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Crossbreeding East African Highland Bananas: Lessons Learnt Relevant to the Botany of the Crop After 21 Years of Genetic Enhancement

Batte, Michael and Swennen, Rony and Uwimana, Brigitte and Akech, Violet and Brown, Allan and Tumuhimbise, Robooni and Persson Hovmalm, Helena and Dida, Mulatu Geleta and Ortiz Rios, Rodomiro Octavio (2019). Crossbreeding East African Highland Bananas: Lessons Learnt Relevant to the Botany of the Crop After 21 Years of Genetic Enhancement. Frontiers in Plant Science. 10, 1-9
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Abstract

East African highland bananas (EAHB) were regarded as sterile. Their screening forfemale fertility with “Calcutta 4” as male parent revealed that 37 EAHB were fertile. Thiswas the foundation for the establishment of the EAHB crossbreeding programs by theInternational Institute of Tropical Agriculture (IITA) and the National Agricultural ResearchOrganization (NARO) in Uganda in the mid-1990s. The aim of this study was to assessthe progress and efficiency of the EAHB breeding program at IITA, Sendusu in Uganda.Data on pollinations, seeds generated and germinated, plus hybrids selected between1995 and 2015 were analyzed. Pollination success and seed germination percentagesfor different cross combinations were calculated. The month of pollination did notresult in significantly different (P= 0.501) pollination success.Musa acuminatasubsp.malaccensisaccession 250 had the highest pollination success (66.8%), followed by thecultivar “Rose” (66.6%) among the diploid males. Twenty-five EAHB out of 41 studiedfor female fertility produced up to 305 seeds per pollinated bunch, and were thereforedeemed fertile. The percentage of seed germination varied among crosses: 26% for2x×4x, 23% for 2x×2x, 11% for 3x×2x,and 7% for 4x×2x. Twenty-seven NARITAhybrids (mostly secondary triploids ensuing from the 4x×2x) were selected for furtherevaluation in the East African region. One so far –“NARITA 7”– was officially released tofarmers in Uganda. Although pollination of EAHB can be conducted throughout the year,the seed set and germination is low. Thus, further research on pollination conditions andoptimization of embryo culture protocols should be done to boost seed set and embryogermination, respectively. More research in floral biology and seed germination as wellas other breeding strategies are required to increase the efficiency of the EAHB breedingprogram.

Authors/Creators:Batte, Michael and Swennen, Rony and Uwimana, Brigitte and Akech, Violet and Brown, Allan and Tumuhimbise, Robooni and Persson Hovmalm, Helena and Dida, Mulatu Geleta and Ortiz Rios, Rodomiro Octavio
Title:Crossbreeding East African Highland Bananas: Lessons Learnt Relevant to the Botany of the Crop After 21 Years of Genetic Enhancement
Series/Journal:Frontiers in Plant Science (1664-462X)
Year of publishing :2019
Volume:10
Page range:1-9
Number of Pages:9
Publisher:Frontiers
ISSN:1664-462X
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Horticulture
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Genetics and Breeding
Keywords:East African highland bananas, embryo culture, genetic enhancement, Musa acuminata, NARITA cultivars, pollination success, secondary triploids, seed set
URN:NBN:urn:nbn:se:slu:epsilon-e-5208
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-5208
Additional ID:
Type of IDID
DOI10.3389/fpls.2019.00081
ID Code:15887
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Plant Breeding (from 130101)
Deposited By: SLUpub Connector
Deposited On:06 Feb 2019 08:22
Metadata Last Modified:06 Feb 2019 08:22

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