Evaluation of banana germplasm and genetic analysis of an F 1 population for resistance to Fusarium oxysporum f. sp. cubense race 1

TitleEvaluation of banana germplasm and genetic analysis of an F 1 population for resistance to Fusarium oxysporum f. sp. cubense race 1
Publication TypeJournal Article
Year of Publication2019
AuthorsArinaitwe IKabiita, Teo CHow, Kayat F, Tumuhimbise R, Uwimana B, Kubiriba J, Swennen R, Harikrishna JAnn, Othman RYasmin
JournalEuphytica
Volume215
Pagination175
Abstract

Abstract :
Fusarium wilt of bananas (Musa spp.), caused by Fusarium oxysporum f. sp. cubense (Foc) causes up to 100% yield loss in bananas. Foc race 1 in particular is very devastating to dessert bananas in Uganda. One of the effective control strategies for the disease is the development of resistant cultivars through breeding. The objectives of this study were to identify suitable banana germplasm for generating a segregating population for resistance to Foc race 1 and understand the mode of inheritance of resistance to Foc race 1. Twenty-two banana accessions sourced from the National Agricultural Research Organisation in Uganda were challenged with Foc race 1 in a screen house experiment. Monyet, resistant to Foc race 1 and Kokopo, susceptible, were selected and crossed to generate 142 F1 genotypes. These F1 genotypes were also challenged with Foc race 1 in a screen house experiment. Data were collected on rhizome discoloration index (RDI), leaf symptom index (LSI) and pseudo-stem splitting (PSS), and analysed for variability. The banana accessions evaluated showed varying degrees of resistance to Foc race 1. Segregation ratios for resistant versus susceptible progenies fitted 13:3 (χ2 = 0.12, P = 0.73) for RDI and 11:5 (χ2 = 3.04, P = 0.08) for PSS. Estimated broad sense heritability was 27.8% for RDI, 13.9% for LSI and 14.7% for PSS. The results suggest that resistance to Foc race 1 in banana is controlled by at least two dominant genes with epistatic interaction and that heritability of resistance to Foc race 1 is low in Musa spp.

DOI10.1007/s10681-019-2493-3
Link to PDF file in the Musalit bibliographic database: 
Showing 10 of 10 accessions
Accession Name Pictures Accession number Species / Group SubSpecies / SubGroup Origin Collection Available for distribution
Pisang Lilin ITC1121 AA Unknown Unknown ITC
Long Tavoy ITC0093 acuminata subsp. burmannica Unknown ITC
Calcutta 4 ITC0249 acuminata subsp. burmannicoides Unknown ITC
Zebrina (G.F.) ITC0966 acuminata subsp. zebrina Unknown ITC
Kokopo ITC1243 AA Unknown Papua New Guinea ITC
Borneo ITC0253 acuminata subsp. microcarpa Unknown ITC
Kasaska ITC0591 AA Unknown Papua New Guinea ITC
CIRAD 930
ITC1511 acuminata subsp. malaccensis Guadeloupe ITC
Kahuti
ITC1468 AA subgr. Mshare Tanzania ITC
Monyet
ITC1179 acuminata subsp. zebrina Unknown ITC
Evaluation traits: