Black Sigatoka Disease Indices and Responses of Hand & Open Pollinated Diploid & Tetraploid Banana & Plantain Genotypes
- September 18, 2020
- Posted by: RSIS Team
- Categories: IJRIAS, Soil Science and Land Resources Management
International Journal of Research and Innovation in Applied Science (IJRIAS) | Volume V, Issue III, January 2020 | ISSN 2454–6186
Victoria WILSON1*, Abdou TENKOUANO2
1Department of Plant Science and Biotechnology, Rivers State University, PMB 5080, Port Harcourt, Rivers State, Nigeria
2Executive Director of CORAF /West and Central African Council for Agricultural Research and Development, Dakar Senegal
*Corresponding author
Abstract- This study was conducted to investigate the black sigatoka disease indices (BSI) of hand and open pollinated 2x and 4x banana and plantain progenies under naturally occurring infection with a view to identifying resistant genotypes and to ascertain how BSI affects vegetative and yield components. Thirty six banana and plantain genotypes, comprising 6 2x and 6 4x parental clones, 6 2x hand pollinated and, 6 2x open pollinated progenies, 6 4x hand pollinated progenies and 6 4x open pollinated progenies were planted using a randomised complete block design with two replications of six plants per genotype. Data collected were total number of leaves produced, number of standing leaves at flowering, number of youngest leaf showing necrotic spots due to black sigatoka disease at flowering, plant height, plant girth, height of tallest following sucker; bunch weight, number of hands per bunch, number of fingers per bunch and yield. Leaf Retention Index (LRI) and Black Sigatoka Index (BSI) were estimated. Data were subjected to analysis of variance and means compared by LSD test at P ≥ 0.05. There were significant differences (P > 0.05) in total number of leaves, number of standing leaves, number of youngest leaf showing necrotic spots, plant height, plant girth, height of tallest following sucker; bunch weight, number of hands per bunch, number of fingers per bunch and yield by some 2x and 4x parental clones and one or other of their progenies. In tetraploids, plant height was significantly associated with BSI (r = 0.502*), height of tallest following sucker (r = 0.534*), bunch weight (r = 0.551*) and yield (r = 0.477*). The diploids TMB2x 8084-2OP and TMB2x 8084-2HP showed potential of being good black sigatoka resistant genotype whereas high yielding tetraploids with good black sigatoka resistance were parental clones TMP4x 7002-1CL, TMP4x 1658-4CL and TMP4x 7152-2CL.
Keywords: – Musa spp, parental clones, necrosis, naturally occurring infection, vegetative traits, yield components
