PH1W6W

Corn

Variety Description

Variety used for comparison: 'PHHEN'

Summary: The angle between the main axis and lateral branches on the tassel of 'PH1W6W' is small to medium while the angle is very small for 'PHHEN'. Including the tassel, the plants of 'PH1W6W' are shorter than the plants of 'PHHEN'. The leaf blade just above the upper ear of 'PH1W6W' is wider than that of 'PHHEN'. The ears of 'PH1W6W' are shorter, and including the kernels, have a larger diameter than those of 'PHHEN'. The primary ear of 'PH1W6W' is located lower on the stem than that of 'PHHEN'.

Description:

PLANT: inbred yellow variety, small to medium ratio for height of insertion of peduncle of upper ear to plant height, anthesis and silk emergence occur early in the season
STEM: absent or very slight degree of zig-zag, medium to strong intensity of anthocyanin colouration on brace roots

LEAF BLADE (JUST ABOVE UPPER EAR): intermediate degree of undulation of margin, small angle with stem, straight to slightly recurved

TASSEL: many primary lateral branches, medium to moderately dense spikelets in middle third of main branch, main axis above lowest lateral branch short to medium in length, main axis above highest lateral branch very short
LATERAL BRANCHES (SECOND BRANCH FROM BOTTOM OF TASSEL): straight, small to medium angle with main axis, very short to short
GLUME: absent or very weak intensity of anthocyanin colouration at base, weak to medium intensity of anthocyanin colouration at middle and apex
ANTHER (ON MIDDLE THIRD OF MAIN BRANCH): medium intensity of anthocyanin colouration

EAR: absent or very weak intensity of anthocyanin colouration of silks, very short to short husk (below level of tip), conico-cylindrical shape, medium to many rows of grain, strong intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a medium to high percentage of plants, long
KERNEL: dent type, yellow on top and dorsal side

TILLERING: present on a very low to low percentage of plants

Origin & Breeding History: 'PH1W6W' was developed by Pioneer Hi-Bred International, Inc. using the pedigree method of plant breeding. In 2006, the initial cross was conducted between proprietary inbred lines in Salinas, Puerto Rico. In 2007, the F1 generation was planted, self pollinated and harvested in bulk in Willmar, Minnesota, USA. Respectively, in 2007 and 2008, the F2 population and F3 families were self pollinated with subsequent ear selection in Moorhead, Minnesota. From 2009 to 2012, the F4 to F10 lines were self pollinated with subsequent ear selection. In 2012, the F11 line was self pollinated and the F12 seed bulked as breeder seed in Moorhead, Minnesota, USA. 'PH1W6W' was selected based on tassel size, pollen production, germination ability, stalk lodging resistance, late season plant health, yield in hybrid combination, grain quality, as well as disease and insect resistance.

Tests & Trials: The comparative trial for 'PH1W6W' was conducted in Coteau-du-lac, Quebec during the 2019 growing season. The trial was planted in a RCB Design with 3 replicates. Each replicate consisted of one row of approximately 20 plants, 3 metres in length with 76 cm between the rows. There was a total of 50 to 60 plants per variety. Measured characteristics were based on 30 measurements per variety. Mean differences were significant at the 5% probability level based on paired Student's T-tests. Results were supported by the official technical examination report 201500232, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH1W6W' with reference variety 'PHHEN'

Plant height (including tassel) (metres)

Leaf blade width (just above upper ear) (cm)

Ear length (cm)

Ear diameter (in middle including kernels) (cm)

Primary ear, height from ground (metres)

Click on image for larger view

Corn: 'PH1W6W' (top) with reference variety 'PHHEN' (bottom)