Postharvest sweetening of potato seed tubers and effects on their yield performance

Performance of potato seed tubers of first, second, third, fourth, and fifth generations were evaluated against PVY and PLRV. Potato plants grown from first generation seed tubers were free from PVY infection. Incidence of the virus was the minimal at second generation, which increased afterwards steadily by third, fourth, and fifth generations. Incidence of PLRV was minimal at first generation. It increased gradually with the advancement of generation seed tubers showing the highest incidence at fifth generation. The highest plant growth and tuber yield were recorded at second generation, which was followed by third, fourth, and fifth generations. The highest reduction in plant height, tuber number, and tuber yield were recorded in 5th generation due to infection of PVY and PLRV. Keywords: Generation evaluation; PVY; PLRV; growth; yield; potato DOI: 10.3329/bjar.v35i1.5865Bangladesh J. Agril. Res. 35(1) : 37-50, March 2010

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Age of potato seed-tubers influences protein synthesis during sprouting

Physiologia Plantarum ◽

10.1034/j.1399-3054.1993.890203.x ◽

1993 ◽

Vol 89 (2) ◽

pp. 262-270 ◽

Cited By ~ 1

Author(s):

G. N. Mohan Kumar ◽

N. Richard Knowles

Keyword(s):

Protein Synthesis ◽

Potato Seed ◽

Seed Tubers

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Determination of optimum tuber planting density in the potato varieties Pentland Squire, Cara, Estima, Maris Piper and King Edward

The Journal of Agricultural Science ◽

10.1017/s0021859600071525 ◽

1992 ◽

Vol 119 (1) ◽

pp. 35-44 ◽

Cited By ~ 7

Author(s):

D. C. E. Wurr ◽

J. R. Fellows ◽

E. J. Allen

Keyword(s):

Complex Analysis ◽

Seed Tuber ◽

Tuber Size ◽

Planting Density ◽

Potato Seed ◽

Stem Density ◽

Seed Tubers ◽

Net Returns ◽

Analysis Technique ◽

The Cost

SummaryThirty-two experiments examining the effects of the weight and within-row spacing of potato seed tubers on graded tuber yields of five varieties were conducted on eight sites from 1980 to 1985. A complex analysis technique was used to combine these data and estimate the optimum tuber planting densities for different ratios of seed cost to small (40–60 mm) and large (60–80 mm) ware value. The same technique could be applied to any other combination of seed cost, ware size and ware value.The optimum tuber planting density decreased with increasing seed-tuber weight. Differences in optimum planting density between varieties were much greater with small (35 g) than with large (105 g) seed tubers and decreased as the cost of seed increased relative to the value of ware. As large ware became worth more than small ware the influence of increasing seed cost on the optimum density was reduced. As the value of large ware increased, net returns increased and the effect of seed cost on net returns was reduced. Mean tuber size decreased with increasing stem density at harvest and at the same stem density was lower in varieties producing more daughter tubers/stem. Changes of mean tuber size (μ) and the spread of yield across size grades (σ) with time were well described by parallel curves in different varieties. It is suggested that in future it may not be necessary to determine optimum tuber planting densities by complex experiments involving several seed-tuber weights and spacings. Instead μ and σ could be estimated from simple experiments and tuber spacings determined by comparison with control varieties.

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Effects of Gibberellic Acid (GA3) on Sprouting and Quality of Potato Seed Tubers in Diffused Light and Pit Storage Conditions

Journal of Biological Sciences ◽

10.3923/jbs.2006.723.733 ◽

2006 ◽

Vol 6 (4) ◽

pp. 723-733 ◽

Cited By ~ 3

Author(s):

Solomon I. Shibairo . ◽

Paul Demo . ◽

Jackson N. Kabira . ◽

Peter Gildemacher . ◽

Esther Gachango . ◽

...

Keyword(s):

Gibberellic Acid ◽

Storage Conditions ◽

Potato Seed ◽

Seed Tubers ◽

Diffused Light

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Seed Borne Late Blight of Potato

Plant Health Progress ◽

10.1094/php-2002-0129-01-hm ◽

2002 ◽

Vol 3 (1) ◽

pp. 14 ◽

Cited By ~ 5

Author(s):

Mary L. Powelson ◽

Robin Ludy ◽

Heather Heather ◽

Debra A. Inglis ◽

Babette Gundersen ◽

...

Keyword(s):

Late Blight ◽

Seed Piece ◽

Transmission Rate ◽

Seed Transmission ◽

Management Program ◽

Healthy Plant ◽

Potato Seed ◽

Stand Establishment ◽

Seed Tubers ◽

Healthy Seed

Planting of potato seed pieces infected with Phytophthora infestans can lead to the introduction of late blight within a planting. When infected seed pieces are planted, there are three resulting scenarios: (i) a healthy plant emerges, (ii) no plant emerges because of the rapid decay of the seed piece, or (iii) a symptomatic plant emerges. A major factor favoring stand establishment and seed transmission is the severity of seed piece infection. When infection is severe, stand is compromised and transmission rate is low. When infection is mild, the plant emerges before the seed piece decays and, in some instances, the pathogen makes its way from the seed piece to the plant where a stem lesion is formed. Diseased seed tubers are the principle source of late blight inoculum for infection of healthy seed pieces. Treatment of infected or blighted seed tubers with a seed dressing with activity against P. infestans is not a viable tactic because the products are ineffective against established infections. Conversely, treatment of healthy seed pieces provides a high level of protection against late blight spores that are spread during the seed handling and planting operations. Optimum effectiveness is achieved when products are applied immediately following cutting, as none are effective against established infections. Seed treatment reduces the risk of seed transmission of late blight and enhances stand establishment and plant vigor. This tactic should be an important component of an integrated late blight management program. Accepted for publication 16 January 2002. Published 29 January 2002.

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