Identification and characterization of improved nitrogen efficiency in interspecific hybridized new-type Brassica napus.

ABSTRACT:

Background and aims

Oilseed rape (Brassica napus) is an important oil crop worldwide. The aim of this study was to identify the variation in nitrogen (N) efficiency of new-type B. napus (genome A(r)A(r)C(c)C(c)) genotypes, and to characterize some critical physiological and molecular mechanisms in response to N limitation.

Methods

Two genotypes with contrasting N efficiency (D4-15 and D1-1) were identified from 150 new-type B. napus lines, and hydroponic and pot experiments were conducted. Root morphology, plant biomass, N uptake parameters and seed yield of D4-15 and D1-1 were investigated. Two traditional B. napus (genome A(n)A(n)C(n)C(n)) genotypes, QY10 and NY7, were also cultivated. Introgression of exotic genomic components in D4-15 and D1-1 was evaluated with molecula

SUBMITTER: Wang G 

PROVIDER: S-EPMC4204666 | biostudies-literature | 2014 Sep

REPOSITORIES: biostudies-literature