Article Sidebar
Published:
Mar 30, 2024Keywords:
Article Details
This work is licensed under a Creative Commons Attribution 4.0 International License.
NAJ supports free online communication and exchange of knowledge as the most effective way of ensuring that the fruits of research and development practice are made widely available. It is therefore committed to open access, which, for authors, enables the widest possible dissemination of their findings and, for readers, increases their ability to discover pertinent information. The Journal adopts and uses the CC: BY license and is open access. This license lets others distribute, remix, adapt, and build upon your work, even commercially, as long as they credit you for the original creation. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the Journal’s published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work. Copyright for articles published in this Journal is retained by the Journal.
Main Article Content
Analysis of Multi-Environment Yield Traits of Selected Provitamin-A cassava genotypes using GGE Biplot
Abstract
Ten yellow-fleshed cassava genotypes and two released cassava varieties (check) were evaluated in two agroecological zones of Nigeria to assess their yield performance, agronomic parameters and genotypes by environment interaction effects. The study was conducted in 2017 and 2018 cropping seasons at Umudike (humid rainforest) and Otobi (derived savanna), in a randomized complete block design (RCBD) with three replications. The combined analysis of variance revealed that there were significant differences among the genotypes for root number (RTNO), root weight (RTWT) and cassava mosaic disease severity (CMDS). There was a significant difference for cassava anthracnose disease severity (CADS) and genotype x environment interaction for cassava mosaic disease severity (CMDS) at P<0.001. Similarly, highly significant differences were also observed across locations, among genotypes for fresh root yield (FRY), dry matter content (DMC), dry root yield (DRY) and significant genotype x environment interaction for DMC and DRY; across locations for DMC and DRY at P<0.001. The convex-hull drawn from the biplot origin gave 4 sectors with NR070220, NR150025, NR150008 and NR150014 as the vertex cultivars. NR070220 was the vertex and the winning variety in Umudike. NR150025 was the winner in the second mega-environment at Otobi while NR150008 and NR150014 were winners in both (Umudike and Otobi) meaning that these cultivars are the best in these environments. Genotype NR150025 had the highest FRY of 30.30 t/ha while the lowest value of 3.20 t/ha was recorded for genotype NR150040. Genotype NR150113 had the higher DMC of 37.93% while genotype NR150105 recorded the lowest DMC of 18.13%. Genotypes NR150113, NR150008 and NR150025 had the highest DMC, five genotypes had DMC higher than the mean. Also, six genotypes had root yield better than the check indicating the need to promote such genotypes in the breeding cycle.
