Yield of Yellow Onion Cultivars in Eastern Oregon and Southwestern Idaho

Shock, Clinton C.; Ishida, Joey; Eldredge, Eric P.; Seddigh, Majid

doi:10.21273/horttech.10.3.613

Cited by 11 publications

(13 citation statements)

References 4 publications

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“…2000, and on 22 Mar. 2001. In 2000and 2001, seed was planted in single rows on 22-inch (55.9 cm) beds.…”

Section: Methodsmentioning

confidence: 99%

“…By year, the percentage of jumbo bulbs increased as the percentage of super colossals decreased. Averaging over only the 17 cultivars that were in the trials all 3 years, the percentage of bulbs that were jumbo averaged 23%, 37%, and 47% in 2000, 2001, and 2002, respectively. Onion losses to neck rot in storage averaged 5.1%, 7.7%, and 0.3% in 2000, 2001, respectively. In 2000 had more than 10% neck rot.…”

Section: Functionally Single-centeredmentioning

confidence: 99%

“…ach year onion is produced on about 20,000 acres (8094 ha) in eastern Oregon and southwestern Idaho, with a total value of $97 million, $85 million, and $94 million in 2000, 2001, respectively [U.S. Department of Agriculture (USDA), 2003]. These onions are mostly yellow long-day cultivars and are marketed fresh in August and September and from storage through April (Shock et al, 2000). The onion production area is within a radius of 30 miles (48.3 km) of Ontario, Ore., on the Snake River plain and along the tributaries of the Snake River, a region frequently referred to as the Treasure Valley.…”

mentioning

confidence: 99%

“…Since 1972, established cultivars and new onion lines for commercial production in eastern Oregon and south-western Idaho have been evaluated in replicated yield trials conducted at the Malheur Experiment Station near Ontario, Ore. Characteristics that have been evaluated in these trials include bulb yield and size, maturity rating, potential for bolting, and susceptibility to neck rot (Botrytis allii) and plate rot (Fusarium oxysporum) diseases. Results of the 1996 and 1997 trials were reported (Shock et al, 2000). Starting in 2000, two additional cultivar characteristics were evaluated: super colossal size bulbs and bulb single centeredness.…”

mentioning

confidence: 99%

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Single-centered and Super Colossal Bulbs from Yellow Onion Cultivars

Shock¹,

Feibert²,

Saunders³

2005

horttech

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Onion (Allium cepa) cultivars for commercial production in eastern Oregon and southwestern Idaho are evaluated annually in replicated yield trials conducted at the Malheur Experiment Station, Oregon State University, Ontario. Market demand has progressively called for larger bulb size and bulbs with single centers. At harvest onions were evaluated for maturity, number of bolters, and single centeredness. Cultivars showed a wide range of bulbs with only one growing point or “bullet” single centers, ranging from 1% to 57% in 2000, from 7% to 70% in 2001, and from 1% to 74% in 2002. The percentages of bulbs functionally single-centered for processing uses ranged from 18% to 88% in 2000, from 24.7% to 91.3% in 2001, and from 14.4% to 92% in 2002. Bulb yield and market grade were evaluated out of storage. Marketable yield after 4 months of storage varied significantly by cultivar from 643 to 1196 cwt/acre (72.1 to 134.1 Mg·ha–1) in 2000, from 538 to 980 cwt/acre (60.3 to 109.8 Mg·ha–1) in 2001, and from 583 to 1119 cwt/acre (65.3 to125.4 Mg·ha–1) in 2002. Averaging over cultivars, super colossal bulb size averaged 26%, 14%, and 10% in 2000, 2001, and 2002, respectively.

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“…2000, and on 22 Mar. 2001. In 2000and 2001, seed was planted in single rows on 22-inch (55.9 cm) beds.…”

Section: Methodsmentioning

confidence: 99%

Section: Functionally Single-centeredmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Single-centered and Super Colossal Bulbs from Yellow Onion Cultivars

Shock¹,

Feibert²,

Saunders³

2005

horttech

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“…Characteristics that have been evaluated in these trials include bulb yield and size, maturity rating, potential for bolting, and susceptibility to neck rot (Botrytis allii and Botrytis aclada) and plate rot (Fusarium oxysporum f. sp. cepae) diseases (Shock et al, 2000). Starting in 2000, two additional variety characteristics were evaluated: super colossal size bulbs (>4¼ inches diameter) and single-centered bulbs (Shock et al, 2005a).…”

mentioning

confidence: 99%

Onion Variety Response to Iris Yellow Spot Virus

Shock

Feibert

Jensen

et al. 2008

hortte

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Onion (Allium cepa) varieties for commercial production in eastern Oregon and southwestern Idaho are evaluated annually in replicated trials conducted at the Malheur Experiment Station, Oregon State University, near Ontario, Oregon. Characteristics evaluated include bulb yield, market grade, and the frequency of single centers. After the emergence of iris yellow spot virus (IYSV) as a threat to commercial onion production in the early 2000s, onion varieties at the Malheur Experiment Station have been evaluated for virus symptoms since 2004. Varieties showed differences in the severity of IYSV symptoms each year. Symptom severity increased over the years from 2004 to 2006, and variety virus ratings showed a strong negative correlation of severity with yield in 2005 and 2006. Marketable yield after 3 months of storage averaged 781, 534, and 551 cwt/acre in 2004, 2005, and 2006, respectively. Averaging over varieties, yield of bulbs larger than 4 inches in diameter was 438 cwt/acre, 56 cwt/acre, and 76 cwt/acre, and the average virus severity ratings were 1.1, 1.3, and 2.7 in 2004, 2005, and 2006, respectively. A few varieties showed a combination of high yield, large bulb size, low incidence of virus symptoms, and a predominance of single-centered bulbs. With the prevalence of IYSV, variety tolerance to IYSV has become an important production factor in the Treasure Valley.

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Evaluation of forty-five cultivars as affected by bulb initiation, bulb and scale characteristics, and bulb minerals and organic compounds of intermediate-day yellow onion (Allium cepa L.) in South Korea

Kim

Kwon

Chang

et al. 2020

Hortic. Environ. Biotechnol.

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We evaluated and classified forty five onion cultivars according to bulb initiation, bulb and scale characteristics, minerals and organic compounds contents, and storage quality in South Korea during 2016/2017 and 2017/2018 growing seasons. Field experiment was conducted in randomized block design with three replications. Bulb initiation ranged from 153 days after transplanting (DAT, April 2) to 177 DAT (April 26). Fresh bulb weight (FBW) and bulb index (BI) were 285.5 ± 18.5 g/ individual, 0.93 ± 0.05, respectively. Number of scales (NS), number of center (NC), and scale thickness (ST) were 7.6 ± 0.2, 2.3 ± 0.2, and 5.5 ± 0.2 mm/scale, respectively. Chroma and Lightness of bulb skin were 27.1 ± 1.9, 61.2 ± 2.3, respectively. Storage loss (SL) on December 12 was 19.4 ± 5.9%. Nitrogen (N), Carbon (C) and sulfur (S) contents were 1.36 ± 0.14, 37.9 ± 3.2 and 0.40 ± 0.06 mg kg −1 on a fresh weight basis. Total soluble solids (TSS) and total phenolics content (TPC) were 8.6 ± 0.6 °Bx, 164.8 ± 15.6 mg GE kg −1 on a fresh weight basis. Days from transplanting to bulb initiation was significantly positively correlated with bulb height, NC, dry matter, N, C, S, TSS, TPC, total flavonoids content (TFC) etc., while it was negatively correlated with rot loss and SL. Dry matter content was significantly positively correlated with N, C, S, TSS, TPC, TFC etc., while it was negatively correlated with SL. Storage loss was negatively correlated with N, S, Potassium and TSS. Dendrogram of agglomerative hierarchical clustering for the forty five cultivars based on bulb initiation, bulb and scale characteristics, and bulb minerals and organic compounds contents classified five cultivar groups. Cluster 1 featured the earliest bulb initiation and the greatest SL. Cluster 2 featured the fewest NS and NR, and the thickest ST. Cluster 3 featured the greatest FBW, and the most NS and NC. Cluster 4 featured the greatest BI and the thinnest ST. Cluster 5 featured the lowest SL, and the highest minerals and antioxidant compounds contents. This information should be helpful for onion growers to decide onion cultivar and for onion breeders to promote new cultivars depending on their purpose.

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Yield of Yellow Onion Cultivars in Eastern Oregon and Southwestern Idaho

Cited by 11 publications

References 4 publications

Single-centered and Super Colossal Bulbs from Yellow Onion Cultivars

Single-centered and Super Colossal Bulbs from Yellow Onion Cultivars

Onion Variety Response to Iris Yellow Spot Virus

Evaluation of forty-five cultivars as affected by bulb initiation, bulb and scale characteristics, and bulb minerals and organic compounds of intermediate-day yellow onion (Allium cepa L.) in South Korea

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