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Genotype × environment interaction and selection for drought adaptation in sweetpotato (Ipomoea batatas [L.] Lam.) in Mozambique

Andrade, Maria I. and Naico, Abdul and Ricardo, José and Eyzaguirre, Raúl and Makunde, Godwill S. and Ortiz Rios, Rodomiro Octavio and Grüneberg, Wolfgang J. (2016). Genotype × environment interaction and selection for drought adaptation in sweetpotato (Ipomoea batatas [L.] Lam.) in Mozambique. Euphytica. 209:1, 261-280
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Official URL: http://dx.doi.org/10.1007/s10681-016-1684-4

Abstract

Sweetpotato is grown throughout the year in Mozambique but drought affects storage root yield and biomass productivity. The objectives of this research were to estimate the impact of genotype × environment interactions (G × E) in sweetpotato and select genotypes based on drought indices such as geometric mean, percent yield reduction, drought sensitivity index and harvest index. A total of 58 clones were evaluated during the dry season of 2006, 2008 and 2009. Two treatments were applied for this multi-year trial: full irrigation and without irrigation at the middle of root initiation growth stage. The field layout was a randomized complete block design with three replications. ‘Jonathan’, ‘Resisto’ and ‘Tanzania’ were the check cultivars in each treatment. Storage root and vine yields were recorded at harvest in the trials. Harvest index was computed from the yield data. The analysis of variance, regression and the additive main effects multiplicative interaction (AMMI) analyses, plus phenotypic coefficient of variation and ecovalence were used for dissecting the G × E and assessing the stability of each clone. Treatment, genotype × reatment and genotype year (G × Y) interactions had highest contributions to the variation in storage root yield observed among clones. The stability of harvest index was significantly correlated with the absolute AMMI’s IPCA1 and IPCA2 values for storage root yield. Cultivar performance varied within treatments. Four clones had significantly higher storage root yield (t ha-1 ) than ‘Tanzania’, the best check cultivar under drought. In conclusion, storage root yield (t ha-1 ) was negatively affected by drought and G × Y interaction. Harvest index stability and the geometric mean may be key to identify clones with storage root yield stability and high storage root yield under both treatments. At least two environments should be used at early breeding stages to consider harvest index in the early breeding cycle.

Authors/Creators:Andrade, Maria I. and Naico, Abdul and Ricardo, José and Eyzaguirre, Raúl and Makunde, Godwill S. and Ortiz Rios, Rodomiro Octavio and Grüneberg, Wolfgang J.
Title:Genotype × environment interaction and selection for drought adaptation in sweetpotato (Ipomoea batatas [L.] Lam.) in Mozambique
Series/Journal:Euphytica (0014-2336)
Year of publishing :2016
Volume:209
Number:1
Page range:261-280
Number of Pages:20
Publisher:Springer
ISSN:0014-2336
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:F Plant production > F30 Plant genetics and breeding
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Genetics and Breeding
Agrovoc terms:sweet potatoes, genotype environment interaction, drought tolerance
Keywords:Additive main effects multiplicative interaction, Biomass, Drought sensitivity index, Ecovalence, Regression, Stability, Storage root yield, Vine, Water deficit
URN:NBN:urn:nbn:se:slu:epsilon-e-3604
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-3604
Additional ID:
Type of IDID
Web of Science (WoS)000374854100022
ID Code:13565
Faculty:LTV - Fakulteten för landskapsarkitektur, trädgårds- och växtproduktionsvetenskap
Department:(LTJ, LTV) > Department of Plant Breeding (from 130101)
Deposited By: SLUpub Connector
Deposited On:18 Aug 2016 11:44
Metadata Last Modified:18 Aug 2016 11:44

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