Root system size response of bzh semi-dwarf oilseed rape hybrids to different nitrogen levels in the field.

ABSTRACT:

Background and aims

In oilseed rape (Brassica napus) semi-dwarf hybrid varieties from crosses between bzh dwarf and normal-type lines are of increasing interest. They have improved nitrogen (N) uptake, N-utilization and N-use efficiency compared to normal types. This study aimed to elucidate whether these N-related effects can be explained by the bzh shoot growth-type alone or also by differences in root traits.

Methods

Root system size was measured using root electrical capacitance (EC) in field trials with two N levels in two sets of genotypes segregating for the bzh-locus: (1) 108 doubled haploid (DH) test hybrids in two seasons, 2010-2012, and (2) 16 near-isogenic hybrids in the 2016-17 season. Quantitative trait loci (QTL) for root EC were estimated in DH test hybrids.

SUBMITTER: Schierholt A 

PROVIDER: S-EPMC6881224 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature