Nitrogen and phosphorus use efficiency of 43 wheat alien chromosome addition lines evaluated by hydroponic culture

Abstract

Wild relatives of wheat may possess useful traits or genes for efficient use of nitrogen (N) or phosphorus (P). Forty-three wheat addition lines with alien chromosomes from Leymus, Agropyron, Hordeum, Psathyrostachys, Aegilops, and Secale cereale, along with their common parent Chinese Spring (CS) were cultured by hydroponics, and their phenotypic variation, N/P uptake and utilization efficiency were investigated at seedling stage. The phenotypic variation showed that N deficiency decreased plant height, shoot dry weight, and total dry weight, while increased root length, number of leaves, SPAD value, and root to shoot ratio (R/S); while P deficiency decreased all the measured traits except root dry weight and R/S. Aegilops longissima 2S and Aegilops searsii 4SS addition lines were identified as both N- and P-efficient germplasm, of which Ae. longissima 2S addition line showed significant increased N and P uptake efficiency than CS under all treatments.

Keywords:

• Alien chromosome
• hydroponic culture
• nitrogen efficiency
• phosphorus efficiency
• wheat addition line

Acknowledgments

This work was financially supported by the Natural Science Foundation of Shandong Province (ZR2017BC015), the Key Research and Development Program of Shandong Province (2017GNC10107), the sub-project of the 863 Program (2011AA100504) of the Ministry of Science and Technology; the China 111 Project (B12007) of the Ministry of Education of China; Science and Technology Innovation Team Plan of Shaanxi Province (2014KCT-25); ACIAR Project (CIM/2005/111) of Australia as well as the EU-China partnership initiative project “Breeding to Optimize Chinese Agriculture” (OPTICHINA, FP7-KBBE-2010-4).