Download or read book A Comparative Analysis of Tall Fescue and Kentucky Bluegrass Cultivars in the Transition Zone written by Dave Fox and published by . This book was released on 1989 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Masters Abstracts International written by and published by . This book was released on 1991 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Characterization of Texas Bluegrass X Kentucky Bluegrass Interspecific Hybrids for the Southern United States written by Meghyn Brianne Meeks and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Kentucky bluegrass (Poa pratensis L.) and tall fescue (Festuca arundinacea Schreb.) are commonly grown cool-season grasses in the United States for home lawns and various sports turf applications. However, environmental conditions such as prolonged periods of drought and heat as well as heavy shade often result in a loss of visual appeal, early dormancy, or death of the turf stand. Hybrid bluegrass (Poa spp.) cultivars derived from Texas bluegrass (P. arachnifera Torr.) x Kentucky bluegrass interspecific crosses may serve as viable alternatives for perennial turfgrass in the southern United States. Methods to aid in the breeding and selection of Texas x Kentucky bluegrasses for these environmental conditions would be useful. The goals of this research were to 1) develop new interspecific hybrid bluegrasses and optimize a seed germination technique, 2) use flow cytometry and molecular markers for the characterization of hybrid progeny, and 3) evaluate the growth response and performance of hybrid bluegrasses maintained in shade. In 2012 and 2013, controlled pollinations were made between different Poa species. Seed from these crosses were germinated through two different techniques that resulted in 61 new interspecific hybrids. A higher percentage of individuals (89%) were recovered through germination on nutrient agar medium than soil. In addition to these hybrids, 52 Texas x Kentucky hybrids created in 2001 were tested for three years in multiple locations across the southern states and the transition zone. Experimental hybrid TAES 5653, registered as DALBG 1201, was the superior genotype. Flow cytometry was used to estimate the DNA content of 19 Texas bluegrass genotypes, and four Texas x Kentucky bluegrass hybrids from two different pedigrees. Variability in DNA content suggested variability in the ploidy levels of Texas bluegrass. Texas x Kentucky bluegrass interspecific hybrids had an intermediate DNA content demonstrating flow cytometry can identify true hybrids between parents with vastly different DNA content. A thioredoxin-like (trx) nuclear gene was also useful in identifying true Texas x Kentucky bluegrass hybrids. A distinctive 851 bp trx allele with a 163 bp insertion site was also identified. The insertion is evidently a transposable element that may help to elucidate ancestors of Texas bluegrass. Another study was conducted to develop a method of comparing Texas x Kentucky bluegrass hybrids to commercial cultivars for shade tolerance. It was determined that evaluations should be conducted in the spring to early summer months using moderate shade (50%) levels, and high turfgrass quality and slower leaf elongation rates as selective traits. Trinexapac-ethyl was not necessary to reduce the leaf elongation rate or increase quality of dwarf hybrids under shade. In summary, several methods have been tested to generate and evaluate new Texas x Kentucky bluegrass hybrids. Seed germination conducted under controlled conditions using agar medium, and flow cytometry and the trx nuclear gene can be employed in bluegrass breeding programs to identify true interspecific hybrids. Finally, improved dwarf-type hybrid bluegrasses, such as DALBG 1201 and TAES 5654, seem to have enhanced shade tolerance and potential for use as perennial turfgrass alternatives in the southern and transition zone regions of the United States. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/155246
Download or read book Turfgrass Physiology and Ecology written by Gregory E. Bell and published by CABI. This book was released on 2011-01-01 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to face new challenges and unique situations in turfgrass management, students need to understand why specific management practices work and how to adjust them based on plants' requirements. Explaining the physiological needs of turfgrass plants, this advanced textbook outlines the management techniques that help supply those needs. Chapters discuss a range of practices and methods to cope with stress under both normal and less than optimum conditions, providing the decision making tools for improvement based on changing environmental conditions. This book presents a unique perspective of both science and practical management principles that will be applicable to all turfgrass sectors.
Download or read book Improved Kentucky Bluegrass Cultivars for Upper Transition Zone Golf Course Fairway Use written by Robb W. Kraft and published by . This book was released on 2002 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance of Texas Bluegrass Hybrids in the Transition Zone written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High temperature and drought may reduce quality in cool-season turfgrasses during summer in the transition zone. Texas bluegrass hybrids (HBG) are genetic crosses between native Texas bluegrass (Poa arachnifera Torr.) and Kentucky bluegrass (Poa pratensis L.) (KBG) that resemble KBG but may have greater drought and heat resistance than other cool-season grasses. The objectives of four studies were to evaluate high temperature, drought, and lower mowing height effects on HBG compared with KBG ('Apollo') and tall fescue (Festuca arundincea Schreb.)(TF, 'Dynasty'), compare their rooting characteristics, and investigate their membrane lipid molecular species compositional differences. Under high temperature (35/25[degrees]C, 14h light/10h darkness), HBG ('Thermal Blue') had greater quality and gross photosynthesis (Pg), and lower electrolyte leakage than KBG and TF in a growth chamber study. The combination of high temperature and drought (60% ET replacement) caused rapid declines in quality, but HBG generally performed better. In field and greenhouse studies, TF had more roots deeper in the profile than two HBG ('Reveille' and Thermal Blue) and KBG under well-watered conditions. In the field, quality and Pg were greatest in TF among turfgrasses. Performances in quality and Pg generally ranked: TF> Reveille>= Thermal Blue = KBG. In a separate mowing height and drought field study, HBG (Thermal Blue) generally had lower quality and Pg than KBG at both high (7.62 cm) and low (3.81 cm) heights but particularly at the low height. Drought resistance and tolerance to low mowing in Thermal Blue was similar to or poorer than in KBG. Under supra-optimum temperature (35 /25[degrees]C and 40 /30[degrees]C, 14h light/10h darkness), the ratio of digalactosyldiacylglycerol (DGDG) to monogalactosyldiacylglycerol (MGDG) was highest in HBG (Thermal Blue) and lowest in TF. Heat tolerance was also associated with higher phosphatidylethanolamine (PE) content, higher phosphatidylglycerol (PG) content, and reduced overall unsaturation compared with heat-sensitive. Results suggest that 40 membrane lipid molecules are potential biomarkers for heat tolerance and that compositional changes in lipids in response to heat may contribute to differences in heat tolerance among cool-season grasses. Generally, studies indicated greater heat resistance, but not drought resistance, in HBG than in KBG or TF.
Download or read book Evapotranspiration written by Megh R Goyal and published by CRC Press. This book was released on 2013-09-26 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers topics on the basic models, assessments, and techniques to calculate evapotranspiration (ET) for practical applications in agriculture, forestry, and urban science. This simple and thorough guide provides the information and techniques necessary to develop, manage, interpret, and apply evapotranspiration ET data to practical applications. The simplicity of the contents assists technicians in developing ET data for effective water management.
Download or read book Agronomy Abstracts written by and published by . This book was released on 1993 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes abstracts of the annual meetings of the American Society of Agronomy; Soil Science Society of America; Crop Science Society of America ( - of its Agronomic Education Division).
Download or read book Kentucky Bluegrass and Tall Fescue Varieties For Lawns and Turf written by University of Kentucky. Dept. of Agronomy and published by . This book was released on 1974 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evapotranspiration written by Leszek Labedzki and published by BoD – Books on Demand. This book was released on 2011-03-16 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evapotranspiration is a very complex phenomenon, comprising different aspects and processes (hydrological, meteorological, physiological, soil, plant and others). Farmers, agriculture advisers, extension services, hydrologists, agrometeorologists, water management specialists and many others are facing the problem of evapotranspiration. This book is dedicated to further understanding of the evapotranspiration problems, presenting a broad body of experience, by reporting different views of the authors and the results of their studies. It covers aspects from understandings and concepts of evapotranspiration, through methodology of calculating and measuring, to applications in different fields, in which evapotranspiration is an important factor. The book will be of benefit to scientists, engineers and managers involved in problems related to meteorology, climatology, hydrology, geography, agronomy and agricultural water management. We hope they will find useful material in this collection of papers.
Download or read book Proceedings of the Third International Turfgrass Research Conference written by James B Beard and published by . This book was released on 1980 with total page 560 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 1969 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turfgrass written by John C. Stier and published by John Wiley & Sons. This book was released on 2020-01-22 with total page 1348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainability is a key framework for analyzing biological systems—and turfgrass is no exception. It is part of a complex that encompasses turfgrass interactions with different environments and the suitability of different turfgrasses for specific environments. In addition to its biological role, turfgrass—in the form of lawns, green spaces, and playing surfaces—brings beneficial sociological effects to an increasingly urbanized society. This book presents a comprehensive overview of current knowledge and issues in the field of turfgrass research and management, including the genetics and breeding, the diseases and pests, and the ecology of turfgrasses, and will appeal to a broad spectrum of readers.
Download or read book Golf Course Management written by and published by . This book was released on 2006 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book California Agriculture written by and published by . This book was released on 1987 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agrindex written by and published by . This book was released on 1995 with total page 1280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1975 with total page 1196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
