PH2T7V

Corn

Variety Description

Variety used for comparison: 'PHW2Z'

Summary: The silks of 'PH2T7V' have weak intensity of anthocyanin colouration whereas the silks of 'PHW2Z' have strong intensity of anthocyanin colouration. The ear of 'PH2T7V' is shorter than that of 'PHW2Z'. The ear of 'PH2T7V' has a larger diameter than the ear of 'PHW2Z'. The primary ear on the stem of 'PH2T7V' is located higher on the stem than it is for 'PHW2Z'.

Description:

PLANT: inbred yellow variety, none with ear wings, very small to small ratio of height of insertion of peduncle of upper ear to plant height
STEM: weak intensity of anthocyanin colouration on brace roots

TASSEL: anthesis occurs late, small angle between main axis and lateral branches, moderately dense spikelets, long main axis above lowest lateral branch, medium to long main axis above highest lateral branch
LATERAL BRANCHES: many primary lateral branches on main axis of tassel, slightly recurved
GLUME: absent or very weak intensity of anthocyanin colouration at base, strong intensity of anthocyanin colouration at apex and middle
ANTHER: absent or very weak intensity of anthocyanin colouration

EAR: late silk emergence, weak intensity of anthocyanin colouration of silks, long husk (extends one third the length of ear above tip), cylindrical shape, medium intensity of anthocyanin colouration on glumes of cob
KERNEL: dent type, yellow on top and dorsal side

Origin & Breeding History: 'PH2T7V' was developed by Pioneer Hi-Bred International, Inc. from a cross between proprietary inbred lines made in 2007 in Marion, Iowa, USA using a double haploid plant breeding method. In 2008, the F1 generation was crossed to another proprietary inbred line to create a three way hybrid. The haploid was doubled, self-pollinated and ears were selected in 2009. From 2009 to 2012, the subsequent D1 to D3 generations were self-pollinated and harvested in bulk. 'PH2T7V' was selected in 2013 based on yield per se, yield in hybrid combination, tassel size, pollen production, stalk lodging resistance, late season plant health, grain quality, as well as disease and insect resistance. Yield trials were grown in Janesville, Wisconsin, USA and other Pioneer research locations in Canada and the USA.

Tests & Trials: The comparative trial for 'PH2T7V' was conducted in Woodstock, Ontario during the 2018 growing season. The trial was planted in a complete randomized design with 3 replicates. Plots consisted of one row 3 metres in length and a row spacing of 76 cm. Each plot contained approximately 20 plants resulting in a total of 50 to 60 plants per variety. Measured characteristics were based on a minimum of 30 measurements. 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 201800251, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH2T7V' with reference variety 'PHW2Z'

Ear length (cm)

Ear diameter (including kernels)(cm)

Primary ear, height from ground (metres)

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Corn: 'PH2T7V' (left) with reference variety 'PHW2Z' (right)

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Corn: 'PH2T7V'

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Corn: Reference variety 'PHW2Z'