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首页> 外文期刊>Plant and Soil >Phosphorus uptake and use efficiency of diverse West and Central African sorghum genotypes under field conditions in Mali
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Phosphorus uptake and use efficiency of diverse West and Central African sorghum genotypes under field conditions in Mali

机译：马里农田条件下不同西非和中非高粱基因型对磷的吸收和利用效率

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摘要

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. 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. 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. 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.
机译：高粱[Sorghum bicolor（L.）Moench]是西非和中非（WCA）的主食，主要种植在磷（P）利用率低的土壤上，因此适应这些条件对于粮食安全至关重要。评估WCA高粱的磷吸收和磷利用效率的基因型变异，以了解其多样性和利用机会。我们评估了2010年马里-P（无磷肥）和+ P田间条件下70种WCA高粱基因型的成熟植物产量，P吸收和P利用效率特征，以发现所有基因型之间以及特定基因型之间和内部的差异。组。在-P条件下，在地方品种和研究者繁殖池中和内部的所有基因型均观察到了磷吸收和磷利用效率性状的重大基因型变异。磷吸收性状的基因型变异大于磷吸收效率性状。地方品种基因型通常显示较高的磷吸收和籽粒磷浓度，而正式繁殖的基因型则显示较高的磷利用效率。光周期敏感性与较高的P吸收量有关。高粱可能进行磷吸收和磷利用效率性状的基因型选择，以提高其对低磷土壤的适应性。使用和进一步研究WCA高粱以适应低磷可利用性是适当的，因为该种质表明磷吸收和利用效率差异很大，并且磷利用效率水平高于其他重要谷物。

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