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André Snyder, Matthew J. Morra, Jodi Johnson-Maynard, and Donald C. Thill

Brassicaceae seed meals (BSMs) are byproducts of edible and industrial-grade oil production from crops such as canola/rapeseed ( Brassica napus L.) and mustard (e.g., Brassica juncea L. and Sinapis alba L.). Brassicaceae oilseeds contain 30% to

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Elina Yankova-Tsvetkova, Ivanka B. Semerdjieva, Rozalia Nikolova, and Valtcho D. Zheljazkov

crops that could be produced on marginal lands. Some species of genus Lepidium of the family Brassicaceae are ruderal plants and produce seeds rich in fatty acid oils ( Eriksson and Merker, 2011 ; Merker et al., 2010 ). The genus Lepidium L

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Victoria J. Ackroyd and Mathieu Ngouajio

the government. Cover crops in the Brassicaceae family (brassica) such as oilseed radish, oriental mustard, and yellow mustard have been shown to decrease plant pathogen populations in the soil ( Sarwar et al., 1998 ). Cover crops in general provide a

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Heather D. Toler, Craig S. Charron, Carl E. Sams, and William R. Randle

Plants in the family Brassicaceae play integral roles in the diets of the world's population. Brassica oleracea , for example, includes the following staple food cultivars: cabbage, broccoli, cauliflower, kale, kohlrabi, and brussels sprouts

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Chase Jones-Baumgardt, David Llewellyn, Qinglu Ying, and Youbin Zheng

cycles, and high market value, with wholesale prices ranging from $30 to $50 USD per pound ( Treadwell et al., 2016 ). The Brassicaceae family are especially popular to grow as microgreens because of their ease of germination, short growth cycles, varying

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Stephen M. Olson and Joshua H. Freeman

Collard greens are a primitive member of the Brassicaceae that are grown for their rosette of thick, dark green leaves, which are eaten primarily as cooked greens or pot herbs. Collards, along with most greens, are an excellent source of fiber

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S. Alan Walters and Elizabeth A. Wahle

Horseradish is a hardy perennial that is a member of the Brassicaceae family and is grown for its white, thickened, and pungent roots ( Rubatzky and Yamaguchi, 1997 ). The large primary roots are fleshy with a smooth or corky surface. The intense

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Eduardo A.S. Rosa and Ana S. Rodrigues

Broccoli (Brassica oleracea L. Italica Group) is an economically important vegetable crop and its consumption may benefit human health. Glucosinolates, a group of secondary plant metabolites found generally in the cultivated Brassicaceae, may protect against the development of certain malignancies. The objective of this study was to evaluate total and individual glucosinolate content of broccoli cultivars widely grown in southern Europe following spring vs. summer planting (early vs. late crop, respectively). Glucosinolates in primary and secondary inflorescences taken from mature plants were analyzed separately by high performance liquid chromatography (HPLC). The cultivars contained primarily 4-methylsulfinylbutyl-, indol-3-ylmethyl- and 1-methoxyindol-3-ylmethyl-glucosinolates. Total and individual glucosinolate levels varied significantly between seasons, among cultivars and between inflorescences. `Shogun' contained the highest total glucosinolate levels (between 35.2 mmol·kg-1 dry weight in primary inflorescences of the early crop and 47.9 in secondary inflorescences of the late crop). Total and individual glucosinolate levels were generally higher in the late than in the early crop. Primary inflorescences generally contained the highest glucosinolate levels in the early crop but secondary inflorescences had the highest levels in the late one.

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David A. Dierig, Pernell M. Tomasi, and Dennis T. Ray

Lesquerella fendleri (Gray) Wats. (lesquerella, Brassicaceae), native to the southwestern United States, is a potentially useful industrial oilseed crop. The seed oil contains hydroxy fatty acids, similar to castor (Ricinus communis L.) seed oil. The unique properties of the oil, along with coproducts, allow additional applications that would not compete with castor oil. Plants with vestigial anthers (male-sterile) were discovered in a greenhouse-grown, nonselected population in 1993. The inheritance of the trait was investigated through four crop seasons. Crosses were made among male-sterile and male-fertile plants from an open pollinated population, thus, they were heterozygous for many traits. Statistical analysis indicated that male sterility is expressed as a result of two nonlinked nuclear genes with epistatic relations and different cytoplasms, which cause partial or total fertility restoration. These ratios fit a 13:3 epistatic ratio, indicating that male sterility is controlled by homozygous recessive alleles at one locus in combination with at least one dominant allele at the second locus, i.e., ms1ms1 Ms2_. Some cross results were skewed in favor of fertile phenotypes presumably due to cytoplasmic effects causing partial fertility restoration. Male-sterile lines could be used for hybrid development and this information will be helpful in implementing a strategy for hybrid development. Hybrid plants and higher yields will enhance the potential for commercialization of this new alternative crop.

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Bruce L. Dunn and Carla Goad

Leaf nitrogen (N) and contact optical sensor sampling methods vary in the literature. Thus, the objective of this study was to determine the best sampling procedure for correlating leaf N concentration to contact optical sensor readings. To investigate this, fertilizer rates of 0, 5, 10, or 15 g of 16N–9P–12K were applied as a topdress application on ornamental cabbage (Brassica oleracea L.) ‘Tokyo Red’. Soil plant analysis development (SPAD) and atLEAF chlorophyll meters were used every week for 5 weeks starting 30 days after planting. For each pot, SPAD and atLEAF measurements were taken from a single mature leaf from the middle to upper level of the plant at the leaf tip, blade, or base of the leaf not including the midrib. Weekly leaf foliar analysis consisted of collecting either fully developed leaves from a single plant, five plants, or 10 plants per, using only the tip, blade, or base of three leaves for total leaf N concentration per treatment. A significant position affect was seen in both SPAD and atLEAF sensors. For SPAD, sensor readings taken from the tip and blade of a leaf were not significantly different from each other but were significantly different from the base of the leaf. All three positions for atLEAF were significantly different from each other. This indicates that sensor sampling location within a leaf will affect readings. A significant difference was observed among leaf sampling methods. Taking leaf samples from the tip and base had the highest leaf N concentrations and were not significantly different from each other but were significantly different from all other sampling methods, which were not significantly different from each other. Significant correlations were seen among all combinations of sensor positions and leaf N sampling methods except SPAD readings taken from the tip and leaf sampling from a single plant. Highest correlations (r = 0.7 to 0.8) were seen when SPAD readings were taken from the base of the leaf irrespective of leaf sampling method. Based on this experiment, either sensor could be used for correlating leaf N; however, growers should consistently collect sensor readings from the same location on a leaf to achieve consistent values and correlations.