Screening cassava genotypes in two agroecological zones of Nigeria using tuberous root poundability

Twelve cassava genotypes were evaluated in two agroecological zones (Ibadan: 25 ± 5 oC and Jos: 14 ± 5 oC) to determine the tuberous root poundability at 3, 6, 9 and 12 months after planting (MAP). The resultsshowed that there were no significant differences (

Evaluation of twelve cassava genotypes in derived Guinea Savanna agroecological zones of Nigeria

Cultivar adaptability trials were conducted for two years in two different locations of derived guinea savanna agroecological zones of Nigeria, Ibadan (07' 22°E, 03' 55°N, temperature 27°C, relative humidity:60-80%, rainfall: 1308 mm), and Ilorin (08' 30°E, 04' 46°N, temperature 28°C, relative humidity 60-80%, rainfall 1050 mm) using 12 cassava genotypes. Data collected included number of tuberous root yield, shoot weight and harvest index. The results showed significant differences (P < 0.05) in cassava genotype performance among the environments (Ilorin, 1992/93; Ilorin 1993/94; Ibadan, 1992/93, Ibadan, 1992/93, Ibadan, 1993/94) for number of tuberous roots, shoot weight, fresh tuberous yield and harvest index. Cassava genotypes grown at Ilorin, 1993/94 had the highest mean values for the number of tuberous roots, fresh tuberous root yield, shoot weight and harvest index at 12 months after planting. Genotypic differences were observed across locations and years for tuberous root number, fresh cassava tuberous root yield shoot weight and harvest index. In across locations and years, TMS 30572, TMS 81/01635, TMS 82/00058 and TMS81/00110 had the highest mean values for total tuberous root number, shoot weight, fresh tuberous of tuberous root yield, shoot weight and harvest index. The results showed significant differences (P < 0.05) in cassava genotype performance among the environments (Ilorin, 1992/93; Ilorin 1993/94; Ibadan, 1992/93, Ibadan, 1992/93, Ibadan, 1993/94) for number of tuberous roots, shoot weight, fresh tuberous yield and harvest index. Cassava genotypes grown at Ilorin, 1993/94 had the highest mean values for the number of tuberous roots, fresh tuberous root yield, shoot weight and harvest index at 12 months after planting. Genotypic differences were observed across locations and years for tuberous root number, fresh cassava tuberous root yield shoot weight and harvest index. In across locations and years, TMS 30572, TMS 81/01635, TMS 82/00058 and TMS81/00110 had the highest mean values for total tuberous root number, shoot weight, fresh tuberous root yields and harvest index respectively. In Ibadan, TMS 82/00058 and TMS 91934 had the highest values for parameter measured whereas in Ilorin, TMS 30572, TMS 82/00058, TMS 81/01635 and TMS 81/00110 performed better than other genotypes tested. Stability analyses were carried out on fresh tuberous root yield. When all the rank sums were summed for each genotype used as a parameter for stability, the result showed that for tuberous root yield, TMS 82/00942, TMS 82/00058 and TMS 30572 could be the most stable genotypes for the derived guinea savanna ecology. TMS 30572 has been widely adopted in some parts of these areas. TMS 82/00942 and TMS 82/00058 are new genotypes which are promising for distribution to farmers in derived guinea savanna ecology. Journal of Agriculture, Science and Technology Vol. 8 (1) 2006: pp. 92-10

Growth response of maize (Zea mays L.) to gas flaring in Delta State

No Abstract. Global Journal of Pure and Applied Sciences Vol. 12 (4) 2006: 457-45

Effect of different temperature regimes on physiological changes associated with early growth of cassava stem cuttings

No Abstract Available Discovery and Innovation Vol.15(3&4) 2003: 150-15

Cassava Growth And Development In Two Contrasting Environments Of Ibadan And Jos

Twelve cassava (improved and local) genotypes were grown at two locations in Nigeria (Ibadan and Jos). Leaf area development and dry matter partitioning were studied from 1994 to 1996. Destructive samplings for growth analyses were done at 3, 6, 9 and 12 months after planting (MAP). Genotype, environment and genotype x environment effects were significant for leaf area index (LAI), total dry matter and total dry tuberous root weight. At Ibadan, LAI was 3.6 and 2.1 at 6 and 12 MAP, respectively, while at Jos LAI values of 0.5 and 2.0 were recorded at 6 and 12 MAP, respectively, in the 1994/1995 planting season. Dry matter production and total dry tuberous root weight were significantly less at Jos than at Ibadan. This was attributed to the lower temperature regime and reduced solar radiation levels recorded at Jos plateau. Patterns of dry matter partitioning to the leaves, shoots and roots were similar in both locations. Dry matter partitioning to the roots was controlled by plant age and solar radiation while dry matter partitioning to the leaves was a function of plant age and temperature. These results indicate that dry matter partitioning of cassava to the roots and leaves are dependent upon solar radiation and temperature in higher altitudes. The data may be useful for validation of models of cassava growth being designed for higher altitudes. Agro-Science Vol.2(1) 2001: 67-7

Genotype X environment effects on cassava response to the african cassava mosaic disease in derived guinea savannah of Nigeria

No Abstract.Global Journal of Agricultural Sciences Vol. 7 (2) 2008: pp.111-11

HEAVY METAL CONTENTS OF MAIZE (Zea mays L.) GROWN IN CRUDE OIL CONTAMINATED SOIL

Several research works have been carried out on crude oil pollution effects on crop plants. There is however, a dearth of information on the heavy metal contents of maize, a principal cereal food crop in the Niger Delta area - the hub of oil industrial activities in Nigeria. This study investigated the effects of crude oil contaminated soil on the heavy metal contents of maize. The study was conducted in Asaba and Ozoro locations of Delta State. Open pollinated AMATZBR w maize variety was used. The experiment was laid out in a split-plot design replicated four times. Fivecrude oil concentrations (0 ml, 5.2 ml, 10.4 ml, 20.8 ml and 41.6 ml) applied five weeks after planting (5 WAP) constituted treatments. The study locations formed the main plots and the oil levels, the sub-plots. Maize grain was harvested at 14 WAP, shelled and analysed for heavy metal contents. Soil physical properties were also analysed from composite soil samples. The results showed that oil treatment had no significant (

Rooting for cassava:insights into photosynthesis and associated physiology as a route to improve yield potential

(Table presented.). Summary: As a consequence of an increase in world population, food demand is expected to grow by up to 110% in the next 30–35 yr. The population of sub-Saharan Africa is projected to increase by > 120%. In this region, cassava (Manihot esculenta) is the second most important source of calories and contributes c. 30% of the daily calorie requirements per person. Despite its importance, the average yield of cassava in Africa has not increased significantly since 1961. An evaluation of modern cultivars of cassava showed that the interception efficiency (ɛi) of photosynthetically active radiation (PAR) and the efficiency of conversion of that intercepted PAR (ɛc) are major opportunities for genetic improvement of the yield potential. This review examines what is known of the physiological processes underlying productivity in cassava and seeks to provide some strategies and directions toward yield improvement through genetic alterations to physiology to increase ɛi and ɛc. Possible physiological limitations, as well as environmental constraints, are discussed. © 2016 The Authors. New Phytologist © 2016 New Phytologist Trus