Effects of In Vitro Polyploidization on Agronomic Characteristics and Fruit Carotenoid Content; Implications for Banana Genetic Improvement

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...

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Published inFrontiers in plant science Vol. 10; p. 1450
Main Authors Amah, Delphine, van Biljon, Angeline, Maziya-Dixon, Bussie, Labuschagne, Maryke, Swennen, Rony
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LanguageEnglish
Published Frontiers Media S.A 12.11.2019
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Abstract 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.
AbstractList 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.
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.
Author van Biljon, Angeline
Labuschagne, Maryke
Maziya-Dixon, Bussie
Swennen, Rony
Amah, Delphine
AuthorAffiliation 6 Department of Biosystems, KU Leuven , Heverlee , Belgium
2 Department of Plant Sciences (Plant Breeding), University of the Free State , Bloemfontein , South Africa
1 Plantain and Banana Improvement Program, International Institute of Tropical Agriculture , Ibadan , Nigeria
3 Food and Nutrition Sciences Laboratory, International Institute of Tropical Agriculture , Ibadan , Nigeria
4 International Institute of Tropical Agriculture, The Nelson Mandela African Institution of Science and Technology , Arusha , Tanzania
5 Laboratory of Tropical Crop Improvement, Bioversity International , Heverlee , Belgium
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– name: 4 International Institute of Tropical Agriculture, The Nelson Mandela African Institution of Science and Technology , Arusha , Tanzania
– name: 3 Food and Nutrition Sciences Laboratory, International Institute of Tropical Agriculture , Ibadan , Nigeria
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Edited by: Inaki Hormaza, Institute of Subtropical and Mediterranean Hortofruticultura La Mayora (IHSM), Spain
Reviewed by: Katarzyna Glowacka, University of Nebraska-Lincoln, United States; Patrick Ollitrault, Unité Mixte de Recherche Amélioration Génétique et Adaptation des Plantes (UMR Agap) Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD), France
This article was submitted to Plant Breeding, a section of the journal Frontiers in Plant Science
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Snippet 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...
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...
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StartPage 1450
SubjectTerms banana genetic improvement
biofortification
carotenoid content
diploid bananas
in vitro polyploidization
Plant Science
vitamin A
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Title Effects of In Vitro Polyploidization on Agronomic Characteristics and Fruit Carotenoid Content; Implications for Banana Genetic Improvement
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