Stability of Solanum aethiopicum Shum accessions under varied water deficit stress levels and identification of pertinent breeding traits for resistance to water shortage
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Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
Euphytica
Abstract
Drought is a major constraint to productivity
of Solanum aethiopicum ‘Shum’ group due to
loss in market and nutrient value of stressed plants.
This study evaluated S. aethiopicum Shum group
accessions to identify genotypes (G) that excel across
moisture deficit stress levels (WLs). A split-plot
arrangement composed of four WLs and twenty
accessions of S. aethiopicum as main plot and subplot
factors, respectively, was implemented in a
screenhouse, and repeated for two experiments. In
each experiment, there was a highly significant effect
of at least two WLs on mean performance among at
least two accessions for most of the traits at p\0.05.
Further, very highly significant WL 9 G interactions
were obtained for leaf relative water content (LRWC),
leaves per plant (LPP) and plant height (PH), and nonsignificant
for leaf blade length and leaf blade width.
The order of priority as breeding traits for stability
superiority across WLs was suggested as
LRWC[PH[LPP. Consequently, based on
LRWC, the most superiorly stable accessions were
identified as accession 160 followed by accessions
145, 137, 108P and 184G while the least stable ones
were identified as accessions 163G, 141, 163 and 108.
The broad sense heritability (H2) for each of the three
recommended traits for drought resistance breeding
was above 0.9 thus supportive for a good response to
selection. Drought stress negatively affected the
performance of S. aethiopicum Shum group but the
exhibited variation allowed for selection of superiorly
stable genotypes.
Description
Keywords
Drought stress, Leafy vegetables, Leaf relative water content, Plant height, Stability superiority
Citation
Sseremba, G., Tongoona, P., Eleblu, J. S. Y., Danquah, E. Y., Kaweesi, T., Baguma, Y., ... & Kizito, E. B. (2018). Stability of Solanum aethiopicum Shum accessions under varied water deficit stress levels and identification of pertinent breeding traits for resistance to water shortage. Euphytica, 214(1), 1-11. https://doi.org/10.1007/s10681-017-2097-8