Effect of low temperature stress on field performance of highland sorghum (Sorghum bicolor (L.) Moench) at flowering stages
Loading...
Date
2020
Journal Title
Journal ISSN
Volume Title
Publisher
Journal of Plant Breeding and Crop Science
Abstract
Sorghum is a C4 grass native in the semi-arid environments of the African sub-Saharan and
consequently chilling stress can affect the performance of the crop, especially at the reproductive
stages. Moreover, a significant delay of flowering and maturity was observed when sorghum grows
under low temperatures regions, and consequently farmers in highland areas of Uganda face yield
penalties. Forty genotypes were evaluated in 2017B and 2018A seasons under non-stress (Kabanyolo)
and cold stress (Kachwekano and Zombo) field conditions. Data were recorded on: Days to 50%
flowering, days to physiological maturity, culm height, panicle length, panicle weight, kernel weight per
panicle, and thousand grain weight. Mean comparison of most agronomic traits recorded indicated high
significant differences for season-by-genotype, location-by-genotypes, and the three-way interaction
(GxLxS). This indicates that cold stress significantly affects yield components. Significant positive
correlation was obtained between days to 50% flowering, days to maturity, and culm height, which
suggested that simultaneous improvement of these traits is possible. Some genotypes (IESV 91003LT,
IESV 91105LT and IS 29376) were best ranked in normal environment but poorly performed in cold
environments, which indicates lack of adaptation in highland. BM6, Cytanobe, IESV 91018, IESV 91609,
IS 25563 showed generally good performance and stability in all locations. Therefore, these genotypes
can be used as parental lines for further breeding process.
Description
Keywords
Sorghum, Cold stress, Flowering, Maturity, Yield component
Citation
Rutayisire, A., Mukayiranga, A., Habineza, J. C., Avosa, M., Edema, R., & Lubadde, G. (2020). Effect of low temperature stress on field performance of highland sorghum (Sorghum bicolor (L.) Moench) at flowering stages. Journal of Plant Breeding and Crop Science, 12(1), 25-33. DOI: 10.5897/JPBCS2019.0844