Effect of Winter Canola Cultivar on Seed Yield, Oil, and Protein Content

Abstract

Canola (Brassica napus L.) is an oilseed crop that can produce healthy cooking oil and animal feed byproducts. Although it is a relatively new crop, approved for human consumption less than 40 yr ago, advances in breeding have allowed for its production as a winter crop in the southeastern United States. There is little published research, however, related to its performance and quality in this region. Therefore, a study was conducted during the 2014–2015 (Year 1) and 2015–2016 (Year 2) seasons in Tennessee. Twenty‐three varieties were planted in a randomized complete block design with four replications across both years to determine seed yield, seed oil, and seed protein content. Differences in fertilizer application rates, planting, and harvest management and differences in weather conditions probably led to significant interactions between years. Cultivar yields ranged from 1269 to 2647 and 1494 to 4199 kg ha−1, seed oil content ranged from 44 to 48% and from 43 to 46%, and seed protein content ranged from 20 to 24% and from 19 to 23% for Years 1 and 2, respectively. In each year, open‐pollinated cultivars had significantly lower yield and oil content but significantly greater protein content than hybrid cultivars. There was also a strong negative correlation between seed oil and seed protein and the linear models were significant (r = 0.88, p < 0.0001 for Year 1; r = 0.85, p < 0.0001 for Year 2). Recommended winter canola cultivars include Exp1302 and Hekip. Core Ideas Little published research is available related to the performance of winter canola in the southeastern United States. Yield, oil, and protein content were identified across 23 potential winter canola cultivars over 2 yr. Significant linear relationships were observed between seed oil and protein content but not when compared with yield.

Canola yield, forage accumulation, and nutritive value in dual‐purpose and companion cropping

“…Overall, canola cultivar differences resulted in significant yield variation dependent on year. In line with our results, after testing 23 canola cultivars in Tennessee, Tetteh, de Koff, Pokharel, Link, & Robbins (2019) concluded significant variation across cultivars dependent on weather condition. The two cultivars used in our study, Griffin and Wichita, have different growth habits.…”

Yield and Quality Prediction of Winter Rapeseed—Artificial Neural Network and Random Forest Models

“…Throughout May of the same year, during flowering and at the beginning of the seed filling phase, precipitation was higher than the long-term average (64.6 mm for the period 1964-2014). Although precipitation is one of the main factors that positively influence oil content in rapeseed [46,47], it should be kept in mind that it is not the only factor influencing oil content, since in years with high precipitation during seed filling oil content may not be as high as expected [48]. This is in line with our study, as in May 2015 precipitation was three times higher than the long-term average and the oil content was lowest in that year.…”

“…The strength of the correlation between two analysed traits may differ in different agroecological growing conditions. A strong negative correlation between oil and protein content was previously reported [48,52,53]. An increase in oil content in the seed can arise whether at the expense of decreasing protein content, or by reduction of other seed components [49].…”

Camelina sativaComposition, Attributes, and Applications: A Review

“…Oil content Protein content Reference Camelina (Camelina sativa L.), 30-49% 24-31% [2,11,12] Canola (Brassica napus L.), 44-53% 17-27% [ 12,19] Flax (Linum usitatissimum L.) 37-49% 19-24% [ 20,21] Soybean (Glycine max L.) 19-22% 39-49% [ 22,23] Sunflower (Helianthus annuus L.) 20-43% 15-21% [24] seeds. The four main fatty acids are c-11-eicosenoic acid, linoleic acid, 𝛼-linolenic acid, and oleic acid.…”