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Effects of in vitro polyploidization on agronomic characteristics and fruit carotenoid content; implications for banana genetic improvement

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Title Effects of in vitro polyploidization on agronomic characteristics and fruit carotenoid content; implications for banana genetic improvement
 
Creator Amah, D.
Biljon, A. van
Maziya-Dixon, B.B.
Labuschagne, Maryke T.
Swennen, Rony L.
 
Subject bananas
genetic improvement
carotenoids
induced polyploidy
diploids
retinol
pollen
viability
 
Description Open Access Journal
Bananas (Musa spp.), native to South East Asia, have spread worldwide and are integrated into the diets of millions of people in tropical regions. Carotenoid content varies dramatically between different banana genotypes, providing an opportunity for vitamin A biofortification. Polyploidization is a useful tool for crop improvement with potential to generate new diversity, especially in a polyploid crop like bananas. Ten induced tetraploids generated from six diploid banana genotypes were evaluated for their agronomic attributes and fruit carotenoid content in comparison to their diploid progenitors. Tetraploids had distinct plant morphology, but generally displayed inferior vegetative and yield characteristics with 20% lower bunch weights than their original diploids. Similarly, a 50% decrease in fruit provitamin A carotenoids (α-carotene, 13-cis β-carotene, 9-cis β-carotene, trans-β-carotene) accompanied by a corresponding increase in lutein was recorded in induced tetraploids in comparison to their original diploids. Additionally, all lines were subjected to pollen viability tests to assess their fertility. Pollen viability tests indicated over 70% viability for induced tetraploids and diploid controls, suggesting their possible use in crosses. These findings provide a basis for the application of induced polyploidization in bananas to generate useful genetic material for integration in hybridization programmes aiming to produce vitamin A enriched triploids valuable to malnourished populations.
 
Date 2019-11-12
2019-11-14T15:13:58Z
2019-11-14T15:13:58Z
 
Type Journal Article
 
Identifier Amah, D., van Biljon, A., Maziya-Dixon, B., Labuschagne, M.T. & Swennen, R. (2019). Effects of in vitro polyploidization on agronomic characteristics and fruit carotenoid content; implications for banana genetic improvement. Frontiers in Plant Science, 10: 1450, 1-12.
1664-462X
https://hdl.handle.net/10568/105740
https://doi.org/10.3389/fpls.2019.01450
BIOTECH & PLANT BREEDING
NUTRITION & HUMAN HEALTH
 
Language en
 
Rights CC-BY-4.0
Open Access
 
Format 1-12
application/pdf
 
Publisher Frontiers Media
 
Source Frontiers in Plant Science