QTLs for nitrogen uptake and utilisation efficiencies in temperate forage grass, Lolium perenne.

Type Poster
Original languageEnglish
Number of pages1
Publication statusPublished - Jan 2013
EventPlant and Animal Genome XXI - San Diego, California, United States of America
Duration: 12 Jan 201316 Jan 2013

Conference

ConferencePlant and Animal Genome XXI
CountryUnited States of America
CitySan Diego, California
Period12 Jan 201316 Jan 2013
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Abstract

Nitrogen use efficiency (NUE) from soil to plant is an important trait to consider with respect to grassland improvement since it impacts on fertiliser use and nitrogen pollution of waterways. Perennial ryegrass (Lolium perenne L) is the most important grass species of temperate grasslands and QTL for NUE, both uptake and utilisation of N, have been characterised in a series of experiments conducted in flowing solution culture providing precise control of N form and concentration. Acquisition and utilisation efficiencies of N were characterised under growth-limiting and non-limiting concentrations of nitrate or ammonium. Significant QTL for uptake and utilisation efficiencies, and for their component traits, were observed in all cases. The presentation will examine the QTLs detected and how they were affected by the source and the concentration of nitrogen supplied. The presentation will also include the ways identified QTLs are bred into elite ryegrass genotypes using conventional and marker assisted breeding approaches.