Download or read book Specific Combining Ability Estimates in Winter Wheat Crosses written by Surendra Prasad Sinha and published by . This book was released on 1962 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Estimates of Heterosis and Combining Ability in Crosses Among Seven Hard Red Winter Wheat Varieties written by Young Woung Lee and published by . This book was released on 1969 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combining Ability and Gene Action Estimates and the Association of the Components of Yield in Winter Wheat Crosses written by Warren Ervind Kronstad and published by . This book was released on 1963 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: A diallel cross consisting of ten parents was grown on the Hyslop Agronomy Farm near Corvallis, Oregon, in order to obtain estimates of the gene action contributing to yield and its components in wheat. Gene action estimates were obtained by two methods of diallel analysis and from narrow sense heritability values calculated by parent-progeny regressions involving both parental and F[subscript 1] data. In addition, path-coefficient analysis was utilized to investigate the direct and indirect associations of five variables on yield. The morphological characters measured were: (1) total yield per plant, (2) weight per kernel, (3) number of kernels per spikelet, (4) number of spikelets per spike, (5) number of spikes per plant and, (6) plant height. A large portion of the total genetic variation associated with the yield components, weight per kernel, kernels per spikelet, spikelets per spike and spikes per plant was the result of additive gene action. When the five variables were considered in terms of their associations with yield it was observed that weight per kernel, number of kernels per spikelet and the number of spikelets per spike mainly exerted direct effects on yield. The number of spikes per plant had no direct effect, but an indirect effect on yield through the other variables. A similar indirect association was noted for plant height. The data obtained from the path-coefficient analysis indicated further that the number of kernels per spikelet had the greatest direct effect on yield. Results obtained with correlation coefficients suggested that a negative association exists between weight per kernel and kernels per spikelet. Also such a negative association was found between the number of spikes per plant with weight per kernel and kernels per spikelet. These results would suggest the possible existence of a biological limitation between several of the components of yield. The diallel cross analysis for general and specific combining ability gave similar estimates of gene action when they were compared to narrow sense heritability values. However, when the Jinks-Hayman method was compared with the other two methods of estimating gene action, several discrepancies were observed. This lack of agreement was possibly due to the inability of this experimental material to meet one or all of the genetic assumptions required by the Jinks-Hayman method. The results of this study indicate that a breeding program with emphasis on increases in yield which considers each of the components separately, or in combination of two or more would offer the most promise. By this procedure the breeder could take advantage of the large amount of additive genetic variance associated with each of the components and at the same time, take into consideration any biological limitations which may exist. In utilizing the information obtained in this study in such a breeding procedure the plant breeder would be able to better evaluate the methods for selecting the best parents to be hybridized and in selecting the best lines from hybrid progeny.
Download or read book Heterosis Inbreeding Depression and Combining Ability Estimates from Diallel Crosses in Hard Red Winter Wheat written by Young Woung Lee and published by . This book was released on 1973 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studies on Hybrid Vigor and Combining Ability in Wheat Diallel Crosses written by Daulat N. Sajnani and published by . This book was released on 1968 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AGRONOMIC MILLING AND BACKING CHARACTERISTICS OF HYBRID SPRINGWHEATS TRITICUM AESTIVUM L written by PABLO ENRIQUE LARREA and published by INIAP Archivo Historico. This book was released on with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomic Milling and Baking Characteristics of Hybrid Spring Wheats Triticum Aestivum L written by Pablo Enrique Larrea and published by INIAP Archivo Historico. This book was released on 1966 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combining Ability Analysis of Anatomical Components of the Dry Fruit of Capsicum Annuum L written by Omar Marín and published by . This book was released on 1970 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Combining Abilities of Three Quality Parameters in Five Soft Winter Wheats Triticum Aestivum L Aestivum written by Susan Gildehaus Aylward and published by . This book was released on 1985 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Genetics and Exploitation of Heterosis in Crops written by CIMMYT. and published by CIMMYT. This book was released on 1997 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Indian Journal of Agricultural Sciences written by and published by . This book was released on 1979 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Diallel Cross Study in Maise written by Balwant S. Sekhon and published by . This book was released on 1966 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Journal of Cytology and Genetics written by and published by . This book was released on 1980 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pakistan Journal of Agricultural Research written by and published by . This book was released on 2000 with total page 80 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 1965 with total page 1760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bangladesh Journal of Agricultural Research written by and published by . This book was released on 1981 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
