AAC Asher
| Denomination: | 'AAC Asher' |
|---|---|
| Botanical Name: | Pisum sativum |
| Applicant/Holder: |
Agriculture & Agri-Food Canada, Lacombe Lacombe Research Station 6000 C and E trail Lacombe, Alberta T4L 1W1 Canada |
| Breeder: |
Deng-jin Bing, Agriculture & Agri-Food Canada, Lacombe, Alberta |
| Agent in Canada: |
Agriculture & Agri-Food Canada Office of Intellectual Property and Commercialization c/o Shannon Whyte 107 Science Place Saskatoon, Saskatchewan S7N 0X2 Canada Tel: (204) 999-9887 |
| Application Date: | 2017-12-27 |
| Provisional Protection:: | 2017-12-27 |
| Application Number: | 17-9360 |
| Grant of Rights Date: | 2019-12-05 |
| Certificate Number: | 6094 |
| Grant of Rights Termination Date: | 2039-12-05 |
Variety Description
Varieties used for comparison: 'AAC Lacombe' and 'Agassiz'
Summary: The fully mature plants of 'AAC Asher' have many nodes per stem while the plants of 'AAC Lacombe' have very many nodes per stem. The stipule for 'AAC Asher' is longer than that of 'AAC Lacombe'. The plants of 'AAC Asher' flower earlier than those of 'AAC Lacombe'. The peduncle of 'AAC Asher' is shorter than the peduncle of 'Agassiz'. The pod of 'AAC Asher' has less ovules than the pod of 'AAC Lacombe'. At maturity, the stem of 'AAC Asher' is shorter than that of 'AAC Lacombe'. The 100 seed weight is greater for 'AAC Asher' than for 'Agassiz'.
Description:
PLANT: field type, semi-leafless, no anthocyanin colouration, green, flowers mid-season
STEM: no anthocyanin colouration of axil, no fasciation, many nodes (up to and including first fertile node)
LEAFLETS: absent
STIPULE: absent or very sparse density of flecking
FLOWER: maximum of two per node
STANDARD: white, level to moderately arched base
POD: entire parchment, blunt distal part, absent or very weak to weak curvature, green
IMMATURE SEED: medium green
SEED: matures mid to late in season, simple starch grains, yellow cotyledons
HILUM: same colour as testa
DISEASE REACTION: resistant to powdery mildew (Erysiphe pisi Syd.)
Origin & Breeding History: 'AAC Asher' (experimental designation P0521-109) originated from the cross DC715S-4 / P9904601 conducted in 2005 at the Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, Lacombe, Alberta. The breeding method was pedigree selection in combination with single seed descent. Major selection criteria was based on yield, maturity and resistance to lodging. Breeder seed for 'AAC Asher' was derived from a single F10 line. P0521-109 was further evaluated in the 2014 and 2015 Western Canada Field Pea Cooperative Registration Trials.
Tests & Trials: The comparative tests and trials for 'AAC Asher' were conducted at the Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, Lacombe, Alberta, during the 2017 and 2018 growing seasons. The trials were established using a complete randomized block design consisting of 4 replications per variety. Each replicate consisted of 4 rows spaced 25 cm apart, with a row length of 5 metres and a planting density of 85 viable seeds per square metre. The measured characteristics were based on 20 measurements per variety per year except 100 seed weight where 4 measurements were taken per variety per year. The mean differences were significant at the 5% confidence probability level based on a paired Student's t-test.
Comparison tables for 'AAC Asher' with reference varieties 'AAC Lacombe' and 'Agassiz'
Number of nodes per stem (up to and including first fertile node)
| 'AAC Asher' | 'AAC Lacombe' | 'Agassiz' | |
|---|---|---|---|
| mean 2017 | 15.2 | 19.1 | 15.7 |
| std. deviation 2017 | 1.7 | 1.6 | 1.9 |
| mean 2018 | 17.9 | 19.7 | 18.2 |
| std. deviation 2018 | 1.3 | 2.3 | 1.9 |
Stipule length (mm)
| 'AAC Asher' | 'AAC Lacombe' | 'Agassiz' | |
|---|---|---|---|
| mean 2017 | 71.0 | 62.1 | 73.2 |
| std. deviation 2017 | 7.8 | 9.3 | 8.2 |
| mean 2018 | 68.0 | 63.4 | 71.6 |
| std. deviation 2018 | 4.8 | 7.3 | 8.4 |
Time of flowering (when 30% of plants have at least one flower open) (days from planting)
| 'AAC Asher' | 'AAC Lacombe' | 'Agassiz' | |
|---|---|---|---|
| mean 2017 | 55.0 | 58.3 | 55.0 |
| mean 2018 | 51.0 | 53.5 | 50.8 |
Peduncle length (from stem to first pod) (cm)
| 'AAC Asher' | 'AAC Lacombe' | 'Agassiz' | |
|---|---|---|---|
| mean 2017 | 7.3 | 6.5 | 8.7 |
| std. deviation 2017 | 1.6 | 1.6 | 1.7 |
| mean 2018 | 6.4 | 5.5 | 7.7 |
| std. deviation 2018 | 1.8 | 1.3 | 2.0 |
Number of ovules per pod (at 2nd fertile node, before seed development)
| 'AAC Asher' | 'AAC Lacombe' | 'Agassiz' | |
|---|---|---|---|
| mean 2017 | 7.5 | 8.8 | 7.4 |
| std. deviation 2017 | 0.7 | 0.5 | 0.7 |
| mean 2018 | 7.7 | 8.4 | 7.4 |
| std. deviation 2018 | 0.7 | 0.6 | 0.7 |
Stem length (at maturity) (cm)
| 'AAC Asher' | 'AAC Lacombe' | 'Agassiz' | |
|---|---|---|---|
| mean 2017 | 90.1 | 106.8 | 103.5 |
| std. deviation 2017 | 9.9 | 8.7 | 6.6 |
| mean 2018 | 87.8 | 99.5 | 90.4 |
| std. deviation 2018 | 7.2 | 7.0 | 8.9 |
Seed weight (grams per 100 seeds)
| 'AAC Asher' | 'AAC Lacombe' | 'Agassiz' | |
|---|---|---|---|
| mean 2017 | 258 | 264 | 239 |
| std. deviation 2017 | 3.2 | 5.2 | 5.0 |
| mean 2018 | 284 | 290 | 242 |
| std. deviation 2018 | 1.9 | 3.8 | 6.7 |
Click on image for larger view
Pea: 'AAC Asher' (left) with reference varieties 'AAC Lacombe' (centre left) and 'Agassiz' (centre right)
Click on image for larger view
Pea: 'AAC Asher' (left) with reference varieties 'AAC Lacombe' (centre left) and 'Agassiz' (centre right)
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