Phosphorus uptake and use efficiency of diverse West and Central African sorghum genotypes under field conditions in Mali

Leiser, W L and Rattunde, H F W and Weltzien, E and Haussmann, B I G (2014) Phosphorus uptake and use efficiency of diverse West and Central African sorghum genotypes under field conditions in Mali. Plant and Soil, 377 (1-2). pp. 383-394. ISSN 1573-5036

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Abstract

Aims Sorghum [Sorghum bicolor (L.) Moench], a staple crop in West and Central Africa (WCA), is mostly cultivated on soils with low phosphorus (P) availability and thus adaptation to those conditions is vital for food security. Assessment of genotypic variation of WCA sorghum for P uptake and P use efficiency is undertaken to understand the diversity available and opportunities for its use. Method We assessed mature plant yield, P uptake and P use efficiency traits of 70 diverse WCA sorghum genotypes under –P (no P fertilization) and + P field conditions in Mali in 2010, to discover differences among all genotypes tested and between and within specific genotype groups. Results Large significant genotypic variation for P uptake and P use efficiency traits were observed for all genotypes among and within landrace and researcher bred pools under –P conditions. P uptake traits had a larger genotypic variation than P use efficiency traits. Landrace genotypes showed generally higher P uptake and grain P concentration while formally bred genotypes exhibited a higher P use efficiency. Photoperiod sensitivity was related to higher P uptake. Conclusion Genotypic selection for P uptake and P use efficiency traits to improve adaptation to low P soils is possible in sorghum. Use and further study of WCA sorghums for adaptation to low P availability is appropriate as this germplasm shows large variation for P uptake and use efficiency and higher levels of P use efficiency than other important cereals.

Item Type:	Article
Divisions:	RP-Dryland Cereals
CRP:	CGIAR Research Program on Dryland Cereals
Uncontrolled Keywords:	Sorghum, Phosphorus efficiency, Genetic diversity, Plant breeding
Subjects:	Mandate crops > Sorghum Others > Agriculture-Farming, Production, Technology, Economics
Depositing User:	Mr Sanat Kumar Behera
Date Deposited:	16 Jan 2014 02:39
Last Modified:	19 Aug 2016 08:39
URI:	http://oar.icrisat.org/id/eprint/7320
Official URL:	http://dx.doi.org/10.1007/s11104-013-1978-4
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	UNSPECIFIED
Links:	Google Scholar

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