PH2TSK

Corn

Variety Description

Variety used for comparison: 'PH1MB5'

Summary: Midway through anthesis, the silks on the ear of 'PH2TSK' have a medium intensity of anthocyanin colouration while those of 'PH1MB5' have a weak intensity of anthocyanin colouration. Including the tassel, the plants of 'PH2TSK' are taller than the plants of 'PH1MB5'. The leaf blade just above the upper ear of 'PH2TSK' is narrower than that of 'PH1MB5'. The ear of 'PH2TSK' is shorter, and including the kernels, has a larger diameter than the ear of 'PH1MB5'. The primary ear of 'PH2TSK' is located higher on the stem than that of 'PH1MB5'.

Description:

PLANT: inbred yellow variety, small ratio for height of insertion of peduncle of upper ear to plant height, anthesis occurs mid-season, silk emergence occurs mid-season to late in the season
STEM: absent or very slight degree of zig-zag

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

TASSEL: medium to many primary lateral branches, medium density of spikelets on 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, very small angle with main axis, very short to short
GLUME: absent or very weak intensity of anthocyanin colouration throughout
ANTHER (ON MIDDLE THIRD OF MAIN BRANCH): absent or very weak intensity of anthocyanin colouration

EAR: medium intensity of anthocyanin colouration of silks, medium to long husk (extends one quarter to one third the length of the ear above tip), cylindrical shape, medium to many rows of grain, weak intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a high percentage of plants, medium in length
KERNEL: dent type, yellow on top and dorsal side

TILLERING: absent

Origin & Breeding History: 'PH2TSK' 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 Puerto Vallarta, Mexico. In 2009, the F1 generation was planted, self pollinated and the F2 seed harvested in bulk in Willmar, Minnesota, USA. Respectively in 2010 and 2011, the F2 population and F3 families were self pollinated with subsequent ear selection. From 2012 to 2013, the F4 to F6 lines were self pollinated with subsequent ear selection. In 2013, the F7 line was self pollinated and the F8 seed bulked as breeder seed in Willmar, Minnesota. 'PH2TSK' 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 'PH2TSK' 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 201800277, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH2TSK' with reference variety 'PH1MB5'

Plant height (including tassel) (metres)

Leaf blade width (leaf 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: 'PH2TSK' (top) with reference variety 'PH1MB5' (bottom)