Quantifying photothermal influences on reproductive development in bambara groundnut (Vigna subterranea): models and their validation

Performances agro-morphologiques des varietes locales et ameliorees de maïs au sud-ouest du Niger

“…Ces variations phénotypiques sont certainement dues à des différences entre les génotypes (transmissibles de génération en génération) sans négliger les effets de l'environnement (température, humidité relative, fertilisation, etc). En effet, de nombreux travaux ont montré que la longueur du jour (Harris et Azam-Ali, 1993;Linnemann et al, 1995;Brink, 1999), la température (Linnemann et Craufurd, 1994;Brink, 1998) et l'humidité relative (Collinson et al, 1996) (maïs jaune corné). La transition de l'inflorescence mâle à l'inflorescence femelle occupe un intervalle de temps de 3 à 9 jours selon les variétés.…”

Bambara groundnut: an exemplar underutilised legume for resilience under climate change

“…In bambara groundnut landrace "Ankpa-4", fertilisation was observed, and healthy embryos were found to have developed in ovaries up to 32 days after anthesis under a photoperiod of more than 14 h (Linnemann 1993). This evidence suggests that any embryo abortion and the lack of pod-development in bambara groundnut during long photoperiods is primarily caused by the deficiency of or competition for photoassimilates and nutrients among vegetative and reproductive sink organs (Linnemann and Craufurd 1994;Brink 1997;Brink et al 2000). The quantitative response in terms of pod and seed number to increased duration of the critical period due to photoperiodic effects is not very well understood.…”

“…By contrast, flowering in other species such as rice (Oryza sativa), cowpea, soybean, and common bean (Phaseolus vulgaris) is promoted by short daylengths (Summerfield et al 1991;Summerfield et al 1993;Song et al 2010). Besides the onset of flowering, several other aspects of reproductive development such as pod and seed yield, and seed filling are influenced by photoperiod, and these are perhaps the most important agronomic traits for agricultural research and policy (Guiamet and Nakayama 1984;Morandi et al 1988;Bagnall and King 1991a;Harris and Azam-Ali 1993;Linnemann et al 1995;Brink 1997;Brink 1998;Brink et al 2000;Nico et al 2015). Therefore, an understanding of the photoperiodic and genetic control of pod set and its relationship with seed production may become potential tools to further raise the yield of bambara groundnut.…”

Genetic diversity and population structure of Bambara groundnut (Vigna subterranea (L.) Verdc.): synopsis of the past two decades of analysis and implications for crop improvement programmes

“…Moreover, a highly controlled environment is needed for such phenotyping in most ecologies (especially in the tropical regions where natural day length variation is limited). However, studies focusing on photothermal response mechanisms in Bambara groundnut have been reported (Linnemann 1991;Linnemann et al 1995;Brink 1997Brink , 1999Brink et al 2000;Jørgensen et al 2009;Kendabie et al 2014). The opportunity to use molecular markers linked to QTLs associated with photo-thermal response could be useful in future germplasm characterization.…”