Evaluation Of Grain Sorghum Hybrids And Parental Lines For Residue Yield And Quality
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An evaluation of parents of grain sorghum hybrids
| Author | : J. G. King |
| Publisher | : |
| Total Pages | : 15 |
| Release | : 1961 |
| Genre | : |
| ISBN | : |
This publication presents summarized data on origins, characteristics and performance of parental lines of sorghum hybrids. This information has been derived from the long-time cooperative sorghum improvement research of the Texas Agricultural Experiment Station and the Crops Research Division of the United States Department of Agriculture. The information will be especially useful to geneticists, breeders and producers of seed of sorghum hybrids. All the seed parents produce high-yielding hybrids with the male parents of highest combining value. A few high-yielding hybrids result from crossing parents neither of which has high combining value. Many of the male parents tested do not produce high-yielding hybrids with the female parents available.
Genetic and Combining Ability Analysis of Some Agronomic and Grain Quality Characters in Sorghum
| Author | : J.G.E.de FRANCA |
| Publisher | : |
| Total Pages | : 105 |
| Release | : 1983 |
| Genre | : |
| ISBN | : |
The objective of this study was to evaluate the combining ability, heterosis and variance components of a set of selected restorers and male sterile in sorghum for the following characters: days to 50% flowering, plant height, panicle length, grain yield per panicle, number of grains per panicle, thousand grain weight, grain breaking strength, % floaters, % water absorption, flour particle size index, rolling quality of the dough and gel spreading. Twenty parental lines - 11 male steriles and 9 restorers and their 99 hybrids formed the experimental material. parents and hybrids were palnted in adjancent trials in a RBD design with threee replications each. The combining ability analysis followed a line x tester mating system. The experiments were carried out under rainfed conditions during the rainy (kharif) and post-rainy (Rabi) seasons of 1982 at ICRISAT Center, patancheru, A.P., India. Significant variation was observed in the genotypes studied for most of the charactrs analysed. Generally the restorers showed larger variation than the male sterile lines. Significant levels of heterosis and heterobeltiosis were observed for plant height, grain yield per panicle, grain number per panicle and % floaters. Dominace was in the direction of earliness, increased height, panicle length, grain number and yield, decreased seed weight, % floaters, flour particle size and gel spreading. The results revealed that most of the agronomic and grain quality characters were highly influenced by additive gene action. (...).
GGE Biplot Analysis
| Author | : Weikai Yan |
| Publisher | : CRC Press |
| Total Pages | : 287 |
| Release | : 2002-08-28 |
| Genre | : Mathematics |
| ISBN | : 1420040375 |
Research data is expensive and precious, yet it is seldom fully utilized due to our ability of comprehension. Graphical display is desirable, if not absolutely necessary, for fully understanding large data sets with complex interconnectedness and interactions. The newly developed GGE biplot methodology is a superior approach to the graphical analys
An Evaluation of Early Generation Testing for Combining Ability of Restorer Lines in Grain Sorghum
| Author | : Darrell Thaine Rosenow |
| Publisher | : |
| Total Pages | : 150 |
| Release | : 1970 |
| Genre | : |
| ISBN | : |
The effectivinese of early generation testing for combinig ability for grain yield in grain sorghum restorer lines was studied at College Station, Texas, Two well-Known restorer lines, TX 7078 and TX 09, were crossed and resulting F@, F$, and F^ segregates were evaluated for combining ability. In the F2 population, 70 F2 plants were crossed to each of four male-sterile lines, A Tx 3197 (Combine Kafir-60), A Tx 398 (Martin), A Tx 378 (Redlan), and A Tx 3048 (Redbine sel.). These "F2 hybrids" were grown in a replicated test in 1962. Based on the mean yield of the four hybrids with each F2, 12 high- and 12 low-combining F2's were selected for advancement to the F4 generation. The F4 lines from each of these 24 selected F2's were crossed to each of the same four male-steriles and the hybrids tested in 195=63. Three high-and three low-combining F2 families were closen for further study in the F6. The F6 lines were crossed of the same four male-steriles and the hybrids tested in 1964. By compring, within families, the yield of "F2 hybrids" with the yield of "F4 hybrids" and "F6 hybrids, the effectiveb=ness of early generation testing for combining ability was estimated. High-combining F2's produced F4 lines and F6 lines that were significantly higher in combining ability than the F4 and F6 lines derived from low-combining F2's. Correlation coefficients for yield between "F2 hybrids" and "F4 hybrids', F2 hybrids" and "F6 hybrids"' and "F4 hybrids" and F6 hybrids" were generally large, positive, and significant (...).
