PH48JH

Corn

Variety Description

Variety used for comparison: 'PH18G5'

Summary: Anthesis for the plants of 'PH48JH' occurs mid season whereas that for 'PH18G5' occurs late in the season. Silk emergence for the plants of 'PH48JH' occurs early in the season whereas that for 'PH18G5' occurs mid season. Including the tassel, the plants of 'PH48JH' are shorter than those of 'PH18G5'. The leaf blade just above the upper ear of 'PH48JH' is wider than that of 'PH18G5'. The angle between the main axis and the lateral branches of the tassel of 'PH48JH' is small whereas that of 'PH18G5' is a medium size. The ear of 'PH48JH' is longer, and including the kernels, has a smaller diameter than that of 'PH18G5'. The plants of 'PH48JH' have a low percentage of tillering whereas for the plants of 'PH18G5' tillering is absent.

Description:

PLANT: inbred yellow variety, small ratio of height of insertion of peduncle of upper ear to plant height, anthesis occurs mid season, silk emergence occurs early in season

STEM: absent or very slight degree of zig-zag, strong intensity of anthocyanin colouration on brace roots

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

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

EAR: weak intensity of anthocyanin colouration of silks, medium length husk (extends one quarter length of ear above tip), conico-cylindrical shape, medium number of rows of grain, absent or very weak intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a low percentage of plants, medium length
KERNEL: intermediate type, yellow on top, orange on dorsal side

TILLERING: present on a low percentage of plants

Origin & Breeding History: 'PH48JH' was developed by Pioneer Hi-Bred International, Inc. using a double haploid plant breeding method. In 2009, a cross was conducted between proprietary inbred lines in Puerto Vallarta, Mexico. In 2010, the F1 generation underwent a haploidization process with subsequent chromosome doubling and selfing. In 2011, selected D1 lines were self pollinated and harvested in bulk. In 2012 and 2014, the D2 and D3 lines were self pollinated with subsequent ear selections, respectively. 'PH48JH' 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. The D5 seed was bulked as breeder seed in Marion, Iowa, USA in 2015.

Tests & Trials: The comparative trial for 'PH48JH' was conducted in Coteau-du-Lac, Quebec during the 2021 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 of 50 to 60 plants per variety. Measured characteristics were based on a minimum of 29 measurements per variety. Mean differences were significant at the 5% probability level based on Student's T-tests. Results were supported by the official technical examination report 202000342, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH48JH' with reference variety 'PH18G5'

Plant height (metres)

Leaf blade width (cm)

Ear length (cm)

Ear diameter (including kernels) (cm)

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Corn: 'PH48JH' (left) with reference variety 'PH18G5' (right)

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Corn: 'PH48JH' (top) with reference variety 'PH18G5' (bottom)