PH2G4Y

Corn

Variety Description

Variety used for comparison: 'PHWHE'

Summary: The tassel of 'PH2G4Y' has none or very few to few lateral branches whereas the tassel of 'PHWHE' has a medium number of lateral branches. At the end of anthesis, the main axis above the highest lateral branch is very long on the tassel of 'PH2G4Y' whereas it is short on the tassel of 'PHWHE'. When including the kernels, the diameter at the middle of the ear of 'PH2G4Y' is smaller than that of 'PHWHE'.

Description:

PLANT: inbred yellow corn variety, low frequency of plants with ear wings

TASSEL: anthesis occurs very early to early in season, very small to small angle between main axis and lateral branches during anthesis, moderately dense spikelets, long main axis above lowest lateral branch, very long main axis above highest lateral branch
LATERAL BRANCHES: absent or very few to few on main axis of tassel, slightly recurved
GLUME: absent or very weak intensity of anthocyanin colouration at base, weak intensity of anthocyanin colouration at tip and on body
ANTHER: weak intensity of anthocyanin colouration

EAR: very early silk emergence, absent or very weak intensity of anthocyanin colouration of silks, conico-cylindrical shape, very short ear wings, weak to medium intensity of anthocyanin colouration of cob glumes
KERNEL: dent-like type, yellow on top, yellow orange on dorsal side

Origin & Breeding History: 'PH2G4Y' was developed by Pioneer Hi-Bred International, Inc. from the cross between proprietary inbred lines made in 2007 in Moorhead, Minnesota, USA using a double haploid plant breeding method. In 2007, the F1 generation was planted, self-pollinated and harvested in bulk in Puerto Vallarta, Mexico. The F2 generation underwent a haploidization process near Woodstock, Ontario, Canada in 2008. The haploids were doubled, self-pollinated and ears were harvested near Buin, Chile in 2008. From 2009 to 2011, the subsequent D1 to D3 generations were self-pollinated and harvested in bulk. Selection criteria used in the advancement process included 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 Woodstock, Ontario and wide area testing was done in Canada and the USA from 2009 to 2011.

Tests & Trials: The comparative trial for 'PH2G4Y', conducted in Woodstock, Ontario during the 2017 growing season, was planted in a complete randomized design and consisted of 3 replicates. Plots consisted of one row 3 metres in length with a row spacing of 76 cm. Each plot had approximately 20 plants per replicate for a total of 50 to 60 plants per variety. Measured characteristics were based on a minimum of 29 measurements. Mean differences were significant at the 5% probability level based on unpaired Student's T-tests. Results were supported by the official technical examination report 201700157, purchased from the Plant Variety Protection Office, Beltsville, Maryland, USA.

Comparison table for 'PH2G4Y' with reference variety 'PHWHE'

Ear diameter (in middle including kernels) (cm)

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Corn: 'PH2G4Y' (top) with reference variety 'PHWHE' (bottom)