Koma

Buckwheat

Denomination: 'Koma'
Previously Proposed Denomination: 'BX98-0084-14-1-0-0-0-0'
Botanical Name: Fagopyrum esculentum
Applicant/Holder: Kade Research Ltd.
126 Southpark Street
Morden, Manitoba
R6M 1H1
Canada
Breeder: C. Campbell, Kade Research Ltd., Morden, Manitoba
Application Date: 2004-06-14
Application Number: 04-4220
Date abandoned: 2008-11-06

Variety Description

Varieties used for comparison: 'Koto' and 'Koban'

Summary: The majority of flowers of 'Koma' are homomorphic while they are mainly heteromorphic in the reference varieties. 'Koma' flowers slightly earlier than 'Koto'. The seed of 'Koma' is slightly shorter than that of 'Koto' and slightly narrower than that of 'Koban'. The seed of 'Koma' is black while it is black and brown in 'Koban'. 'Koma' has a higher seed density than the reference varieties. 'Koma' matures slightly sooner than 'Koban'.

Description:

PLANT: diploid, open and self pollinated

LEAF: arrow shaped

FLOWER BUD: absent or very weak intensity of anthocyanin colouration
INFLORESCENCE: semi compact terminal umbels and single axillary racemes
FLOWER: mainly homomorphic

SEED: black, rounded to well filled, wings absent

Origin & Breeding History: 'Koma' originated from the cross made in 1998, under greenhouse conditions, of BM94199 X Fagopyrum homotropicum accession K950818-3 at the Crop Diversification Centre, Agriculture & Agri-Food Canada, Morden, Manitoba. The resultant progeny was backcrossed 5 times to F. esculentum line BM94199 and one time to F. esculentum line BM94364. A single plant, designated BX98-0084-14-1-0-0 was derived from the F4 progeny. Selection criteria included uniform and high seed yield and superior flour functionality characteristics.

Tests & Trials: Tests and trials were conducted during the summers of 2004 and 2005 in Morden, Manitoba. Plots consisted of 6 rows, with a row spacing of 17 cm and a row length of 5 metres. There were more than 500 plants per plot. There were 4 replications arranged in an randomized complete block design.


Comparison tables for 'Koma' with reference varieties 'Koto' and 'Koban'

Days to flowering

  'Koma' 'Koto' 'Koban'
mean 2004 45 46 43
mean 2005 45 47 46

Seed length (mm)

  'Koma' 'Koto' 'Koban'
mean 2004 4.89 5.61 5.42
std. deviation 0.65 0.42 0.33
mean 2005 5.54 5.62 6.16
std. deviation 0.53 0.49 0.63

Seed width (mm)

  'Koma' 'Koto' 'Koban'
mean 2004 3.77 4.77 3.98
std. deviation 0.36 0.31 0.45
mean 2005 4.19 4.37 4.36
std. deviation 0.29 0.22 0.22

Seed density (kg/m3)

  'Koma' 'Koto' 'Koban'
mean 2004 677.48 650.32 640.28
mean 2005 690.60 602.61 681.80

Click on image for larger view
Koma
Buckwheat: 'Koma' (right) with reference varieties 'Koban' (left) and 'Koto' (centre)

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