PH42RW

Corn

Variety Description

Variety used for comparison: 'PHWNS'

Summary: The silks of 'PH42RW' have medium intensity of anthocyanin colouration whereas the silks of 'PHWNS' have absent or very weak intensity of anthocyanin colouration. The plants of 'PH42RW' are taller than those of 'PHWNS'. The ear of 'PH42RW' is shorter than that of 'PHWNS'. The ear of 'PH42RW' has a smaller diameter than the ear of 'PHWNS'. The glumes on the cob of 'PH42RW' have medium intensity of anthocyanin colouration whereas the glumes of 'PHWNS' have absent or very weak intensity of anthocyanin colouration.

Description:

PLANT: inbred yellow variety, no plants with ear wings, small to medium 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 mid season, small angle between main axis and lateral branches, moderately dense spikelets, medium length main axis above lowest and highest lateral branch
LATERAL BRANCHES: few primary lateral branches on main axis of tassel, slightly recurved
GLUME: absent or very weak intensity of anthocyanin colouration throughout
ANTHER: medium intensity of anthocyanin colouration

EAR: mid season silk emergence, medium intensity of anthocyanin colouration of silks, conico-cylindrical shape, medium intensity of anthocyanin colouration on glumes of cob
KERNEL: intermediate type, yellow orange on top and dorsal side

Origin & Breeding History: 'PH42RW' was developed by Pioneer Hi-Bred International, Inc. from a cross between proprietary inbred lines made in 2008 in Puerto Vallarta, Mexico using a double haploid plant breeding method. In 2009, the F1 generation underwent a haploidization process. The haploids were doubled, self-pollinated and ears were selected, also in 2009. In 2010 and 2013, the subsequent D1 to D3 generations were self-pollinated and harvested in bulk. 'PH42RW' was selected in 2014 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 Willmar, Minnesota, USA and other Pioneer research locations in Canada and the USA.

Tests & Trials: The comparative trial for 'PH42RW' 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 201800284, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH42RW' with reference variety 'PHWNS'

Plant height (including tassel)(metres)

Ear length (cm)

Ear diameter (including kernels)(cm)

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Corn: 'PH42RW' (right) with reference variety 'PHWNS' (left)

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Corn: 'PH42RW'

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Corn: Reference variety 'PHWNS'