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Traits that define yield and genetic gain in East African highland banana breeding

Batte, Michael and Batte, Michael and Swennen, Rony and Uwimana, Brigitte and Akech, Violet and Brown, Allan and Geleta, Mulatu Dida and Ortiz Rios, Rodomiro Octavio (2021). Traits that define yield and genetic gain in East African highland banana breeding. Euphytica. 217 , 193
[Research article]

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Abstract

East African highland bananas (Musa spp. AAA group) are an important staple in the Great Lakes region of East Africa. Their production has declined due to pests and diseases. Breeding for host plant resistance is a sustainable option for addressing this challenge. Understanding the relationships between growth parameters and bunch weight (i.e., yield) is crucial to guide breeding efforts for this crop. We investigated cause-effect relationships, through path analysis, in bunch weight of East African highland banana derived hybrids, their parents and grandparents. These family structures were planted in a 7 x 8 rectangular lattice design, replicated twice. Genetic gains for bunch weight (kg plant(-1)) and yield potential (t ha(-1) year(-1)) were estimated. Significant increases of bunch weight and yield potential were noted from the landrace triploid germplasm, their derived primary tetraploid hybrids and secondary triploid bred-germplasm. Path analysis revealed that fruit length, circumference and number, number of hands and plant cycle number had a direct positive effect on the bunch weight. Days to fruit filling, days to maturity and index of non-spotted leaves had indirect effects on bunch weight. The average genetic gains for bunch weight and yield potential were 1.4% and 1.3% per year, respectively. This is the first report about genetic gains in banana breeding. Our findings may be useful for assessing progress and directing future breeding efforts in banana breeding.

Authors/Creators:Batte, Michael and Batte, Michael and Swennen, Rony and Uwimana, Brigitte and Akech, Violet and Brown, Allan and Geleta, Mulatu Dida and Ortiz Rios, Rodomiro Octavio
Title:Traits that define yield and genetic gain in East African highland banana breeding
Series Name/Journal:Euphytica
Year of publishing :2021
Volume:217
Article number:193
Number of Pages:10
Publisher:SPRINGER
ISSN:0014-2336
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Genetics and Breeding
Keywords:Bunch weight, East African highland bananas, Path analysis, Path coefficient, Yield potential
URN:NBN:urn:nbn:se:slu:epsilon-p-113860
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113860
Additional ID:
Type of IDID
DOI10.1007/s10681-021-02920-x
Web of Science (WoS)000698945300002
ID Code:25574
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Plant Breeding (from 130101)
Deposited By: SLUpub Connector
Deposited On:07 Oct 2021 13:25
Metadata Last Modified:07 Oct 2021 13:31

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