Ambella

Soybean

Variety Description

Varieties used for comparison: 'Fjord', 'Jari', 'Anser' and 'Abaca'

Summary: When the cotyledons are completely unfolded, the hypocotyl of 'Ambella' has a medium intensity of anthocyanin while anthocyanin colouration is weak for 'Abaca'. When 50% of the flowers are open, the growth type of 'Ambella' is semi-determinate whereas it is indeterminate for 'Anser' and 'Abaca'. The branch attitude of 'Ambella' is erect to erect to semi-erect whereas it is semi-erect for 'Jari' and 'Abaca'. On the middle third of the main stem, the pubescence of 'Ambella' is tawny whereas it is light tawny for 'Abaca'. The degree of blistering on the leaf of 'Ambella' is medium whereas it is weak for 'Answer' and 'Abaca'. The terminal and lateral leaflets of 'Ambella' are triangular whereas they are pointed ovate for 'Jari' and 'Abaca'. The intensity of green colour of the leaf of 'Ambella' is medium whereas it is light for 'Fjord'. When 95% of the pods are ripe, the intensity of brown colour of the pod of 'Ambella' is light whereas it is medium for 'Fjord', 'Jari' and 'Abaca'. The plants of 'Ambella' are shorter than those of all reference varieties. At maturity, the seed shape of 'Ambella' is spherical whereas it is spherical flattened for 'Fjord, 'Jari. The hilum of the seed of 'Ambella' is medium brown whereas it is yellow for all reference varieties. The plants of 'Ambella' mature earlier than the plants of all reference varieties.

Description:

HYPOCOTYL: medium intensity of anthocyanin colouration

PLANT: semi-determinate growth type, erect to semi-erect to erect branch attitude, tawny pubescence on middle third of main stem, begins flowering and matures very early to early

LEAF: medium degree of blistering, medium green upper side
TERMINAL LEAFLET: triangular, small size
LATERAL LEAFLET: triangular, small size

FLOWER: violet

POD: light brown
SEED: medium size, spherical, yellow ground colour of testa
HILUM: medium brown

Origin & Breeding History: 'Ambella' originated from a cross between the varieties 'Merlin' and 'SZD-14' conducted in 2012 in Probstdorf, Austria using the pedigree method of plant breeding. From 2012 to 2015, four generations were advanced by single pod decent method, line selection and yield testing. Selection criteria included yield, seed quality traits and lodging resistance. 'Ambella' was selected in the F4 generation. Breeder seed was produced from eighteen selected F8 lines in 2019.

Tests & Trials: The comparative trials for 'Ambella' conducted in Saint-Jean-sur-Richelieu, Québec during the 2022 and 2023 growing seasons. Trials were planted in a RCB design and consisted of 3 replicates for each variety. Plots consisted of 3 rows, 5 metres in length and a row spacing of 56 cm. The trial consisted of 400 plants per variety. Measured characteristics were based on 20 measurements per variety per year. Mean differences were significant at the 5% confidence probability level based on a paired Student's t-test.

Comparison tables for 'Ambella' with reference varieties 'Fjord', 'Jari', 'Anser' and 'Abaca'

Plant height (cm)

Number of days to maturity (from planting to maturity)

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Soybean: 'Ambella' (centre) with reference varieties 'Abaca' (far left), 'Jari' (left), 'Fjord' (right) and 'Anser' (far right)

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Soybean: 'Ambella' (centre) with reference varieties 'Fjord' (top left), 'Anser' (top right), 'Abaca' (bottom right) and 'Jari' (bottom left)

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Soybean: 'Ambella' (centre) with reference varieties 'Fjord' (top left), 'Jari' (top right), 'Abaca' (bottom right) and 'Anser' (bottom left)