Thirty-one cowpea genotypes from 2000 planting season of derived savanna ecology to determine the genetic diversity, using multivariate analysis. In four location - season environments twenty cultivars were grown to measure genotype x environment interaction and stability. Data were collected on gronomic and yield characters. The first three axes of the Principal Component Analysis (PCA) captureJ 40. 7% or the total variation among the enteries. lleight at flowering and maturity, length of peduncle, number of seed per pod, fresh and dry pod colour, number of days to 50 % flowering and maturity contributed most to the variation. The first three axes of the Canonical and Discriminant analyses respectively summarised 58.9% and 74.5% of the total variations. Canonical analysis identilied seed characteristics, length of branch and maturity period as the most important characters in •' the variations in cowpea accessions. The genotype, environment and GXE interaction accounted for 53.7%, 3.1% and 15.1% of the GXE interaction sum of squares. The first and second interaction PCA accounted for 68.2% and 1.7. % of the total variation; IT97k- 499-39, TVx-3236, LDPD, Owode, IT96K-277-2, Ile-brown, AGRIB VI and IT97k-l 13- 6 had a combination of stable and above average yield and suitable for cultivation across seasons using stability parameters. Unlike the deviation mean square, (S 2 di) and unbiased estimator (8/) more genotypes were adjudged unstable with respect to the characters by the ccovalence mean square (WMS). Deviation mean square, unbiased estimator and WMS identified medino I and II and IT90k-l 034-34 as unstable and hence unsuitabk for cultivation across seasons.
Onye, A (2021). DIVERSITY, SELECTION ANO GENOTYPE X ENVIRONMENT INTERACTION IN COWPEA vigua cmguiculata (L.) \\ 1 ALP. Afribary. Retrieved from https://track.afribary.com/works/diversity-selection-ano-genotype-x-environment-interaction-in-cowpea-vigua-cmguiculata-l-1-alp
Onye, Aremu "DIVERSITY, SELECTION ANO GENOTYPE X ENVIRONMENT INTERACTION IN COWPEA vigua cmguiculata (L.) \\ 1 ALP" Afribary. Afribary, 12 May. 2021, https://track.afribary.com/works/diversity-selection-ano-genotype-x-environment-interaction-in-cowpea-vigua-cmguiculata-l-1-alp. Accessed 24 Dec. 2024.
Onye, Aremu . "DIVERSITY, SELECTION ANO GENOTYPE X ENVIRONMENT INTERACTION IN COWPEA vigua cmguiculata (L.) \\ 1 ALP". Afribary, Afribary, 12 May. 2021. Web. 24 Dec. 2024. < https://track.afribary.com/works/diversity-selection-ano-genotype-x-environment-interaction-in-cowpea-vigua-cmguiculata-l-1-alp >.
Onye, Aremu . "DIVERSITY, SELECTION ANO GENOTYPE X ENVIRONMENT INTERACTION IN COWPEA vigua cmguiculata (L.) \\ 1 ALP" Afribary (2021). Accessed December 24, 2024. https://track.afribary.com/works/diversity-selection-ano-genotype-x-environment-interaction-in-cowpea-vigua-cmguiculata-l-1-alp