Potential of rutabaga (Brassica napus var. napobrassica) gene pool for use in the breeding of hybrid spring Brassica napus canola

Abstract

The use of rutabaga for increasing the level of heterosis in spring canola was investigated. For this, test hybrids were produced by crossing four inbred populations, derived from F 2 and BC 1 of two rutabaga × spring canola crosses, to their spring canola parent, and were tested in field-plots for agronomic and seed quality traits. Average mid-parent heterosis (MPH) in these test hybrid populations was about 5%-15% for yield. Compared to the F 2 -derived population, the BC 1 -derived population exhibited 1.8-times greater MPH for yield. No correlation was found between inbred and test hybrid for yield; however, a positive correlation of genetic diversity of the inbred lines was found with MPH (r = .58) and hybrid yield (r = .36) suggesting that non-additive effect of the genes may play an important role for high yield in hybrids. About 2% negative MPH was found for days to flowering, while almost no heterosis was found for seed oil and protein contents. Thus, our study demonstrates the potential of the rutabaga gene pool for use in hybrid canola breeding.

Genetic Improvement in Juglans mandshurica and Its Uses in China: Current Status and Future Prospects

“…Generally, the improvement of superior varieties in forest trees mainly focuses on wood properties (latewood rate, basic density, fiber length, fiber width), fruit traits (high fruit yield and quality), growth traits (growth rate, tree height and DBH) or other traits to obtain high economic and ecological benefits. Currently, a variety of research methods, such as hybrid breeding [20], polyploid breeding [21,22], molecular breeding [23] and other research methods, have been used for further selection and breeding in improved varieties, which has produced many insightful results. However, researchers have mainly focused on conventional breeding to select improved J. mandshurica varieties [24][25][26].…”

Analysis of single nucleotide polymorphism and simple sequence repeat markers for the estimates of genetic diversity by using two oilseed Brassica napus populations carrying genome contents of Brassica oleracea

“…Introduction of alleles from winter type (Butruille et al 1999, Quijada et al 2004, Kebede et al 2010) and rutabagas (Shiranifar et al 2020(Shiranifar et al , 2021 into spring type B. napus, as well as from B. rapa (Li et al 2013, Attri et al 2017), B. oleracea (Li et al 2014, Rahman et al 2015, Chinese kale accession in this interspecific cross, despite wide diversity exists in B. oleracea (Izzah et al 2013).…”