David Wolyn

Professor Ontario Agricultural College Department of Plant Agriculture Guelph, Ontario dwolyn@uoguelph.ca Office: (519) 824-4120 ext. 53092

Bio/Research

Homeotic Cytoplasmic Male Sterility in Carrot :Cytoplasmic male sterility (CMS) in carrot is manifested as homeotic phenotypes, where stamens are replaced by petals, or both stamens and petals are replaced by green, bract-like organs. Nuclear restorer and maintainer genes also interact with cytop...

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Bio/Research

Homeotic Cytoplasmic Male Sterility in Carrot :Cytoplasmic male sterility (CMS) in carrot is manifested as homeotic phenotypes, where stamens are replaced by petals, or both stamens and petals are replaced by green, bract-like organs. Nuclear restorer and maintainer genes also interact with cytoplasm to affect phenotype. Since the mitochondrion is thought to be responsible for CMS, one can hypothesize that a mitochondrial signal affects the expression of nuclear homeotic genes important for floral development. We are currently dissecting components of this signaling pathway through molecular genetic approaches.

Asparagus Breeding and Production :Asparagus is dioecious; gender is controlled by the M locus. Male and female plants are Mm and mm, respectively, and all-male hybrids are produce by crossing a female with a supermale (MM). We conduct asparagus breeding to develop all-male hybrid varieties with improved yield, quality and disease resistance, adapted to Canadian growing conditions.

Research is also being pursued in physiology and production. Experiments are in progress to understand physiological relationships between winter hardiness and timing of fall senescence or induction of dormancy. Our goal is to discover basic knowledge that will enhance breeding efforts. In addition, the effects of plant growth-promoting rhizobacteria on productivity, especially under stress, are being studied; new information can lead to improved production practices for growers.


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Media Relations

Lori Bona Hunt
l.hunt@exec.uoguelph.ca
519-824-4120 ext. 53338