Preprint and Postprint Journal Articles
Permanent URI for this community
Browse
Browsing Preprint and Postprint Journal Articles by Author "Aba, D. A."
Now showing 1 - 6 of 6
Results Per Page
Sort Options
- ItemAUTOTYPE SORGHUM GRAIN FOR BREWING(2008) Aba, D. A.; Bello, S.A.
- ItemGENETIC VARIABILITY IN PLANT TYPES' OF SORGHUM {Sorghum bicolor (L.) MOENCH) DERIVED FROM GAMMA-RAY IRRADIATION(2002-09) Aba, D. A.; Alabi, S. O.Variability was created in an improved sorghum variety SK 5912 using gamma-ray irradiation (Cobalt source) 60Co. The Mo seeds were advanced to My and from the M3 family selections were made of 34 lines based on medium height, disease free plants and good yields. These were advanced to M4 family lines. The M4 families were harvested and threshed and were divided into three equal portions for evaluation. The materials were evaluated in the Institute for Agricultural Research Farms for three years (1989, 1990 and 1991). The objective was to determine the variations resulting from the gamma-ray irradiation using the multivariate analysis procedure of factor analysis. Fhenotypic correlations were computed for the individual and combined years using the component, of variance and convariances. Principal component analysis, procedure was used to extract factors (TC) that account for the variations in the plant types of sorghum using the twenty two characters evaluated. In 1989 non-reproductive structures (II) photosynthetic) accounted for 5.75% of the total variations in F,, I" leaf sheath, Td intcrnode length, accounted for 2.24% of the total variation in F2. In 1990, the same nonreproductive structures (12) accounted for 5.51% of the total variations in F,, and only the lengths of leaf blades accounted for 2.72% of the variations in F2. In 1991 the lengths of five internodes accounted for 2. 75% of variation in F, while only lengtlis of the four leaf blades accounted for 2.25% of variations in F2. In the combined component analysis lengths of five internodes accounted for 4.96% of the total variation in F,, while lengtlis of three leaf blades, grain wt/spikelet and Days to 50% flowering accounted for 2.60% of the variation in F2. These results are useful in identifying the characters that give much variations and are correlated to the yield attributes, to be selected for in order to improve yield in the plant types, using recurrent selection procedure.
- ItemGENOTYPIC AND PHENOTYPIC VARIANCE AND CORRELATIONS IN S5 LINES OF A PEARL MILLET POPULATION (Pennisetum americanum (L.) Lcckc)(2004-03) Yeye, M. Y.; Aba, D. A.There were 78 S5 lines of a nutlet population evaluated in two locations for two years in 1998 and 1992 using a simple 9x9 lattice design because of the great number of genotypes involved. Mean performance over the two locations were similar for some traits, hut different for certain others. Analysis of variances pooled over the years and locations indicated that genotypic mean square estimates were significant at 1% level of probability for plant height, car length, ear weight and threshing percentage, and at 5% level for grain yield per ear, days to 50% heading and days to 50%, blooming. Over the locations, the estimates were significant at 1% level for noding and threshing percentage. Both negative and positive correlation coefficients were observed and for a larger number of the associations in the population, the genotypic correlation coefficients were slightly higher than the phenotypic. The highest correlation coefficient was obtained between the ear weight and threshing percentage. The tallest plants were also positively correlated with plant noding (rg 0.910). Based on the correlation coefficient obtained in this study, plant nodding and ear characters would be best selection indices for obtaining a high yielding millet population. The closeness between phenotypic and correlation coefficient will render efficient any selection based on the phenotype,
- ItemInfluence of Desiccation Time on Survival and Regeneration of Embryonic Axes of Groundnut {Arachis hypogaea L.) Immersed in Liquid Nitrogen(2013-08) Ahdulmalik, M. M.; Usman, I. S.; Olarewaju, J. D.; Aba, D. A.Cryoprcscrvation, the storage of biological materials in liquid nitrogen (LN), is a useful method for long term conservation of plant germplasin. This study was carried out with the objective of establishing an efficient desiccation technique for successful cryopreservalion and recovery of embryonic axes of groundnut. Rmbryonic axes of four groundnut {Arachis hypugaeu I..) genotypes were evaluated. The excised embryonic axes were dehydrated by air current of a laminar air flow cabinet for different duration (0, I, 2, 3, 4 & 5 hrs) before being plunged in LN (-196°C) and held for 1 hr. Samples were thawed in water bath at 40°C for 2 min, thereafter cultured on MS medium supplemented with 15 mg/L BAP for recovery. Highest survival (96.67% - 100%) and shoot formation (91..67% - 96.67%) were obtained at an average moisture content of 17% after 4 - 5 hr desiccation. Among the genotypes evaluated, Sannut 22 and Sanimit 23 recorded the highest survival and shoot formation, This technique therefore appears promising for cryoprcscrvation of groundnut gennplasm.
- ItemSORGHUMAba, D. A.; Idem, N.UA.; Marley, P. S.; Maigida, D. N.
- ItemVarietal resistance of Sorghum bicolor (L.) Moench to Sporiosorium sorghi Link in Nigeria(1996) Marleyt, P. S.; Aba, D. A.Sorghum genotypes were screened for resistance to Sporiosorium sorghi in the screenhouse and in the field. Scrccnhousc trials showed ICSV 2 and 1CSV 1049 to have considerable resistance while ICSV 1002 was completely immune. Field trials in 1994 and 1995 confirmed them to be resistant.