PH2FDW

Corn

Variety Description

Variety used for comparison: 'PH1DBM'

Summary: During anthesis, the angle between the main axis and the second lateral branch from the bottom of the tassel of 'PH2FDW' is large while the angle is small for 'PH1DBM'. From the beginning of anthesis to just before milk development, the brace roots of 'PH2FDW' have a very strong intensity of anthocyanin colouration while those of 'PH1DBM' have an absent or very weak to weak intensity of anthocyanin colouration. Including the tassel, the plants of 'PH2FDW' are shorter than the plants of 'PH1DBM'. Including the kernels, the ear of 'PH2FDW' has a smaller diameter than the ear of 'PH1DBM'. The kernel of 'PH2FDW' is dent-like type while the kernel of 'PH1DBM' is flint-like type. The primary ear of 'PH2FDW' is located lower on the stem than that of 'PH1DBM'.

Description:

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

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

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

EAR: absent or very weak intensity of anthocyanin colouration of silks, short to medium husk (level with to extending one quarter the length of the ear above tip), cylindrical shape, very few to few rows of grain, strong intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a high percentage of plants, medium to long
KERNEL: dent-like type, yellow on top and dorsal side

TILLERING: present on a low to medium percentage of plants

Origin & Breeding History: 'PH2FDW' was developed by Pioneer Hi-Bred International, Inc. using the pedigree method of plant breeding. The initial cross was conducted between proprietary inbred lines in 2008, in Ithaca, Michigan, USA. The F1 generation was planted, self pollinated and the F2 seed bulked in Puerto Vallarta, Mexico. Respectively, in 2009 and 2010, the F2 population and F3 families were self pollinated with subsequent F3 ear selection in Moorhead, Minnesota. From 2011 to 2014, the F4 to F8 lines were self pollinated with subsequent ear selections. In 2014, the F9 line was self pollinated and the F10 seed bulked as breeder seed in Buin, Chile. 'PH2FDW' 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 'PH2FDW' 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 a minimum of 29 measurements per variety. Mean differences were significant at the 5% probability level based on Student's T-tests. Results were supported by the official technical examination report 201700151, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH2FDW' with reference variety 'PH1DBM'

Plant height (including tassel) (metres)

Ear diameter (in middle including kernels) (cm)

Primary ear, height from ground (metres)

Click on image for larger view

Corn: 'PH2FDW' (top) with reference variety 'PH1DBM' (bottom)