Gemson
Since its commercial release in 2007 Gemson has gone from strength to strength in the expanding baby potato sector. Gemson is renowned for producing exceptional small, white, round and bright tubers, perfect for the packing industry and of the same standard as current sector leader Maris Peer.
Gemson is comparable in every way with the widely known Maris Peer except in yield and tuber number where Gemson excels compared to its main rival. Trial and commercial field scale results have shown that Gemson can produce more than 60% greater yield in the desirable <45mm fraction while also demonstrating a smaller percentage of waste in the form of outgrades and oversize, producing consistently excellent results for both growers and packers of the variety.
THE SUPERIOR CHOICE BABY POTATO
HISTORY
- Breeder:
- SCRI
- Market Outlet:
- UK Babies, France, Scandinavia, North Africa, Middle East
- Parentage:
- SCRI.85.C.4d.8 x Maris Peer
- Introduction:
- 2007
KEY VARIETY POINTS
- Very high tuber number variety with few in the oversize bracket
- Average of 25 tubers per plant v’s 16 of Maris Peer
- Lower seed rates than main rival Maris Peer with a higher marketable yield
- Very resistant to Blackleg
- Good resistances to both common and powdery scab
- Long natural dormancy
CONTACT
- Telephone:
- 01674 832022
07802 534454 - Email:
- murdie@grampiangrowers.co.uk
DISEASE & PEST RESISTANCE
| Gemson | Peer | |
|---|---|---|
| Leaf Roll | 9 | 4 |
| A-Virus | – | – |
| X-Virus | – | – |
| Y-Virus | 4 | 3 |
| Foliage Blight | 4 | 4 |
| Tuber Blight | 2 | 4 |
| Blackleg | 8 | 4 |
| Powdery Scab | 7 | 6 |
| Wart Disease | I | I |
| Potato Cyst Nematode Ro1 | 2 | 2 |
| Potato Cyst Nematode Pa2,3 | 1 | 2 |
| Common Scab | 5 | 5 |
| Dry Rot | 3 | – |
| Spraing | – | – |
| Other internal defects | 8 | – |
| Slugs | – | – |
| Black Scurf | 6 | – |
AGRONOMIC CHARACTERISTICS
| Gemson | Peer | |
|---|---|---|
| Maturity | 5 | 5 |
| Skin Colour | Y | C |
| Flesh Colour | 5 | 5 |
| Tuber Shape | 6 | 4 |
| Eye Depth | 7 | 6 |
| Uniformity | 6 | 6 |
| Tuber Numbers | 4 | 4 |
| Freedom from outgrades | 7 | 6 |
| Yield | 9 | 8 |
| Dry Matter Content | 6 | 4 |
| Dry Matter % | 20 | 17 |
| Dormancy | 6 | 5 |
| Drought resistance | 7 | 6 |
| Damage | 7 | 7 |
| Bruising | 7 | 5 |
Planting Details
DUAL PURPOSE
| Tuber Count | Plant Pop | t/ha | t/ac | 72″ Beds (cm) | 72″ Beds (in) |
|---|---|---|---|---|---|
| 400 | 57,531 | 7.19 | 2.91 | 19.3 | 7.6 |
| 500 | 59,583 | 5.96 | 2.41 | 18.6 | 7.3 |
| 600 | 61,787 | 5.15 | 2.08 | 18.0 | 7.1 |
| 700 | 64,160 | 4.58 | 1.86 | 17.3 | 6.8 |
| 800 | 66,723 | 4.17 | 1.69 | 16.7 | 6.6 |
| 900 | 69,496 | 3.86 | 1.56 | 16.0 | 6.3 |
| 1,000 | 72,515 | 3.63 | 1.47 | 15.3 | 6.0 |
| 1,100 | 75,806 | 3.45 | 1.40 | 14.7 | 5.8 |
| 1,200 | 79,409 | 3.31 | 1.34 | 14.0 | 5.5 |
| 1,300 | 83,372 | 3.21 | 1.30 | 13.3 | 5.2 |
| 1,400 | 87,752 | 3.13 | 1.27 | 12.7 | 5.0 |
BABY PRODUCTION
| Tuber Count | Plant Pop | t/ha | t/ac | 72″ Beds (cm) | 72″ Beds (in) |
|---|---|---|---|---|---|
| 400 | 63,285 | 7.91 | 3.20 | 17.6 | 6.9 |
| 500 | 65,542 | 6.55 | 2.65 | 17.0 | 6.7 |
| 600 | 67,966 | 5.66 | 2.29 | 16.3 | 6.4 |
| 700 | 70,576 | 5.04 | 2.04 | 15.7 | 6.2 |
| 800 | 73,395 | 4.59 | 1.86 | 15.1 | 6.0 |
| 900 | 76,448 | 4.25 | 1.72 | 14.5 | 5.7 |
| 1,000 | 79,767 | 3.99 | 1.61 | 13.9 | 5.5 |
| 1,100 | 83,386 | 3.79 | 1.53 | 13.3 | 5.2 |
| 1,200 | 87,350 | 3.64 | 1.47 | 12.7 | 5.0 |
| 1,300 | 91,709 | 3.53 | 1.43 | 12.1 | 4.8 |
| 1,400 | 96,527 | 3.45 | 1.40 | 11.5 | 4.5 |
FERTILISER REQUIREMENTS KGS/HA
| Planting | Top dressing | Total | |
|---|---|---|---|
| Nitrogen | (N) | 100-120 | 120 |
| Phosphate | (P2O5) | 225 | 225 (Soil index 1 or L) |
| Potash | (K2O) | 160 | 160 (Soil index 1 or L) |