Diploid True Potato Seed: Relationships among Seed Weight, Germination, and Seedling Vigor

The effect of potato spindle tuber viroid infection on pollen viability, fruit-set, botanical seed set, seed weight, and seed germination in potatoes was determined. Pollen collected from the infected cultivar 'Monona' was less viable than pollen collected from healthy plants. Pollen collected from infected plants reduced seed set significantly but did not reduce fruit development or seed set in all cultivars tested. For some cultivars, infected maternal plants increased the frequency of fruit development and seed weight compared with healthy controls. True potato seed from viroid-infected 'Katahdin' × 'Superior' crosses germinated at a higher rate than did seed from comparable uninfected parents. Progeny from viroid-infected parents that exhibited potato spindle tuber viroidlike symptoms did not always test positive for potato spindle tuber viroid by bioassay or polyacrylamide gel electrophoresis tests. Efficiency of potato spindle tuber viroid detection by bioassay was highest for seedlings 2 weeks after imbibition. Potato spindle tuber viroid was detected in 100% of the progeny tested after true potato seed was stored at 4 °C for 12 years. Tests on selfed true potato seed from the viroid-infected cultivar 'Monona' demonstrated a transmission rate of 100% after subinoculation of initial bioassay plants.

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STORAGE OF TRUE POTATO SEED

HortScience ◽

10.21273/hortsci.27.6.577c ◽

1992 ◽

Vol 27 (6) ◽

pp. 577c-577

Author(s):

Noël Pallais

Keyword(s):

Moisture Content ◽

Seed Dormancy ◽

Potato Seed ◽

True Potato Seed ◽

Seedling Vigor ◽

High Moisture ◽

Seed Moisture Content ◽

Moisture Contents ◽

Seed Moisture

True potato seed of Atzimba × 104.12LB (intermediate dormancy) was dried to seed moisture contents ranging from 3.85 to 12.5% (dry wt basis) and was stored for 2 years at 30, 15 and 5°C. Seed was tested for various germination and seedling vigor criteria at 4 month intervals. Seed dormancy and viability were better preserved at seed moisture levels below 7% and as temperature decreased. High moisture (>9%) was lethal to seed stored at 30°C. TPS should be stored at <5% seed moisture content. Under this condition seed dormancy in the genotype studied was lost after about 12 months at 30°C.

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Effect of mother plant-applied nitrogen and potassium on seed weight and seedling emergence of true potato seed

African Crop Science Journal ◽

10.4314/acsj.v8i4.27678 ◽

2000 ◽

Vol 8 (4) ◽

Cited By ~ 3

Author(s):

C. R. Kanzikwera ◽

D. S.O. Osiru ◽

J. S. Tenywa ◽

E. Adipala ◽

A. S. Bhagsari

Keyword(s):

Seed Weight ◽

Seedling Emergence ◽

Mother Plant ◽

Potato Seed ◽

True Potato Seed ◽

Applied Nitrogen

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Improving Seedling Vigor in Sexual Seeds of Potato Under High Temperature

HortScience ◽

10.21273/hortsci.26.3.296 ◽

1991 ◽

Vol 26 (3) ◽

pp. 296-299 ◽

Cited By ~ 2

Author(s):

Noël E. Pallais ◽

Nelly Y. Espinola ◽

Rosario M. Falcon ◽

Ruperto S. Garcia

Keyword(s):

High Temperature ◽

Warm Season ◽

Seed Storage ◽

Dry Weight ◽

Seed Priming ◽

The Other ◽

Potato Seed ◽

True Potato Seed ◽

Seedling Vigor ◽

Factor B

Sexual seeds of potato (Solanum tuberosum L.) usually emerge poorly under high-temperature conditions (> 25 C). A seedling vigor study was conducted during the warm season (1988-89) in Lima, Peru, and the results of two representative tests. are reported. Two presowing treatments and a rinsed control were compared for seedlingstand establishment in a screenhouse with old (>18 months) and new (> 6 months) sexual seeds of three potato crosses. The treatments consisted of soaking the seed in solutions of KN03 + K3P04 at – 1.0 MPa (priming) and gibberellic acid at 1500 ppm (GA1500). Seedling vigor was lower at 34C (February test) than at 29C (November test). In both tests, overall seedling performance was highest in seed of the cross Atlantic × LT-7. Old seed was more vigorous than new seed, particularly when the crosses Atzimba × R128.6 (B2) and Serrana × LT-7 (Cl) were tested at 34C. Priming increased percentage of early (10 days) emergence over the other treatments at 34C and increased seedling dry weight in both tests. GA1500 increased percentage of final (17 days) emergence in crosses B2 and Cl, as compared to rinsing, except at 29C, where there were no significant differences in old seed. For sowing true potato seed at high temperature, a) the genotype is a crucial factor, b) sufficient seed storage (> 18 months) may be essential, and c) seed priming is more effective than the standard GA1500 treatment.

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On-farm Development of Potato Production from True Seed in Indonesia

Experimental Agriculture ◽

10.1017/s0014479700022985 ◽

1992 ◽

Vol 28 (1) ◽

pp. 31-39 ◽

Cited By ~ 3

Author(s):

N. Gunadi ◽

M. J. Potts ◽

R. Sinung-Basuki ◽

Greta A. Watson

Keyword(s):

Production Systems ◽

Potato Production ◽

Production Costs ◽

Potato Seed ◽

True Potato Seed ◽

Yield Difference ◽

Tuber Crop ◽

On Farm ◽

Comparable Quality ◽

Better Than

SummaryThree seasons of on-farm experimentation to develop potato production from botanical or true potato seed (TPS) under cool fertile conditions in West Java, Indonesia, are described. Twenty-three farmers experimented with two production systems: use of transplants, and use of seedling tubers produced in nursery beds. There was little yield difference between the systems, but an apparent progeny × system × season interaction was observed. All progenies were more resistant to late blight than the present cultivars grown from tubers. Appropriate matching of progeny and system gave seed of comparable quality with, but total yields slightly less than, certified imported seed of cv. Granola. Ware quality was slightly better than that of cv. Granola. Production costs were markedly less than for a tuber crop, making TPS ideal for small, resource-poor farmers.

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