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Arugula Bolting Resistance Selection Project

Mario Morales and Jules Janick

In 1999 seedlines of arugula (check mario for source) were screened in the greenhouse by exposing plants to continuous daylength. Selections were made and seed was harvested from each plant, but seed production was low and erratic. The same population was planted in the field and further selections were made. These selections will be tested in 2001.

In February 2001 greenhouse screening under continuous daylength was initiated from 4 lines. Line one was derived from an Italian seed source (Cultivated Arugula). Data is being taken on date of flowering. Photographs of bolting and leaf type are shown below. All photographs were taken on 03/19/2001.

The first potential release is now in field trials with a commercial seed company.

Leaf morphology

Leaf morphology

Bolting and non-bolting arugula

Bolting and non-bolting arugula, note flower on right

Genotypic bolting response in arugula seedlings

Genotypic bolting response in arugula seedlings

Leaf phenotypes in arugula

Leaf phenotypes in arugula

Evaluating arugula bolting

Evaluating arugula bolting

Arugula bolting resistance selection experiment

Arugula bolting resistance selection experiment

arugula flower

Arugula flower

Arugula Trials and Selection Results

West Lafayette, Summer 2003

Arugula beds. Arugula after first cut.
Flowering arugula. Late blooming selections intercrossed in greenhouse.
Silques (seed pods) produced from intercross. Results of selection. Non flowering selection (left) compared with control (right).