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Research article - Peer-reviewed, 2020

Ten Year Progression of Musa Breeding from 1987 to 1997: 1. Pollination Success and Seed Production (Fecundity) Patterns among Multiple Ploidy Crosses

Wilson, V.; Tenkouano, Abdou; Wilson, G.F.; Swennen, Rony; Vuylsteke, D.; Ortiz, Rodomiro; Crouch, J.H.; Crouch, H.K.; Gauhl, F.; Pasberg-Gauhl, C.; Austin, P.D.;

Abstract

Aims: To create genetic variability, produce seeds and ultimately develop disease resistant and agronomically desirable hybrids with good organoleptic quality bunches. Study Design: Multiple hand pollinations/ crosses in possible combinations of 2x, 3x and 4x as maternal/ seed and paternal/ pollen parents. Place and Duration of Study: International Institute of Tropical Agriculture High Rainfall Station (IITA), Onne, Rivers State, Nigeria. 1987 to 1997. Methodology: Utilizing over 320 landraces, varieties, cultivars, clones/ genotypes and IITA accessions obtained from plantain and banana growing regions worldwide, scientists performed numerous hand pollinations/ crosses in possible combinations of 2x, 3x and 4x as maternal/ seed and paternal/ pollen parents every day. Results: There were significant differences (P=.05) in number of seeds produced when diploids were used as maternal parents. Overall, 2x-2x produced 11times more seeds than the 2x-3x, and 54times more seeds than the 2x-4x. The 2x-2x crosses had double seed production maxima when crosses took place in June and July (8,300 seeds) and August and November (6,200 seeds) indicating a high level of fecundity. Only 2x-2x showed significantly positive correlation between seed production and pollination success (r = 0.617*). When triploids were maternal parents, there were significant differences (P=.05) in number of seeds produced. On average, 3x-2x produced 4times the number of seeds obtained from 3x-3x and 27times more than 3x-4x crosses. Seed production from triploids was 32times less than from diploids. The 3x-3x exhibited positively significant correlation between seed production and pollination success (r = 0.595*). With tetraploid maternal parents, there was significant difference (P=.05) in seed production when the male parent was diploid. High seed production (3,000-4,000) was achieved when pollination took place from June to October in the 4x-2x crosses. Seed production and pollination success in the 4x-2x were positively and highly significantly correlated (r = 0.865**). Conclusion: In all crosses, diploid males produced the most seeds and pollination success increased as ploidy of maternal parent increased from diploid to tetraploid especially with diploid males.

Keywords

genetic improvement; genome composition; ploidy level; ploidy cross types; maternal/seed parent; paternal/pollen parent

Published in

Asian Journal of Research in Botany

2020, volume: 4, number: 4, pages: 53-67

Authors' information

Wilson, V.
Rivers State University
Tenkouano, Abdou
CORAF
Wilson, G.F.
International Institute of Tropical Agriculture (IITA)
Swennen, Rony
International Institute of Tropical Agriculture (IITA)
Vuylsteke, D.
No organisation
Ortiz, Rodomiro (Ortiz Rios, Rodomiro Octavio)
Swedish University of Agricultural Sciences, Plant breeding and Biotechnology
Crouch, J.H.
KWS UK Ltd
Crouch, H.K.
International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)
Gauhl, F.
International Institute of Tropical Agriculture (IITA)
Pasberg-Gauhl, C.
Tafrilico S.A.
Austin, P.D.
International Institute of Tropical Agriculture (IITA)

UKÄ Subject classification

Agricultural Science
Horticulture
Genetics and Breeding

URI (permanent link to this page)

https://res.slu.se/id/publ/108026