relation: http://oar.icrisat.org/8908/
title: Phosphorous Efficiency and Tolerance Traits for Selection of Sorghum for Performance in Phosphorous-Limited Environments
creator: Leiser, W L
creator: Rattunde, H F W
creator: Piepho, H P
creator: Weltzien, E
creator: Diallo, A
creator: Toure, A
creator: Haussmann, B I G
subject: Sorghum
description: Sorghum (Sorghum bicolor (L.) Moench) is widely cultivated in West Africa (WA) on soils with low phosphorus (P) availability. Large genetic variation for grain yield (GY) under low-P conditions was observed among WA sorghum genotypes, but information is lacking on the usefulness of P-tolerance ratios (relative performance in –P [no P fertilizer] vs. +P [with P fertilizer] conditions) and measures of P-acquisition and internal P-use efficiency as selection criteria for enhancing GY under low-P conditions. We evaluated 70 WA sorghum genotypes for GY performance under −P and +P conditions for 5 yr in two locations in Mali and assessed P acquisition (e.g., P content in biomass) and P-use efficiency (e.g., grain produced per unit P uptake) traits under −P and +P conditions in one site in 2010. Significant genetic variation existed for all P-tolerance ratios across multiple sites. Photoperiod-sensitive landrace genotypes showed significantly better P tolerance and less delay of heading under P-limited conditions compared with photoperiod-insensitive varieties. Genotypic correlations of P-tolerance ratios to GY under −P were moderate. Phosphorous acquisition and P-use efficiency traits independent of harvest index were of similar importance for GY under −P conditions in statistically independent trials. However grain-P and stover-P concentrations from one −P trial showed only weak correlations with GYs in statistically independent trials. Highest predicted gains for −P GY were obtained by theoretical index selection based on −P GY combined with P-use efficiency traits (e.g., low-grain P concentration). Such index selection is expected to achieve both increased sorghum productivity and P sustainability in the P-limited WA production systems.
publisher: Crop Science Society of America
date: 2015-03-27
type: Article
type: PeerReviewed
format: application/pdf
language: en
identifier: http://oar.icrisat.org/8908/1/Environments.pdf
identifier:   Leiser, W L and Rattunde, H F W and Piepho, H P and Weltzien, E and Diallo, A and Toure, A and Haussmann, B I G  (2015) Phosphorous Efficiency and Tolerance Traits for Selection of Sorghum for Performance in Phosphorous-Limited Environments.  Crop Science, 55 (3).  pp. 1152-1162.  ISSN 0011-183X     
relation: http://dx.doi.org/10.2135/cropsci2014.05.0392
relation: 10.2135/cropsci2014.05.0392