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Shahrokh Khanizadeh

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Shahrokh Khanizadeh and Andre Bédanger

Leaves of three strawberry cultivars (Bounty', `Honeoye', and `Kent') were collected at random from plants growing in an experimental trial at the Agriculture Canada, Research Station farm at Lavaltrie, Quebec. Steam-distillation was carried out on 300g of leaves in 3L of distilled water in a 5L flask. The essential oils were analyscd with a Varian 6000 gas chromatogmph. Thirty-seven compounds were detected of which sixteen were identified. The major components were linalool and nonanal. Many of the other constituents were aliphatic in nature. Differences in oil composition among the three cultivars were observed. Essential oil composition might therefore be used as a selection criteria for insect or disease resistance. Their effect upon mites will be assayed in future studies by testing them as sex, food, or oviposition lures.

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Shahrokh Khanizadeh and Jamshid Ghavami

UniBase is a Windows-based (95, 98, NT, 2000, or XP) user-friendly software package that was developed for those who are interested in creating their own instant databases, add information to an existing databases or import data and images from Excel in a choice of languages. The software is very useful for germplasm inventory (fruit crops, vegetables, ornamentals, agronomic crops, weeds, chemicals, insects, pests, animals, etc.) and can be used in any breeding program (animal, horticulture, agronomy, etc.) to trace pedigrees and view images and characteristics of progenies. The database can be searched using various criteria and the use of several operators. An unlimited number of images can be stored for each entry and several graphic formats including BMP, JPEG, GIF, TIFF, etc., can be used. Additional information on UniBase and available data and images can be obtained from the authors.

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Shahrokh Khanizadeh and Andre Belanger

Considerable variability in susceptibility to two-spotted spider mite (TSSM) were observed for the strawberry cultivars used as parents and some of our promising selections. Large variation was observed for 9-octadecenal oil composition followed by linalool, C9H1002, decanal, β-cyclocitral, α-terpineol and (Z)-3-hexenol. The purpose of this research was to identify the relative susceptibility of selected strawberry lines to TSSM in relation to leaf essential oil composition. One objective of our breeding program is the early identification of susceptible lines and/or seedlings so that they can be eliminated prior to field trials.

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Shahrokh Khanizadeh and Deborah J. Buszard

Promising 1989 strawberry selections from the Agriculture Canada/McGill Univ. breeding program have been evaluated since 1990 at three different sites in Quebec. `Kent', `Glooscap', `Honeoye', `Bounty', and `Veestar' were used for comparison. Yield, average fruit weight at each harvest, firmness, color, taste, and other fruit characteristics were evaluated. SJ89288-2 had the highest yield with large fruit. SJ89700-1 and SJ89264-6 produced similar yield to `Kent' and `Glooscap', with firm and large fruit. SJ89700-1 had bright red skin color and SJ89264-6 had bright pale red color. Both are suitable from fresh-market and pick-your-own (PYO). SJ8976-1, another selection, had a firm, large, bright pale red fruit. All four selections have good shelf life quality and will be tested at four sites during 1993–95.

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Shahrokh Khanizadeh and Mamdouh A. Fanous

Three mathematical indices were developed to estimate: 1) potential for early dollar return or early ripening (IE), 2) concentrated cropping (IC), and 3) deviation or similarity of a genotype to known cultivars (ID). Early ripening genotypes with high yield early in the season will have larger IE values than late genotypes with lower yield early in the season. Genotypes with few harvests will have larger IC values than those requiring several harvests. The ID index helps to identify and group genotypes with similar characteristics. These indices condense numerous values or arrays of traits into single index values, thereby simplifying genotype comparisons.

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Shahrokh Khanizadeh, Michel J. Lareau, and Deborah Buszard

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Raymond L. Granger, Shahrokh Khanizadeh, and Yvon Groleau

In 1988 a randomized complete block design with five blocks was used to evaluate the performance of four cultivars (`Empire', `Cortland', `Summerland McIntosh' and `Lobo') grafted on four rootstocks {Budagovsky(Bud.)9, Malling(M.)7,Ottawa(O.)3 and Malling Merton(M.M.)111}. The sixteen cultivar-rootstocks combinations were planted randomly at 2.5m apart in the row. The distance between the rows was 5m. The trees have been trickle irrigated every year and came into bearing in 1990. On the basis of cumulative yield efficiency the combination `Lobo'/O.3 was significantly superior to all others. The second best performer was `Empire'/O.3 followed by `Lobo'/Bud9. `Empire'MM.111, `Summerland McIntosh'/M.M.111, `Cortland'/M.M.111, `Summerland McIntosh'/M.7 and `Empire'/M.7 had the least cumulative yield efficiency. Generally the cultivar `Lobo' was superior to others and O.3 was the best rootstock followed by Bud.9, M.7 and M.M.111.