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Abstract

Intact roots of 109 radish (Raphanus sativus L.) cultivars were analyzed for glucosinolates (GS’s) and found to contain primarily 4-methylthio-3-butenyl-GS with small amounts of 4-methylsulfinylbutyl-, 4-methylsulfinyl-3-butenyl-, and 3-indolylmethyl-GS’s. Cultivars included oil radishes (ssp. oleifera) and food radishes (ssp. radicola) available in European, European-American, Japanese, and Korean markets. Regarding total GS’s, 80% or more of the red European-American radishes had 100-199 pmole/100 g, the Korean 100-299, and the Japanese 200-399. No correlation was found between root size and 4-methylthio-3-butenyl-, 3-indolylmethyl-, or total GS’s. Japanese radish peelings contained significantly greater concentrations of these 3 constituents than did the peeled root.

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green) ( Myers and Baggett, 1999 ). Snap bean cultivars also differ regarding growth habit, where determinate bush cultivars are used for mechanical harvest because they maximize the quantity of mature pods at one harvest date and indeterminate pole

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from China 1000 years ago ( Masuda et al., 2006 ). Approximately 350 cultivars of lotus are known in Japan, including more than 100 landraces ( Kubo et al., 2009 ). In China, the lotus has been cultivated for more than 3000 years, and rich germplasm

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Leaf isozyme banding patterns were studied in 30 cultivars and selections of lychee (Litchi Chinensis Sonn.) by means of starch gel electrophoresis. Polymorphism in aconitase, aspartate aminotransferase, isocitrate dehydrogenase, phosphoglucomutase, shikimate dehydrogenase, superoxide dismutase and triosephosphate isomerase is demonstrated for the first time and observations are extended for the previously described polymorphism in phosphoglucose isomerase. In this study we found five groups of cultivars with identical electrophoretic genotypes. The 18 different cultivars were clustered by the UPGMA method into two large clusters and three pairs of similar cultivars. Three cultivars were relatively separate from the clusters. This study shows that isozyme polymorphism is a prevalent phenomenon in lychee, and that isozymes can provide useful genetic markers for lychee cultivar identification and parental analysis.

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Four field experiments were conducted during 1988 to 1990 to evaluate the response to fertilizer P of six crisphead lettuce (Latuca sativa L.) cultivars grown on Histosols. There were season × cultivar interactions for total mass produced, marketable yield, and P uptake by lettuce. A significant yield response to fertilizer P was demonstrated during all four seasons. The performance of individual cultivars within a given season led to cultivar × P rate interactions for marketable yield. However, there were no significant P rate × cultivar interactions for total mass produced, P uptake, and marketable yield during the one season when growing conditions were near ideal. Calculated critical soil-test P values for both eastern and western lettuce types produced in Florida were all within error currently associated with P fertilizer recommendations for lettuce produced in Florida. Therefore, we conclude that no immediate change in P fertilizer recommendations is required for the new western-type lettuce cultivars produced on Histosols in Florida.

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Pollen samples of 155 olive (Olea europaea L.) cultivars from different origins were analyzed to study isoenzymatic variability in five enzyme systems: alcohol dehydrogenase (ADH), esterase (EST), glucose phosphate isomerase (GPI), leucine aminopeptidase (LAP), and malic enzyme (ME) using starch gel electrophoresis. Polymorphism was observed in all of the isozyme systems. ME, GPI, EST, and LAP were the most useful systems for identification of cultivars. Different combinations of banding patterns of these systems allowed us to identify 85% of the cultivars. The remainder were separated into groups of two or three cultivars that could be identified using morphological characteristics. No intracultivar polymorphisms were observed.

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affecting plant survival and crop yield ( Kudo et al., 2017 ). The effects of drought stress on plants depend on the intensity and duration of drought stress and the tolerance of cultivars ( Marcek et al., 2019 ). The stomatal conductance ( g S ) of leaves

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, Ligustrae , Ligustrina , Pubescentes , and Villosae ( Li et al., 2012 ). Most species are native to eastern Asia while two species, S. vulgaris and S. josikaea , are native to southeastern Europe ( Kim and Jansen, 1998 ). Most cultivar development

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the development of resistant cultivars. Knowledge of the diversity of the pathogen is critical to ensure that potential new cultivars are tested against a wide a range of pathotypes. However, information on the genetic variation of Fof across

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season ( Sukkasem et al., 2013 ). Brassica napus cultivars had higher oil content in spring than in winter ( Amir et al., 2012 ). Salinity stress increased oleic acid while decreasing linoleic and linolenic in Carthamus tinctorius . It is therefore

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