crop, which is cultivated in winter season and commonly called as rabi sorghum - Explores strategies for resilience as the crop must be prepared to withstand rapid and varying changes in climate
Author: Sylvester Addy
Author: Sylvester Addy
Author: Jules Janick
Author: Jean-Marcel Ribaut![Variation of 14C Assimilate Export and Partitioning in Reduced Progressive Senescent and Senescent Sorghums [Sorghum Bicolor (L.) Moench] and the Potential Use of Anatomical Features as a Genetic Marker for Variation in Sorghum PDF](https://books.google.com/books/content/images/frontcover/PQ9XOAAACAAJ?fife=w80-h100)
Author: Jeffery Alan Dahlberg
Author: Victor Sadras
Author: Henry T. Nguyen
Author: Ratikanta Maiti![Agronomic, Genetic and Genomic Approaches for Predicting Heterosis in Sorghum [Sorghum Bicolor (L.) Moench] PDF](https://books.google.com/books/content/images/frontcover/maODAQAACAAJ?fife=w80-h100)
Author: Frank Maulana
Author: Sanjana Reddy
Author: Urs Schmidhalter