Gary R. Ablett

Relationships and inheritance of linolenic acid and seed lipoxygenases in soybean crosses designed to combine these traits

To improve oxidative stability of soybean oil and reduce off-flavours, we previously developed low linolenic acid, lipoxygenase-free (LLA.3lx) soybean germplasm. The objectives of this study were to characterize the patterns of inheritance and determine the relationships between the low linolenic acid (LLA) trait derived from the lines RG10 and PI 361088B and seed lipoxygenase nulls (3lx) from a triple null line OX948 that were used to create the new LLA.3lx germplasm. Reciprocal crosses between RG10 and OX948 and between PI 361088B and OX948 were made and populations derived from them were evaluated for their fatty acid profiles and seed lipoxygenases (LX) at the F2, F5 and F6 generations. Both RG10 and PI 361088B contain a single gene that controls linolenic acid (LA) content with alleles acting in an additive manner. No significant cytoplasmic effects were observed on LA content. The LLA trait was highly heritable in both RG10 × OX948 (RO) and PI 361088B × OX948 (PO) crosses and stable in different env...

Association of seed and agronomic traits with isoflavone levels in soybean.

Soybean, Glycine max (L.) Merr., seeds contain isoflavones, compounds with potential human health benefits. This study investigated the association of seed and agronomic traits with isoflavone level in a genetically diverse group of soybean genotypes to provide more information for cultivar development. F4:7 lines derived from several crosses were grown in four locations in 2005 and six locations in 2006 across Ontario and Quebec. Seed protein, oil and isoflavone contents were measured using near-infrared reflectance (NIR) on a plot basis. Seed yield was determined at 13% moisture and days to maturity (R8) were recorded. GGE genotype-by-trait biplots were generated to describe the relationships among all variables. Isoflavone content was not correlated with yield, indicating that potential exists for development of high or low isoflavone cultivars without sacrificing yield. Isoflavone content was negatively correlated with protein content; however, high isoflavone lines were identified with moderate prote...

RCAT Wildcat soybean

RCAT Wildcat is a 2950 crop heat unit (CHU) soybean [Glycine max (L.) Merrill] cultivar with excellent yield potential, good lodging resistance and above-average seed protein levels. It was developed by the Ridgetown College, University of Guelph, and is adapted to the 2800–3100 CHU areas of Ontario. RCAT Wildcat was issued registration number 5568 on 2002 Dec. 11 by the Variety Registration Office, Plant Production Division of the Canadian Food Inspection Agency. Key words: Soybean, cultivar description

OAC Prosper Soybean

Abstract: OAC Prosper is a semi-determinate food-grade soybean (Glycine max (L.) Merr.) cultivar with high yield potential, high seed protein concentration, and resistance to soybean cyst nematode. OAC Prosper is developed and recommended for soybean growing areas in southwestern Ontario with 2950 or greater crop heat units. OAC Prosper has a relative maturity of 1.8.

OAC Brooke soybean

Abstract: OAC Brooke is an indeterminate food-grade soybean (Glycine max [L.] Merr.) cultivar with high yield potential and high seed protein concentration. OAC Brooke is adapted to and recommended for soybean growing regions in southwestern Ontario with 3050 or greater crop heat units. OAC Brooke has a relative maturity of 2.2.

RCAT MatRix soybean

RCAT MatRix is a 2850 crop heat unit (CHU) soybean [Glycine max (L.) Merrill] cultivar with excellent yield potential, good lodging resist ance and tolerance to the herbicide glyphosate. It was developed by the Ridgetown Campus, University of Guelph, and is adapted to the 2800–3000 CHU areas of Ontario. RCAT MatRix was issued registration number 6000 on 2005 Nov. 01 by the Variety Registration Office, Plant Production Division of the Canadian Food Inspection Agency. Key words: Soybean, cultivar description

RCAT Dover soybean

RCAT Dover is a 3150 crop heat unit (CHU) soybean [Glycine max (L.) Merrill] cultivar with excellent yield potential and good lodging resistance. It was developed by the Ridgetown College, University of Guelph, and is adapted to the 3100–3400 CHU areas of Ontario. RCAT Dover was issued registration number 5342 on 2001 Feb. 04 by the Variety Registration Office, Plant Production Division of the Canadian Food Inspection Agency. Key words: Soybean, cultivar description

PRO 28-53 soybean

PRO 28-53 soybean [Glycine max (L.) Merrill] was developed by the Ridgetown College, University of Guelph, and was issued registration number 5569 on 2002 Dec. 12 by the Variety Registration Office, Plant Production Division of the Canadian Food Inspection Agency. PRO 28-53 has excellent yield potential and moderate lodging resistance, and is adapted to the 2800–3000 crop heat unit (CHU) areas of Ontario. Key words: Soybean, cultivar description