Effect of altering the physiological age of potato seed-tubers in the fall on subsequent production in a short-season environment

Knowles, N. Richard; Botar, Gabor I.

doi:10.4141/cjps92-033

Cited by 18 publications

(14 citation statements)

References 1 publication

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“…Variations in dormancy of potato cultivars contribute to the aging response to plant emergence, and ultimately to yield. Knowles and Botar (1991, 1992) also reported that day‐degrees accumulate in dormant tubers, resulting in earlier emergence and yield.…”

Section: Total Yield Comparisonmentioning

confidence: 92%

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The Effect of Seed‐Tuber Physiological Age and Cultivar on Early Potato Production

Asiedu¹,

Astatkie²,

Yiridoe³

2003

J Agronomy Crop Science

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Enhancing physiological aging of seed‐potatoes has the potential to substantially affect production, especially for short‐season growing areas. This study analysed the effect of seed‐tuber age and cultivar, jointly, to identify the combination for optimum early crop production, based on field experiments conducted at two locations in Nova Scotia, Canada. The potato cultivars Superior, AC‐Novachip, Niska, and Yukon Gold were aged by exposing seeds stored at 4 °C to warming periods of 0, 242 (3 weeks), and 484 (6 weeks) day‐degrees, prior to planting. Cultivar and age levels were completely randomized within each location and replicated four times. Harvest periods at 65, 80 and 95 days after planting (DAP) were analysed as an unbalanced split‐plot factorial, with year as a random blocking factor, location as a whole plot treatment, and cultivar and age crossed as subplot treatments. Total yield and marketable yield from Yukon Gold improved with physiological age when harvested early at 65 and 80 DAP, while that from AC‐Novachip improved when aged only 3 weeks. Niska was not affected by age. Overall, AC‐Novachip was consistently better than the remaining cultivars, regardless of age. The best treatment combination that maximized marketable yield was Yukon Gold aged 6 weeks planted at a commercial farm and harvested 95 DAP. For early harvest (65 DAP), however, AC‐Novachip aged 3 weeks and Yukon Gold aged 6 weeks generated the highest yields. Niska and Superior generated lower yield and higher culls.

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Section: Total Yield Comparisonmentioning

confidence: 92%

“…Thus, knowledge of the effects of advancing seed‐potato age on production has the potential to greatly benefit the potato industry in the area. Yet, there is limited information on the effect of physiological aging of potato seed‐tubers for short‐season growing areas (Knowles and Botar 1992), especially for Atlantic Canada.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Seed‐Tuber Physiological Age and Cultivar on Early Potato Production

Asiedu¹,

Astatkie²,

Yiridoe³

2003

J Agronomy Crop Science

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“…In conditions where the growing season is short, seed potatoes that are older and that have thus experienced a higher temperature sum due to a longer accumulation period are more productive (O'Brien et al, 1983;O'Brien et al, 1986;Knowles & Botar, 1992;Ezekiel, 2004). Northern origin or daylength do not affect yield capacity (Ezekiel, 1997;Johansen et al, 2002;Knowles & Knowles, 2006;Johansen et al, 2008).…”

Section: Effect Of Production Historymentioning

confidence: 99%

Effects of Production History and Gibberellic Acid on Seed Potatoes

Virtanen¹,

Häggman²,

Degefu³

et al. 2013

JAS

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In the present study effects of production history on tuber sprout, root, stem development and crop yield of seed potato cultivars Fambo and Van Gogh were investigated in the High Grade Area of Finland (64.9 N, 25.4 E). The haulms of seed potatoes were destroyed at the time of flowering (50 days after planting, DAP), three weeks after flowering (75 DAP) and as a control the haulm was left to natural death until harvest (95 DAP). The temperature sum accumulation of the seed potatoes was recorded for the growing season and storage period. In addition, the use of plant hormone gibberellic acid (GA) in sprout control was also investigated.The results indicated that cultivar properties had a greater effect on the sprouting and crop yield of seed potatoes than production-phased haulm killing or temperature sum accumulation. Haulm killing carried out at three weeks after flowering (75 DAP) accelerated the emergence of both cultivars significantly compared to killing at 50 DAP or 95 DAP. Gibberellic acid (GA) treatments significantly increased the number of sprouts and at lower concentration (100 mM) GA increased the number of tubers in the cultivar Fambo. Thus, the timing of haulm killing and in the case of Fambo, GA treatment influenced the characteristics of seed potatoes produced in the present study, revealing methods to improve seed potato production in the northern latitudes.

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“…Most of the evidence to support this comes from European studies on cultivaLrs that are not commerciallv important in the United States and Canada. Furthermore, plant growth response to advancing seed-tuber age is cultivar dependent (Van Der Zaag and Van Loon 1987). Excellent reviews of the growth responses of European cultivars to increased seed-hrber age are provided by Hartmans and Van Loon (1987), Van Es and Hartmans (1987), Bodlaender and Marinus (1987 (Knowles and Botar 1992).…”

Section: Research From the United States Andmentioning

confidence: 99%