Relationships Of Certain Morphological Characters With Grain Yield And Quality Of Phenotypically Diverse Lines And Hybrids In Sorghum Bicolor L Moench
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The Relationship Between Phenotypic Values in Male-sterile Sorghum Parents and in Their F1 Hybrids
| Author | : R.R. Muyco |
| Publisher | : |
| Total Pages | : 58 |
| Release | : 1985 |
| Genre | : |
| ISBN | : |
Thirty grain sorghum (Sorghum bicolor (L.) Moench) hybrids were generated by crossing each of ten cytoplasmic male-sterile lines with three diverse tester lines. The parents and their hybrids were grown in four replications at the Central Experiment Station during the 1983-1984 dry season. The study aimed to determine the relationship between the male-sterile parents and their F1 hybrids, identify the appropriate male testers for evaluating the combinig ability of male-seterile parents, and identify sorghum hybrids with potential for comercial use. Agronomic characters measured included grain yield, days to 50% bloming, plant height, 1000-seed weight and average number of seeds per head. The analysis of vriance showed that parental lines as well as their F1 hybrids were all significantly different for the five characters measured. Parental lines contributed a major portion of the total variation. Grain yield was found to be the most heterotic character. Male-sterilie parents were highly correlated with their F1 hybrids for days to 50% blooming, plant height and average number of seeds per head. But F1 hybrids approached their male parent in days to 50% blooming and were generally taller than their parental lines. Correlation values for grain yield and 1000-seed weight were positive but not high enough to be significant. The top yielding male-sterilie lines were positive for general combining ability effects for yield, days to 50% blooming, and average number of seeds per head. These lines were ATX622, (...).
National Agricultural Library Catalog
| Author | : National Agricultural Library (U.S.) |
| Publisher | : |
| Total Pages | : 618 |
| Release | : 1982 |
| Genre | : Agriculture |
| ISBN | : |
Genetic and Environmental Control of Protein Quantity and Quality and Their Relationships with Certain Agronomic Characters in Sorghum (L.) Moench
| Author | : F. C. Collins |
| Publisher | : |
| Total Pages | : 109 |
| Release | : 1969 |
| Genre | : |
| ISBN | : |
Combining ability for grain yield and protein quantity and quality of the grain was investigated in nineteen sorghum lines and in F1 hybrids obtained from certain crosses among the nineteen lines. In 1967 an incompleta diallel was grown which consisted of inbred parents and crosses among 12 lines used as males and four lines used as females. In 1968 a nine parent kialllel was grown which consisted of the parents and one set of F1's. Grain yield, percentage protein, percentage lysine, addition, date of flowering, leaf number, heig ht, flag leaf area index, head exertion, head length, yield per head, and 100 seed weight were examined in the 1968 study. Significant differences among genotypes were found for all characters. Grain yield ranged from 3088 to 15863 Kg/ha, protein varied from 9.18 to 18.22 percent; and the range of lysine was from 1.25 to 2.74 percent. A highly significant general combining ability (GCA) was found only in the 1968 study and it exixtged or every character. Grain yield and percentage lysine had GCA : SCA mean square ratios of less than 10:1 and percentage protein had a 31:1 ratio. Many F1's yielded significantly higher levels of protein than their parents. Among these were hybrids whose parents were superior for yield and protein level. Percentage lysine and yield were unrelated in 1967 but were positively associated in 1968. These results suggest that both additive and non-additive gene action influenced yield, protein, and lysine and that high levels of protein and lysine can be (...).
Quantitative Trait Loci Affecting the Agronomic Performance of a Sorghum Bicolor (L.) Moench Recombinant Inbred Restorer Line Population
| Author | : Jorge Luis Moran Maradiaga |
| Publisher | : |
| Total Pages | : |
| Release | : 2003 |
| Genre | : |
| ISBN | : |
Lately the rate of genetic gain in most agronomic crop species has been reduced due to several factors that limit breeding efficiency and genetic gain. New genetic tools and more powerful statistical analyses provide an alternative approach to enhance genetic improvements through the identification of molecular markers linked to genomic regions or QTLs controlling quantitative traits. The main objective of this research was to identify genomic regions associated with enhanced agronomic performance in lines per se and hybrid combination in Sorghum bicolor (L.) Moench. A population composed of 187 F5:6 recombinant inbred lines (RIL) was derived from the cross of restorer lines RTx430 and RTx7000. Also, a testcross hybrid population (TCH) was developed by using each RIL as a pollinator onto ATx2752. A linkage map was constructed using 174 marker loci generated from AFLP and SSR primer combinations. These markers were assigned to 12 different linkage groups. The linkage map covers 1573 cM with marker loci spaced at an averaged 9.04 cM. In this study, 89 QTL that control variation in seven different morphological traits were identified in the recombinant inbred line population, while in the testcross hybrid population, 79 QTL were identified. These traits included grain yield, plant height, days to mid-anthesis, panicle number, panicle length, panicle exsertion and panicle weight. These putative QTL explained from 4 to 42% of the phenotypic variation observed for each trait. Many of the QTL were not consistent across populations and across environments. Nevertheless, a few key QTL were identified and the source of the positive additive genetics isolated. RTx7000 was consistently associated with better agronomic performance in RIL, while in testcrosses, RTx430 was. Some genomic regions from RTx7000 may be utilized to improve RTx430 as a line per se. However, it is very unlikely that such regions will have a positive effect on the combining ability of RTx430 since testcross results did not reveal any transgressive segregants from the RIL population.
Sorghum
| Author | : Ignacio A. Ciampitti |
| Publisher | : John Wiley & Sons |
| Total Pages | : 528 |
| Release | : 2020-01-22 |
| Genre | : Technology & Engineering |
| ISBN | : 0891186271 |
Sorghum is among the top five cereals and one of the key crops in global food security efforts. Sorghum is a resilient crop under high-stress environments, ensuring productivity and access to food when other crops fail. Scientists see the potential of sorghum as a main staple food in a future challenged by climate change. The contributors provide a comprehensive review of sorghum knowledge. The discussion covers genetic improvements, development of new hybrids, biotechnology, and physiological modifications. Production topics include water and nutrient management, rotations, and pest control. Final end uses, sorghum as a bioenergy crop, markets, and the future of sorghum are presented. IN PRESS! This book is being published according to the “Just Published” model, with more chapters to be published online as they are completed.
