Download or read book Evaluation of Maize Inbreds for Cold Tolerance when Grown in Controlled and Field Environments written by Jeffrey S. Posch and published by . This book was released on 1994 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Variation for Chilling Stress and Spectral Reflectance in Short Season Maize written by Wisam Obeidat and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Increasing early season cold tolerance of maize (Zea mays L.) has the potential to lengthen its growing season and enhance yields. We evaluated cold tolerance across 44 inbred and 102 hybrid genotypes in field and controlled environment experiments. Cold tolerance was quantified as the proportion of dry weight (PDW) of plants subjected to cold temperatures or planted early, relative to dry weight of plants grown in control temperatures or planted late. Also, leaf reflectance spectroscopy was used as an alternate indicator of cold stress response. In field experiments, significant effects of genotype, planting date, environment and their interactions were detected for PDW; the mean dry weight per plant for the early planting was considerably lower than for the late planting in five field environments. Cold stress exposure resulted in higher leaf reflectance in the 500 ̶ 680 nm region and lower reflectance between 758 ̶ 1000 nm. We identified novel reflectance predictors, both normalized difference indices and specific wavelengths of first derivative reflectance spectra, that correlated with PDW. In some cases the strongest correlations were found when reflectance data came from unstressed plants. Multiple regression models combining first derivative reflectance at multiple wavelengths, measured on plants not exposed to cold stress, provided the best correlation with PDW; however in general these models were unique to an experiment. Genetic control and heritability of plant dry weight and leaf spectral reflectance under control and early planting conditions was investigated in the field using a North Carolina Design II mating experiment. Consistent general combining ability estimates from early and late planting indicated that additive and dominant gene effects explained hybrid biomass variation across both planting dates. A number of spectral traits were heritable, but parental contributions to hybrid values were moderate. In conclusion, we find that parents explain at most moderate levels of hybrid spectral reflectance variation, across all spectral analysis tools. Thus, selection of traits such as hybrid biomass using spectral reflectance will be inefficient. Nonetheless, we find spectral reflectances stably distinguish maize genotypes within a population irrespective of temperature treatments, so selecting inbred lines using spectral reflectance may advance breeding efforts.
Download or read book The Maize Genome written by Jeffrey Bennetzen and published by Springer. This book was released on 2018-11-24 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses advances in our understanding of the structure and function of the maize genome since publication of the original B73 reference genome in 2009, and the progress in translating this knowledge into basic biology and trait improvement. Maize is an extremely important crop, providing a large proportion of the world’s human caloric intake and animal feed, and serving as a model species for basic and applied research. The exceptionally high level of genetic diversity within maize presents opportunities and challenges in all aspects of maize genetics, from sequencing and genotyping to linking genotypes to phenotypes. Topics covered in this timely book range from (i) genome sequencing and genotyping techniques, (ii) genome features such as centromeres and epigenetic regulation, (iii) tools and resources available for trait genomics, to (iv) applications of allele mining and genomics-assisted breeding. This book is a valuable resource for researchers and students interested in maize genetics and genomics.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 2004 with total page 692 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CSSA Special Publication written by and published by . This book was released on 1998 with total page 1074 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report of Annual Corn and Sorghum Research Conference written by and published by . This book was released on 1995 with total page 656 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Abiotic Stresses written by M. Ashraf and published by CRC Press. This book was released on 2005-04-07 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: Gain a better understanding of the genetic and physiological bases of stress response and stress tolerance as part of crop improvement programs Abiotic Stresses: Plant Resistance Through Breeding and Molecular Approaches explores innovative methods for breeding new varieties of major crops with resistance to environmental stresses that l
Download or read book Screening for Low Temperature Stress Tolerance in Maize written by Shelly Nicole Shurney and published by . This book was released on 2003 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Maize (Zea mays L.), is considered by many to be one of the most meaningful crops grown in the USA and in many countries around the world. Despite its sub-tropical origins, maize endures many unfavorable conditions effecting growth and development. With a wide genetic background, many desirable cold tolerant traits in maize have been identified, but there are still many more to be discovered. The method of identifying these various mechanisms and traits of cold tolerance is the purpose of my study. Three maize inbred (A619, B73, CO255) lines that all have illustrated various genetic differences were used to determine: electrical conductivity, percent potassium leakage as a result of membrane permeability and dry weight accumulation. Seedlings were grown at 22/24°C until the 4th leaf stage at which time they were transferred to the experimental treatment regime of 8/6°C for 48 hours and 9 hours. After stress treatments regime plants were returned to the control temperature of 22/24°C to recovery until the 5th leaf stage. There were significant differences found among all growth parameters tested. Inbred line B73 was found to have the highest percentage of electrical conductivity when tested at 48 hours of 8/6°C. B73 was also recorded to have the highest amount of potassium leached as a result of treatment regime. When comparing the amount of dry weight accumulation CO255 was the largest of the three inbred lines tested. But when dry weight was compared before and after treatment B73 had the largest amount of growth after recovery from the treatment regime. This suggests that though CO255 was the largest of all the inbred lines tested, B73 had a greater amount of dry weight accumulation after or during recovery. The evaluation of these inbred lines did not allow a definite evaluation of the whole genetic background of the experimental lines tested, but chilling did induce the seedlings to respond in such a way that desirable characteristics could be identified.
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1994 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book New Zealand Journal of Agricultural Research written by and published by . This book was released on 1983 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Plant Cold Hardiness written by Paul H. Li and published by CRC Press. This book was released on 2018-01-10 with total page 287 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Plant Cold Hardiness provides a detailed, up-to-date discussion of plant cold hardiness research. The molecular mechanisms of plant cold hardiness development, a subject not covered in any other low temperature stress book, is examined in depth. Other major topics addressed include the freezing tolerance and injury of plant tissues in vivo and in vitro, in addition to how research findings impact agricultural applications. The articles featured in Advances in Plant Cold Hardiness were presented as key papers at the 4th International Plant Cold Hardiness Seminar held at the Swedish University of Agricultural Sciences in Uppsala in July, 1991. The book will appeal to all researchers, students, and instructors in plant biology, agriculture, and forestry.
Download or read book Plant Genome written by Deborah Y. Richardson and published by . This book was released on 1992 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genomic Designing of Climate Smart Cereal Crops written by Chittaranjan Kole and published by Springer Nature. This book was released on 2020-02-28 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights modern methods and strategies to improve cereal crops in the era of climate change, presenting the latest advances in plant molecular mapping and genome sequencing. Spectacular achievements in the fields of molecular breeding, transgenics and genomics in the last three decades have facilitated revolutionary changes in cereal- crop-improvement strategies and techniques. Since the genome sequencing of rice in 2002, the genomes of over eight cereal crops have been sequenced and more are to follow. This has made it possible to decipher the exact nucleotide sequence and chromosomal positions of agroeconomic genes. Most importantly, comparative genomics and genotyping-by-sequencing have opened up new vistas for exploring available biodiversity, particularly of wild crop relatives, for identifying useful donor genes.
Download or read book Handbook of Maize Its Biology written by Jeff L. Bennetzen and published by Springer Science & Business Media. This book was released on 2008-12-25 with total page 593 pages. Available in PDF, EPUB and Kindle. Book excerpt: Handbook of Maize: Its Biology centers on the past, present and future of maize as a model for plant science research and crop improvement. The book includes brief, focused chapters from the foremost maize experts and features a succinct collection of informative images representing the maize germplasm collection.
Download or read book Evaluation of Visual S1 Recurrent Selection for Early Vigor in Maize written by Daryl Keith Hexum and published by . This book was released on 1984 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Physical Stresses in Plants written by Stefania Grillo and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt: The workshop "Genes and their products for tolerance to physical stresses in plants" was held in Maratea, Italy, from 24-27 September 1995. As one of a series of activity launched by the European Science Foundation (ESF) Network "Cell Stress Genes and their Protein Products", the workshop was the only one entirely devoted to research in the plant field. Around one hundred participants from fourteen different countries enjoyed a lively meeting in an atmosphere of sunny Mediterranean weather. A total of twenty-eight speakers from universities and research institutes were invited to present the most recent results of their research. The workshop was divided into eight sessions, namely heat, cold, salt, drought, oxidative stress, light stress, a conclusive session for recommendations and a poster session. The results reported in this workshop broadly showed the rapid progress made in the understanding of the molecular mechanisms underlying basic aspects of the plant response to environmental stresses.
Download or read book Agronomy Journal written by and published by . This book was released on 1949 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt: An international journal of agriculture and natural resource sciences.
