PH486R

Corn

Variety Description

Variety used for comparison: 'PH18FC'

Summary: The leaf blade of ‘PH486R' is wider than that of ‘PH18FC'. The spikelets on the tassel of ‘PH486R' are moderately dense whereas those of ‘PH18FC' are a medium density. Including the kernels, the ear of ‘PH486R' has a larger diameter than that of ‘PH18FC'. The kernels of ‘PH486R' are dent-like type whereas those of ‘PH18FC' are flint-like type. ‘PH486R' has a low percentage of plants with tillering whereas ‘PH18FC' has no tillering present.

Description:

PLANT: inbred yellow variety, medium ratio of height of insertion of peduncle of upper ear to plant height, anthesis and silk emergence occurs very late in 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, small angle with stem, straight

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

EAR: weak intensity of anthocyanin colouration of silks, conico-cylindrical shape, very many rows of grain, absent or very weak intensity of anthocyanin colouration on glumes of cob
KERNEL: dent-like type, yellow on top, yellow orange on dorsal side

TILLERING: present on a low percentage of plants

Origin & Breeding History: ‘PH486R' was developed by Pioneer Hi-Bred International, Inc. using a double haploid plant breeding method. The variety resulted from a cross between two inbred lines, designated ‘PH18FC' and ‘PH1M1K', conducted in Puerto Vallarta, Mexico in 2009. The F2 generation underwent a haploidization process with subsequent chromosome doubling and selfing. Resulting DH1 lines were self pollinated and harvested in bulk. From 2009 to 2014, the DH2 to DH5 lines were self pollinated with subsequent ear selections, respectively. ‘PH486R' was selected in 2014 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. Breeder seed was established at the DH4 in 2016.

Tests & Trials: The comparative trial for 'PH486R' was conducted in Coteau-du-Lac, Quebec during the 2022 growing season. The trial was planted in a RCB design with 3 replicates. Each replicate consisted of one 3 metre long row with 76 cm between the rows. With approximately 20 plants per row, there was a total 60 plants per variety. Measured characteristics were based on a minimum of 30 measurements per variety. Mean differences were significant at the 5% confidence probability level based on a paired Student's T-tests. Results were supported by the official technical examination report number 202100324, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH486R' with reference variety 'PH18FC'

Leaf blade width (cm)

Ear diameter (including kernels) (cm)

Click on image for larger view

Corn: 'PH486R' (top) with reference variety 'PH18FC' (bottom)