Download or read book Identification of Quantitative Trait Loci QTL in Maize on the Basis of F3 and Testcross Progeny Performance written by Thomas Lane Gocken and published by . This book was released on 1993 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantitative Trait Loci Analysis in Animals written by Joel Ira Weller and published by CABI. This book was released on 2009 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantitative Trait Loci (QTL) is a topic of major agricultural significance for efficient livestock production. This advanced-level textbook covers all the statistical methods that have been used or proposed for detection and analysis of QTL and marker- and gene- assisted selection in animal genetics and breeding, as well as new advances that have revolutionized the field since the first edition.
Download or read book Quantitative Trait Loci written by Nicola J. Camp and published by Springer Science & Business Media. This book was released on 2008-02-03 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt: In Quantitative Trait Loci: Methods and Protocols, a panel of highly experienced statistical geneticists demonstrate in a step-by-step fashion how to successfully analyze quantitative trait data using a variety of methods and software for the detection and fine mapping of quantitative trait loci (QTL). Writing for the nonmathematician, these experts guide the investigator from the design stage of a project onwards, providing detailed explanations of how best to proceed with each specific analysis, to find and use appropriate software, and to interpret results. Worked examples, citations to key papers, and variations in method ease the way to understanding and successful studies. Among the cutting-edge techniques presented are QTDT methods, variance components methods, and the Markov Chain Monte Carlo method for joint linkage and segregation analysis.
Download or read book Identification of Quantitative Trait Loci Associated with Flowering Vegetative Traits and Photoperiod Response in Maize Zea Mays L written by Rkia Moutiq and published by . This book was released on 2002 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: In general, maize, especially germplasm from the tropics and subtropics, is sensitive to photoperiod. This sensitivity hindered the exchange of germplasm between latitudes. To identify quantitative trait loci (QTL) associated with the response to photoperiod, a population of 236 F3 lines produced from a cross between a photoperiod-sensitive line CML9 and insensitive inbred A632Ht was used. These F3 lines were evaluated in three long and three short-day environments, in adjacent fields using artificial light, and in fields located in different latitudes, Mexico and Iowa. Days from sowing to anthesis (DTA), final leaf number (FLN) and plant height (PH) were measured. For each of these traits, photoperiod response (PPR) was estimated as the difference between the trait in long- and short-days divided by the trait in short-days. Composite interval mapping was used to detect QTL for each trait and comparison of locations of QTL detected in different daylengths for the same trait and for different traits were examined. A unique set of QTL was detected for each photoperiod and for each trait. One QTL for DTA, three QTL for FLN and four QTL for PH were detected in the same genetic regions in both daylengths. Five QTL for DTA, four QTL for FLN and three QTL for PH were detected only in long-day environments. Nine QTL for DTA, five QTL for FLN and three QTL for PH were detected only in short-day environments. QTL for photoperiod response were detected on four chromosomes for PPR[Subscript DTA], on three chromosomes for PPR[Subscript FLN] and on three chromosomes for PPR[Subscript PH]. Chromosomes 2, 3, 4, 5, 6, 8, 9, and 10 had a cluster of QTL for different traits. This might suggest a common initial mechanism with subsequent specific pathways that regulate different traits.
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1993 with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Genetic Analysis of Quantitative Trait Loci with Inbred and Hybrid Progeny of Maize written by David Frederick Austin and published by . This book was released on 1997 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first objective of this study was to compare quantitative trait loci (QTL) detection in two climatically diverse environments in a population of F6:-- lines of an elite maize (Zea mays L.) single-cross. The second objective was to detect QTL for general (GCA) and specific (SCA) combining ability effects in hybrid progeny of F2:3 and F6: lines from the same population. Evaluations of both inbred per se and hybrid progeny from the same population enabled comparisons between QTL controlling the two progeny types. The results from the F6:-- inbred progeny evaluations suggest that QTL detection can be greatly affected by environmental conditions with only 17% (grain yield traits) and 35% (morphological traits) of the QTL detected among the stress and nonstress environments being detected in both environments. The mean environment was effective in detecting 68% (morphological traits) and 54% (grain yield traits) of the QTL detected in either of the individual environments.
Download or read book Identification of Quantitative Trait Loci Im Maize written by Michael Richard Kerns and published by . This book was released on 1998 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification of Quantitative Trait Loci QTL for Gray Leaf Spot Resistance Maturity and Grain Yield in a Semi tropical Recombinant Inbred Population of Maize written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Identification of QTL can aide in future breeding objectives by allowing breeders either to improve a line through targeted introgressions or assist in forward breeding strategies. Such analyses may be particularly helpful in integrating exotic germplasm into a breeding program. The percentage of tropical maize germplasm grown in U.S. farmers' fields is almost nonexistent. Tropical germplasm in maize (Zea mays L.) is a valuable resource to decrease the dependence upon a limited genetic base currently used to produce commercial hybrids, extend selection limits for grain yield, and to provide an insurance function against emerging biotic and abiotic stresses. Results of research presented in this dissertation support these recommendations. Experiments were conducted to evaluate 143 S4:5 recombinant inbred lines (RILs) resulting from a cross between NC300, an all-tropical, temperate adapted line, and B104, a stiff stalk line. The 143 RILs were topcrossed to the Lancaster tester FR615xFR697 and randomly subdivided into two sets. The two sets were evaluated for resistance to GLS disease and yielding ability in three and eight North Carolina environments, respectively. Spatial trends were examined in the GLS trials. Significant (P d".01) trend effects were fitted in five of the six set-by-environment combinations, which led to improved analyses within and across environments for both sets. Ninety-three and eighty-two percent of the RILs in topcrosses (RILT) were significantly (P = 0.05) more resistant to GLS when compared to the mean of the commercial checks for set 1 and 2, respectively. Twenty-one RILs from both sets did not differ significantly (P = 0.05) for grain yield when compared to the mean of the commercial checks. RIL 2070 yielded significantly (P = 0.05) higher when compared to one commercial check, HC33. TR7322. RIL 1991 was rated the most resistant entry in set 1 and also did not differ from the mean of the commercial checks for grain yield. The RILs we.
Download or read book Identification of Alleles from Exotic Maize for Maize Improvement Using Advanced Backcross QTL Analysis written by Huver Posada-Suarez and published by . This book was released on 2000 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mapping Quantitative Trait Loci for Maturity and Correlated Traits in Maize Using RFLP Markers written by Sidney Netto Parentoni and published by . This book was released on 1993 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: RFLP markers were used to map quantitaive trait loci for maturity and correlated traits in maize. A linkage map was obtained forhe cross A662 x B73 using data from 63 RFLP markers. A total of 151 F3 lines form A662 X B73 were evaluated in per se and in testcrosses in three Minnesota location in 1992. MAPMAKER-QTL was used to analysis the F3 data an single factor ANOVA considering only the two homozygous parental marker classes was used for analyze the testcross data. Five unlinked chromosomal regions (chromosomes 1, 3, 5, 8 and 9) were shown to be associated with early maturity in this cross. A major maturity factor was identified on chromosome 8 close to the marker UMC12. This region was also strongly associated with node number. The maturity regions identified in general were also linked to plant height or to one of the plant height components, suggesting the possibility of pleiotropy. However, our data are not sufficient to distinguish between pleiotropy and tight linkage. Plant height is controlled by both node number and internode length and these last two traits are controlled by different chromosomal regions. No evident was found for marker class x location interaction. F3 per se evaluation and testcross results showed the same chromosomal regions as important in controlling maturity in the cross studied. Results from the F3 per se analysis agree with the conclusions from a previous study (Kim, 1992) using backcross derived lines from the cross A662 x B73.
Download or read book Assessment of Diversity and Mapping of Quantitative Trait Loci in Sweet Corn written by James T. Gerdes and published by . This book was released on 1992 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identifying Quantitative Trait Loci in Experimental Crosses written by Karl William Broman and published by . This book was released on 1997 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Identification of Loci Influencing Teosinte Crossing Barrier 1 Tcb1 Efficacy in Maize by Quantitative Trait Loci QTL Mapping and Genome wide Association Study GWAS written by Namrata Maharjan and published by . This book was released on 2021 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomy News written by and published by . This book was released on 1993 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.
Download or read book Identification of Quantitative Trait Loci from the Rice Wild Relative Orzya Rufipogon and Refined Mapping of a Flowering Time QTL written by Michael James Thomson and published by . This book was released on 2002 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantitative Trait Loci QTL written by Scott A. Rifkin and published by Humana Press. This book was released on 2012-05-09 with total page 331 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the last two decades advances in genotyping technology, and the development of quantitative genetic analytical techniques have made it possible to dissect complex traits and link quantitative variation in traits to allelic variation on chromosomes or quantitative trait loci (QTLs). In Quantitative Trait Loci (QTLs):Methods and Protocols, expert researchers in the field detail methods and techniques that focus on specific components of the entire process of quantitative train loci experiments. These include methods and techniques for the mapping populations, identifying quantitative trait loci, extending the power of quantitative trait locus analysis, and case studies. Written in the highly successful Methods in Molecular BiologyTM series format, the chapters include the kind of detailed description and implementation advice that is crucial for getting optimal results in the laboratory. Thorough and intuitive, Quantitative Trait Loci (QTLs):Methods and Protocols aids scientists in the further study of the links between phenotypic and genotypic variation in fields from medicine to agriculture, from molecular biology to evolution to ecology.
Download or read book Identification of Quantitative Trait Loci for Gray Leaf Spot Resistance Maturity and Grain Yield in a Semi tropical Recombinant Inbred Population of Maize written by Michael Phillip Jines and published by . This book was released on 2004 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: qtl, maturity, gls resistance.
