Towards understanding the traits contributing to performance of pearl millet open-pollinated varieties in phosphorus-limited environments of West Africa uri icon

abstract

  • AimsPearl millet (Pennisetum glaucum (L.) R. Br.) open-pollinated varieties, which are the predominant cultivars, have never been systematically evaluated for adaptation to low-soil phosphorus (P), a major constraint on pearl millet production in West Africa (WA).MethodsWe evaluated grain yield (GY), flowering time (FLO), harvest index (HI), and residual grain yields (RGY) of 102 open-pollinated varieties from WA under low-P (?P) and high-P (+P) field conditions in six environments of WA. In addition, PE-related traits of the varieties were evaluated at early growth stage in a pot experiment.ResultsSignificant genetic variation was observed for GY, FLO, HI and PE-related traits. P-efficient varieties had higher yield under ?P conditions. Varietal performance under ?P varied across environments depending on FLO, relative flowering delay under ?P (FD) and RGY measured in the field. Low-P-susceptible varieties had higher FLO, lower HI than low-P-tolerant varieties. Response to direct selection under ?P field conditions was 20.1 g m?2, whereas indirect selection response under +P was 16.3 g m?2.ConclusionsSelection under ?P field conditions while taking into account seasonal variations for FLO, FD and PE is expected to be important for improving GY specifically targeting ?P environments in WA
  • Pearl millet [Pennisetum glaucum (L.) R. Br.] open-pollinated varieties, which are the predominant cultivars, have never been systematically evaluated for adaptation to low-soil phosphorus (P), a major constraint on pearl millet production in West Africa (WA).
  • Selection under -P field conditions while taking into account seasonal variations for FLO, FD and PE is expected to be important for improving GY specifically targeting -P environments in WA.
  • Significant genetic variation was observed for GY, FLO, HI and PE-related traits. P-efficient varieties had higher yield under -P conditions. Varietal performance under -P varied across environments depending on FLO, relative flowering delay under -P (FD) and RGY measured in the field. Low-P-susceptible varieties had higher FLO, lower HI than low-P-tolerant varieties. Response to direct selection under -P field conditions was 20.1 g m(-2), whereas indirect selection response under +P was 16.3 g m(-2).
  • We evaluated grain yield (GY), flowering time (FLO), harvest index (HI), and residual grain yields (RGY) of 102 open-pollinated varieties from WA under low-P (-P) and high-P (+P) field conditions in six environments of WA. In addition, PE-related traits of the varieties were evaluated at early growth stage in a pot experiment.

publication date

  • 2016
  • 2016
  • 2016