Influence of the Semi‐dwarf Growth Type on Nitrogen Use Efficiency in Winter Oilseed Rape

• DOI: 10.2135/cropsci2016.01.0044
• Publication Date: 2016-09-01T20:45:23Z
• Authors: Sebastian Miersch; Andreas Gertz; Frank Breuer; Antje Schierholt; Heiko C. Becker
• Keywords: Doubled haploidy

A higher nitrogen (N) use efficiency is an important breeding goal in crops such as oilseed rape ( Brassica napus L.) that are considered less N efficient compared with like wheat Triticum aestivum or barley Hordeum vulgare L.). Changes the plant ideotype, reduced height of semi‐dwarf hybrids, said to result increased harvest index and index. This could lead a efficiency, especially when availability restricted. double haploid population was developed segregating for bzh dwarf locus, 54 normal‐type lines. By crossing tester, 108 testcrosses were produced hybrids each normal types. They evaluated seed yield, straw content under zero high fertilization six four trials, respectively, years 2010 2013. Quantitative trait loci estimated N‐related traits across environments. Semi‐dwarf showed significantly index, uptake utilization at deficiency. The relative contribution total genetic variation genotypes than both levels. five two fertilization, cosegregated ‐locus on linkage group A06, indicating growth type has influence efficiency. We conclude better adapted