Download or read book Studies on the Comparison of Predicted and Actual Performance of Dwarf and Dwarf X Tall Double Cross Hybrids in Maize Zea Mays L written by I. Swarnalatha Devi and published by . This book was released on 1990 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on Yield Performance of Dwarf X Tall Hybrids in Maize Zea Mays L Involving Line X Tester Design written by K. Neeraja and published by . This book was released on 1989 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Plant Breeding Abstracts written by and published by . This book was released on 1988 with total page 1392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Maize Dwarf Mosaic Virus written by R. W. Toler and published by . This book was released on 1982 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Five Texas corn double crosses, the single-cross parents, and the inbreds used to make the single crosses were studied for their reaction to inoculation of maize dwarf mosaic virus strain A (MDMV). Characteristics studied included: days to silk, plant height, ear height, disease ratings, yield, shelling percent and test weights. Significant differences occurred between inoculated diseased vs. uninoculated healthy single crosses and double-cross hybrids due to the effects do suceptible inbred lines. No significant differences occured with the crosses among the resistant lines. MDMV caused differences among hybrids entries for each characteristic considered. All entries generally showed the same disease symptoms, to different degrees. Maize dwarf mosaic virus delayed maturity, reduced plant and ear heights, and reduced yields. There was on effect on shelling pecent, test weights, ear length, or seed set. When three susceptible inbred lines were in a double-cross hybrid, MDMV significantly affected the performance of the hybrid.
Download or read book Studies on Combining Ability and Prediction of Superior Double and 3 way Cross Hybrids in Maize Zea Mays L written by M. Venkat Raveendranath and published by . This book was released on 1988 with total page 133 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 1978 with total page 1276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on the Relative Performance of Double Cross Maize Hybrids with Special Reference to Hybrid X Location Interaction written by G. B. Pradhan and published by . This book was released on 1962 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General and Specific Combining Ability of Eight Maize Inbred Lines Part I II Comparative Performance of Single Double and Synthetic Hybrids written by Devender Kumar Nanda and published by . This book was released on 1964 with total page 238 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 1989 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1984 with total page 1086 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1973- include the following subject areas: Biological sciences, Agriculture, Chemistry, Environmental sciences, Health sciences, Engineering, Mathematics and statistics, Earth sciences, Physics, Education, Psychology, Sociology, Anthropology, History, Law & political science, Business & economics, Geography & regional planning, Language & literature, Fine arts, Library & information science, Mass communications, Music, Philosophy and Religion.
Download or read book Impact of Genotype X Environment Interaction and Selection History on Genomic Prediction and Correcting for Non systematic Variability to Increase Efficiency in Maize Zea Mays L Breeding written by Martin Carlos Costa and published by . This book was released on 2024 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Developing cultivars with high yield potential and stability across environments is essential to sustain the increasing global population in the context of climate change. Maize (Zea mays L.) is the major crop grown in the United States. Maize breeding processes involve genomic selection and the evaluation of experimental hybrid phenotypes using small plots to estimate genotypic performance. In this dissertation, I work with an extensive multi-environmental trial dataset with the goals to (1) characterize the relative value of the three donor inbreds as sources of useful alleles representing elite, non-elite, and un-selected donor types, (2) understand genomic prediction models that effectively identify new hybrids. Results showed that the parent with additional breeding cycles (elite) produced hybrids with lower genotype by environment interaction (GxE) variance. The reduced GxE variance of the population with the longest history of selection for favorable alleles led to greater prediction accuracy), contributing to greater yield stability. My second study in the dissertation assesses the impact of plant stand (number of plants per plot) and plant spacing variability in contributing non-heritable variation in breeding trials. We evaluated the grain yield performance of five hybrids exhibiting varied ear-flex traits across five manually adjusted plant spacing setups. Results demonstrated that in 36% of the occasions, we found differences that were not a reflection of genotypic effects but rather variations in spacing conditions (significant differences). However, incorporating the plot length, stand count, and plant spacing data into the model corrected for the non-systematic variability in the breeding trial.
Download or read book Physiological Basis of Yield Expression in Dwarf and Tall Inbred Lines and Their Single Cross Hybrids in Maize zea Mays L written by Hari Singh and published by . This book was released on 1975 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography of Agriculture with Subject Index written by and published by . This book was released on 1987-10 with total page 1238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Comparison of Full Sib Hybrids and Testcross Progeny Tests for Genomic Prediction and Line X Tester Analysis of Hybrids of Two Multiparental Maize Populations written by Brett Burdo and published by . This book was released on 2018 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this experiment, we compare two progeny tests for unevaluated maize doubled haploids (DH) from two six-line synthetic populations with founders representing the Stiff Stalk and Iodent heterotic patterns. Either testcrossing, where lines are crossed to a common tester of the opposite group, versus information from hybrids produced by randomly crossing pairs of untested inbred lines, deemed Full-Sib (FS) hybrids, in the context of a genomic prediction enabled breeding program. Hybrids were evaluated for grain yield and 6 ancillary traits at two locations in 2014 and 2015, with two replications per location. Marker-based variance component estimates that account for deviations from Hardy-Weinberg equilibrium, suggest that the variance present in this population is predominantly additive. Coincidence of selection of the top 25 lines based on traditional General Combining Ability (GCA) for grain yield within the testcross and random pairs was 48% for the Stiff Stalk and 11% for the Iodent. Coincidence of selection using an additive model for genomic GCA estimation and testcross traditional GCA estimation was higher, at 56% for parental DH lines from either heterotic group. Partitioning dominance variation in the model increased coincidence of selection to 62% for the Stiff Stalk parents but did not increase coincidence beyond 56% for the Iodent. General Combining Ability (GCA)-based prediction accuracy of FS hybrid performance based on midparent of testcross performance was 0.73 and could not be improved with genomic prediction of the hybrid values. 10-fold cross validated prediction of the grain yield of hybrids of untested DH lines was 0.45 and 0.48 under an additive and additive + dominance G-BLUP model trained on the randomly paired lines, respectively, and 0.49 and 0.48 when trained on the testcrosses, none significantly different. Prediction of grain moisture, test weight, plant height and ear height were worse when training on the intercrossed population, but better for prediction of flowering traits. Incorporating marker information does allow for greatly improved GCA estimation from FS hybrids, but this is mostly due to accurate partitioning of additive effects, rather than a significantly enhanced capacity to capture non-additive effects with genomic estimation in the FS hybrids.
Download or read book Comprehensive Dissertation Index Agriculture written by and published by . This book was released on 1984 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of Maize Zea Mays L Inbred Lines by Their Three Way Cross Hybrid Performance written by GANGASHETTI M. G and published by . This book was released on 1996 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conference Papers Index written by and published by . This book was released on 1980 with total page 1256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
