Schriften zu Genetischen Ressourcen - Genres

U. FREYTAG, G.H. BUCK-S ORLIN and B. SCHMIDT
2) PHA 6018: var. nanus ‘Michelite’: Virides with strings; qualified cultivar in France
and the Netherlands.
3) PHA 6019: var. nanus ‘Redlands Greenleaf B’: Virides with strings.
4) PHA 6020: var. nanus ‘Dubbele Witte’: Virides with strings; pods 10-12 cm long,
narrow to medium broad, flat oval, seed locations clearly marked, weakly to medium
bending; pod whitish-green, seed very full, white to greyish-white, often with
brown spots.
5) PHA 6021: var. vulgaris ‘Great Northern U.I. 31’. Virides with strings.
6) PHA 6022: var. nanus ‘Pinto 114’: Virides without strings.
Cultivation – growing conditions
Germination in bean takes places within a temperature frame of 10 to 37°C. Planting
seeds outdoors can be done only when the medium daily temperature is 12-18°C
(which is the case in Gatersleben at the beginning of May). Seedling emergence in
the field requires, along with a soil temperature of at least 9°C, 7-14 days of 10-14°C
air temperature. This ensures good seed maturity, which is particularly important for
a genebank.
The cultivation period (date of planting seeds to last harvest date) was between 106
and 159 days in Phaseolus vulgaris, depending on year and accession. Favourable
for seed production is a dry climate; wind exposure, on the other hand, is unsuitable
for bean cultivation, since, due to strong air movements, shoots are rubbed against
each other and damaged, which often is followed by infections.
Planting dates ranged between 5 May and 9 May, flowering dates between 18 June
and 29 July, and harvest dates between 19 August and 12 October. Harvest was carried
out on several occasions per accession.
Assessment of diseases (Viruses, halo blight, alfalfa mosaic virus) was done during
1993 and 1994 in all accessions. Degree of infestation was assessed as “few halo
spots” and “few viruses”.
All accessions of the genebank were botanically identified in the field and assessed
for the traits growth form, background pod colour, strings, standard pod colour, pod
form, flowering date, flower colour, date of maturity, diseases, seed size, seed form,
and seed colour. Additionally, agronomical traits were captured. These data were
registered in a FoxPro database table.
259