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Considering effects of temperature and photoperiod on growth and development of lablab purpureus (l.) Sweet in the search of short-season accessions for smallholder farming systems

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Title Considering effects of temperature and photoperiod on growth and development of lablab purpureus (l.) Sweet in the search of short-season accessions for smallholder farming systems
 
Creator Sennhenn, Anne
 
Contributor Odhiambo, Judith
Maass, Brigitte L.
Whitbread, Anthony
 
Subject small scale farming systems
sub saharan africa
accessions
 
Description Legumes have gained increased importance in smallholder farming systems of sub-Saharan Africa due to
their contribution to household nutrition and health and their ability to grow in low fertility soils. With
unpredictable and highly variable rainfall characteristics of the semi-arid areas, short-season grain types
are seen as a promising option for drought avoidance. Knowledge of phenological development and, in
particular, time to flowering is crucial information needed for estimating the possible production success
of new accessions to new environments. The photoperiod-sensitivity of 10 promising short-season Lablab
purpureus (L.) Sweet accessions (CPI 525313, CPI 52533, CPI 52535, CPI 52535, CPI 52552, CPI 52554,
CPI 60795, CPI 81364, CQ 3620, Q 6880B) were evaluated for their response to varying temperature
and daylength regimes in field trials in Limpopo province, South Africa and under controlled conditions
in growth chamber experiments in Göttingen, Germany. Photoperiod sensitivity was quantified using the
triple-plane rate model of flowering response with time to flowering expressed in thermal time (Tt, °Cd).
Additionally, piecewise regression analysis was conducted to estimate the critical photoperiod (Pc) above
which time to flowering was delayed significantly. Relatively high variation of time to flowering amongst
and within accessions in days after planting (DAP) was observed, ranging from 60 to 120 DAP depending
on sowing date or daylength/temperature regime. Furthermore, a clear positive effect of temperature on
growth and development of the tested accessions was found and time to flowering expressed as thermal
time were consistent for the tested accessions, ranging from 600 to 800 °Cd for daylength 110 DAP. The tested lablab accessions are therefore considered photoperiod insensitive,
or weakly photoperiod responsive and are classified as short-day plants (SDP). Since daylength does not
exceed 13 h between the latitudes 30 N to 30 S, these lablab accessions are recommended for further
testing as short-duration grain legumes.
 
Date 2017-07-31
2017-02-04T14:28:35Z
2017-02-04T14:28:35Z
 
Type Journal Article
 
Identifier http://oar.icrisat.org/id/eprint/9729
https://mel.cgiar.org/reporting/download/hash/owpasgID
Anne Sennhenn, Judith Odhiambo, Brigitte L. Maass, Anthony Whitbread. (31/7/2017). Considering effects of temperature and photoperiod on growth and development of lablab purpureus (l. ) Sweet in the search of short-season accessions for smallholder farming systems. Experimental Agriculture, 53 (3), pp. 375-395.
https://hdl.handle.net/20.500.11766/5561
Limited access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher Cambridge University Press (CUP)
 
Source Experimental Agriculture;53,(2016) Pagination 375,395