Assessment of agronomic performance and heterosis for agronomic traits in hybrid high erucic acid rapeseed (HEAR)

2009 ◽  
Vol 89 (2) ◽  
pp. 227-237 ◽  
Author(s):  
R. D. Cuthbert ◽  
G. Crow ◽  
P. B. E. McVetty
Keyword(s):  
Brassica Napus ◽  
Erucic Acid ◽  
Seed Yield ◽  
Agronomic Traits ◽  
Brassica Napus L ◽  
High Erucic Acid ◽  
High Erucic Acid Rapeseed ◽  
Days To Maturity ◽  
The University ◽  
Seed Yields

Twelve genetically diverse and geographically distinct high erucic acid rapeseed (HEAR) Brassica napus L. cultivars/lines were selected and crossed by hand emasculation in a topcross design to produce 45 F1 hybrid combinations. Seven of the twelve parents were HEAR cultivars/lines developed by the University of Manitoba (UM) and the remaining five parents were proprietary European (EU) HEAR cultivars/lines. Adequate seed was produced to evaluate the hybrids and parents in replicated yield trials in six environments in Manitoba during 2004 and 2005. Vigor, days to first flower, days to maturity, lodging, plant height, and seed yield were assessed. The hybrids were generally more vigorous, taller and more lodging resistant than their parents with similar days to first flower and days to maturity as their earlier parents. The best hybrids in this study displayed high parent heterosis for seed yield of up to 143% and commercial heterosis for seed yield of up to 99%. These hybrids were from the most genetically diverse UM × EU crosses. HEAR hybrids appear very promising approach to increase seed yields in this crop. Key words: Brassica napus L., HEAR, heterosis, hybrids, genetic diversity

Comparison of pedigree selection and doubled haploid breeding methods for high erucic acid rapeseed cultivar development

2005 ◽  
Vol 85 (4) ◽  
pp. 809-814 ◽  
Author(s):  
J. L. Jacobs ◽  
P. B.E. McVetty
Keyword(s):  
Brassica Napus ◽  
Erucic Acid ◽  
Doubled Haploid ◽  
Seed Quality ◽  
Breeding Methods ◽  
Brassica Napus L ◽  
High Erucic Acid ◽  
High Erucic Acid Rapeseed ◽  
Pedigree Selection ◽  
Doubled Haploid Breeding

Sixty families from pedigree selection and 60 lines from doubled haploid development per cross, for three different Brassica napus L. high erucic acid rapeseed (HEAR) crosses, were created and then compared for agronomic and seed quality performance in four environments in Manitoba in 2000 and 2001. Differences in mean performance for many traits were observed within crosses; however, these differences were not consistent among crosses. Similarly, there were differences observed in ranges for many traits within crosses but with few clear trends among crosses. Similar numbers of superior pedigree selection families and doubled haploid lines within and among crosses for individual traits and for combinations of all traits were found in this study. Financial and temporal resource requirements for these two breeding methods were found to be similar. It is concluded that both pedigree selection and doubled haploid breeding methods have their particular strengths and weaknesses but that neither is clearly superior for the development of B. napus HEAR cultivars. Key words: Brassica napus L., HEAR, breeding method comparisons

Phenotypic diversity analysis and performance of elite lines of Brassica napus L.

2021 ◽  
Vol 50 (1) ◽  
pp. 1-6
Author(s):  
Muhammad Sajjad Iqbal ◽  
Muhammad Akbar
Keyword(s):  
Brassica Napus ◽  
Plant Height ◽  
Seed Yield ◽  
Large Scale ◽  
Phenotypic Diversity ◽  
Phenotypic Traits ◽  
Brassica Napus L ◽  
Days To Maturity ◽  
Pakistani Origin ◽  
Pod Length

Thirteen elite lines of Brassica napus L. were tested. Nine phenotypic traits viz., days to 50% flowering, days to maturity, plant height, branches, pods, pod length, pod width, pod weight and seed yield were studied. ANOVA revealed significant results for all the traits while summary statistics exhibited high level of genetic variability in days to 50% flowering, days to maturity, plant height and number of pods. On the other hand, number of branches, pod length, pod width, pod weight and seed yield need more attention for improvement. Coefficient of correlation revealed significant combinations among various traits which could be utilized directly. Cluster analysis based on linkage distances described grouping pattern into three clusters for dissimilarities. Elite line 24866 of Pakistani origin placed in separate cluster prominently that is due to best performance for maximum traits, hence recommended for farmers’ field large scale cultivation.

Venus high erucic acid, low glucosinolate summer rape

1996 ◽  
Vol 76 (2) ◽  
pp. 341-342 ◽  
Author(s):  
P. B. E. McVetty ◽  
R. Scarth ◽  
S. R. Rimmer ◽  
C. G. J. van den Berg
Keyword(s):  
Brassica Napus ◽  
Erucic Acid ◽  
Key Words ◽  
Seed Oil ◽  
Western Canada ◽  
Brassica Napus L ◽  
High Erucic Acid ◽  
Rapeseed Cultivar ◽  
Cultivar Description ◽  
Canola Quality

Venus summer rape (Brassica napus L.) is a high-erucic acid rapeseed cultivar with canola-quality meal. Venus has an average 5% yield advantage over Hero rapeseed with seed oil and protein contents comparable to Hero. Venus is adapted to the southern B. napus growing regions of western Canada. Key words: Rape (summer), high erucic acid-low glucosinolate, cultivar description

Assessment of seed quality performance and heterosis for seed quality traits in hybrid high erucic acid rapeseed (HEAR)

2011 ◽  
Vol 91 (5) ◽  
pp. 837-846 ◽  
Author(s):  
R. D. Cuthbert ◽  
G. Crow ◽  
P. B. E. McVetty
Keyword(s):  
Erucic Acid ◽  
Seed Oil ◽  
Seed Quality ◽  
Agronomic Traits ◽  
Quality Traits ◽  
Quality Performance ◽  
High Erucic Acid ◽  
High Erucic Acid Rapeseed ◽  
Oil Concentration ◽  
Seed Quality Traits

Cuthbert, R. D., Crow, G. and McVetty, P. B. E. 2011. Assessment of seed quality performance and heterosis for seed quality traits in hybrid high erucic acid rapeseed (HEAR). Can. J. Plant Sci. 91: 837–846. Hybrids are becoming the dominant cultivar type in Brassica napus L. to utilize the well-documented heterosis for seed yield in canola/rapeseed. While there are numerous reports of heterosis for agronomic traits in B. napus hybrids, there are few reports of heterosis for seed quality traits in this species. The objectives of this study were to determine if high parent or commercial heterosis for any seed quality traits occurs in high erucic acid rapeseed (HEAR) hybrids. Seed quality performance of 45 F1 B. napus HEAR hybrids, derived from crosses of 12 geographically and genetically distinct (based on known pedigrees) HEAR cultivars/lines, was assessed in the current study using seven HEAR cultivars/lines developed by the University of Manitoba (UM) and five proprietary European (EU) HEAR cultivars/lines. Replicated field trials to assess seed oil, protein, sum of oil and protein, glucosinolate, and erucic acid concentrations were conducted over six environments in Manitoba during 2004 and 2005. High parent heterosis and commercial heterosis for seed oil concentration up to 9% and up to 14%, respectively, was observed with hybrids displaying seed oil concentrations as high as 533 g kg−1. Low parent heterosis for protein and glucosinolate concentrations was also observed. Erucic acid concentration displayed commercial heterosis. Many hybrids displayed near zero percent heterosis for any seed quality traits; however, overall seed quality was maintained or increased even in these hybrids. The results of this study indicate that development of HEAR hybrids can be an effective way to improve seed quality components, especially oil concentration, in this crop.

HYHEAR 1 hybrid Roundup Ready™ high erucic acid, low glucosinolate summer rape

2014 ◽  
Vol 94 (2) ◽  
pp. 453-455 ◽  
Author(s):  
P. B. E. McVetty ◽  
J. L. Cuthbert ◽  
V. Marwede ◽  
W. Paulmann ◽  
O. Sass ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Erucic Acid ◽  
Seed Oil ◽  
Field Trials ◽  
Erucic Acid Content ◽  
Western Canada ◽  
Brassica Napus L ◽  
Roundup Ready ◽  
High Erucic Acid ◽  
Meal Protein

McVetty, P. B. E., Cuthbert, J. L., Marwede, V., Paulmann, W., Sass, O., Duncan, R. W., Fernando, W. G. D., Li, G. and Zelmer, C. D. 2014. HYHEAR 1 hybrid Roundup Ready™ high erucic acid, low glucosinolate summer rape. Can. J. Plant Sci. 94: 453–455. HYHEAR 1 summer rape (Brassica napus L.) is the world's first hybrid Roundup Ready™ high erucic acid, low glucosinolate cultivar. On average, HYHEAR 1 yielded 33% more seed, 23 g kg−1 more seed oil but 17 g kg −1 less meal protein than MillenniUM 03 high erucic acid, low glucosinolate, open pollinated population summer rape. HYHEAR 1 has an erucic acid content of 52.2% in isolated field trials of HEAR lines and is adapted to the southern B. napus growing regions of western Canada.

Genetic Variability, Correlation and Path Analysis in Advanced Lines of Rapeseed (Brassica Napus L.) for Yield Components

2014 ◽  
Vol 47 (1) ◽  
pp. 71-79 ◽  
Author(s):  
Ejaz Ul-Hasan ◽  
H.S.B. Mustafa ◽  
Tahira Bibi ◽  
T. Mahmood
Keyword(s):  
Brassica Napus ◽  
Path Analysis ◽  
Plant Height ◽  
Seed Yield ◽  
Yield Components ◽  
Seed Weight ◽  
Significant Positive Correlation ◽  
Brassica Napus L ◽  
Yield Improvement ◽  
Days To Maturity

ABSTRACT The present research was carried out to determine the best selection criteria for yield improvement in rapeseed (Brassica napus L.). Nine genotypes of Brassica napus were sown at Oilseeds Research Institute, Faisalabad, during the years 2011- 2012, to evaluate the means and components of variability (genotypic and phenotypic), heritability (h2 B.S), correlation (genotypic and phenotypic) and path analysis for yield and various yield components. At phenotypic and genotypic level, seed yield/plant had significant positive correlation with plant height, seeds/plant and siliqua/plant. A positive and highly significant genetic relationship was found between plant height and seeds/plant, siliqua length and seeds/siliqua, days to maturity and 1000 seed weight, days to flowering and seeds/plant, days to maturity and seeds/plant. Path coefficient revealed that the seeds/siliqua, 1000 seed weight, days to flowering, days to maturity and seeds/plant had direct positive contribution towards seed yield per plant. For rapeseed breeding seed per plant was the variable with maximum potential of selection for seed yield improvement because this trait possessed high h2 B.S, highly significant positive correlation and maximum positive direct effects with yield

SEED PRODUCTION OF HYBRID SUMMER RAPE IN THE FIELD USING THE POL CYTOPLASMIC MALE STERILITY SYSTEM: A FIRST ATTEMPT

1990 ◽  
Vol 70 (3) ◽  
pp. 611-618 ◽  
Author(s):  
R. PINNISCH ◽  
P. B. E. McVETTY
Keyword(s):  
Brassica Napus ◽  
Male Sterility ◽  
Seed Production ◽  
Seed Yield ◽  
Hybrid Seed ◽  
Male Sterile ◽  
Male Sterile Line ◽  
Brassica Napus L ◽  
Total Seed ◽  
Seed Yields

Hybrid summer rape (Brassica napus L.) seed production blocks were established at two locations in Manitoba in 1986 and 1987 to examine the effect of distance from the pollen source on seed yield, (both total and hybrid) and percent hybridity of seed produced on rows of a male sterile line of the open pollinated population B. napus cultivar, Marnoo, possessing the pol cytoplasmic male sterility inducing cytoplasm. A 10:1 ratio of male sterile line (A-line) to pollen parent was employed. Leaf cutter bees (Megachile rotundata F.) were used as the pollen vector between the two parents. In 1986, no significant differences in total seed yield were found among A-line rows, while in 1987, significant differences in total seed yields of A-line rows were found. Differences in hybrid seed yields among A-line rows were significant for all locations and years. Leaf cutter bees were found to be effective pollinators of the A-line plants. Less than half and less than a third of the seed produced on the A-line rows in 1986 and 1987, respectively, was hybrid seed. The high percentage of non-hybrid seed present in the seed lot may have been due to incomplete male sterility of the Marnoo A-line population. Total seed yields, hybrid seed yields and percent hybridity all declined linearly as distance from the pollen source increased. Improvement in the degree of male sterility of the Marnoo A-line population and/or a reduction in the 10:1 ratio of parents, and subsequent maximum A-line row to R-line row distance, will be necessary if hybrid summer rape seed production using this pol CMS A-line is to be commercially viable.Key words: Brassica napus L., CMS, hybrid, hybridity

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