Phosphorus uptake and utilization efficiency in West African pearl millet inbred lines

Gemenet, D C and Hash, C T and Sanogo, M D and Sy, O and Zangre, R G and Leiser, W L and Haussmann, B I G (2015) Phosphorus uptake and utilization efficiency in West African pearl millet inbred lines. Field Crops Research, 171. pp. 54-66. ISSN 0378-4290

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Abstract

Pearl millet [Pennisetum glaucum (L.) R. Br] production on the acid sandy Sahelian soils in West Africa (WA) is severely limited by low plant-available phosphorus (P) in addition to erratic rainfall. We sought to examine the genetic variability for P uptake and P utilization efficiency in 180 WA pearl millet inbred lines or subsets thereof under low (LP) and high P (HP) conditions in one field and two pot experiments, determine the relationships among the measured traits and grain yield under field conditions at three other independent WA sites, and identify potential secondary selection traits for improving grain yield under LP. We observed genetic variation for P uptake and utilization in both seedling and mature plants. P utilization efficiency increased under LP conditions. Total P uptake was more important for grain production than P utilization under LP field conditions (r = 0.57*** vs r = 0.30***). The estimated response to indirect selection was positive for most of the measured morphological and P-efficiency parameters. We conclude that both seedling and mature plant traits are potentially useful as secondary traits in selection of pearl millet for low-P adaptation. These results should be validated using heterozygous pearl millet genetic materials. Ultimately, pearl millet breeding activities for low P tolerance in WA should be integrated with other system-oriented research such as nutrient cycling, intercropping or rotations with legumes, better crop-tree-livestock integration, and modest applications of locally available rock phosphate.

Item Type: Article
Divisions: RP-Dryland Cereals
CRPS: CGIAR Research Program on Dryland Cereals
Uncontrolled Keywords: Pearl millet; Phosphorus; Phosphorus uptake efficiency; Phosphorus utilization efficiency; West Africa
Subjects: Mandate crops > Millets
Others > Fertilizer Appications
Depositing User: Mr B K Murthy
Date Deposited: 23 Jan 2015 04:22
Last Modified: 19 Aug 2016 03:51
URI: http://oar.icrisat.org/id/eprint/8490
Official URL: http://dx.doi.org/10.1016/j.fcr.2014.11.001
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: UNSPECIFIED
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