Evaluation of Spring Canola (Brassica Napus) Lines Derived from Rutabaga (Brassica Napus Var. Napobrassica) X Canola Crosses for Agronomic and Seed Quality Traits and Heterosis

• Author / Creator

  Shiranifar, Bijan

• Brassica napus L. (AACC, 2n = 38) canola is the most extensively cultivated Brassica oilseed crop in the world; it is one of the most important field crops in Canada. The narrow genetic diversity in this crop is considered one of the major hindrances for continued improvement of this crop for high seed yield and improved agronomic traits. The potential value of the Rutabaga (B. napus var. napobrassica) gene pool for broadening the genetic base of the Canadian spring B. napus canola and for use in the breeding of hybrid cultivars was investigated in this M.Sc. thesis research. For this, the agronomic and seed quality traits including seed yield of a set of F2- and BC1-derived inbred lines, developed from two Rutabaga × spring B. napus canola crosses, and their test hybrids were evaluated in replicated field trials. The inbred lines were also analyzed by use of SSR markers to estimate the extent of allelic diversity introgressed from Rutabaga into the inbred lines. SSR marker analysis showed that genetically distinct spring B. napus canola lines carrying the unique alleles of the A and C genomes of Rutabaga can be obtained from both F2- and BC1-derived populations. Some of the inbred lines gave higher seed yield than the spring canola parent and also displayed high heterosis in the test hybrids, which apparently resulted from favorable combinations of Rutabaga and spring B. napus canola alleles. Thus, the results from this study demonstrated the potential value of the Rutabaga gene pool for use in the breeding of hybrid spring B. napus canola cultivars.

• Subjects / Keywords

  • Test hybrid
  • Introgression of allelic diversity
  • Rutabaga (Brassica napus var. napobrassica)
  • Brassica napus
  • Genetic diversity
  • Heterosis
  • Spring canola (Brassica napus) inbred lines

• Graduation date

  Spring 2018

• Type of Item

  Thesis

• Degree

  Master of Science

• DOI

  https://doi.org/10.7939/R3ZK5624M

• License

  This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.