PH47KB

Corn

Variety Description

Variety used for comparison: 'PH18G5'

Summary: Silk emergence for the plants of 'PH47KB' occurs mid season whereas that for 'PH18G5' occurs late in the season. Including the tassel, the plants of 'PH47KB' are taller than those of 'PH18G5'. The leaf bladejust above the upper ear of 'PH47KB' has strong undulation of the margin whereas that of 'PH18G5' has a medium degree of undulation of the margin. The angle between the leaf blade and the stem for 'PH47KB' is very small whereas that for 'PH18G5' is small. The tassels of 'PH47KB' have moderately sparse spikelets whereas those of 'PH18G5' have a medium density of spikelets. The apex and middle of the glumes on the tassel of 'PH47KB' have a strong intensity of anthocyanin colouration whereas those of 'PH18G5' have a medium intensity of anthocyanin colouration.

Description:

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

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

EAR: absent or very weak intensity of anthocyanin colouration of silks, long husk (extends one third 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 medium percentage of plants, medium length
KERNEL: dent-like type, yellow on top, yellow orange on dorsal side

TILLERING: none

Origin & Breeding History: 'PH47KB' was developed by Pioneer Hi-Bred International, Inc. using a double haploid plant breeding method. In 2010, a cross was conducted between proprietary inbred lines in Salinas, Puerto Rico. In 2011, the resulting F1 was selfed and bulk harvested. The F2 generation underwent a haploidization process with subsequent chromosome doubling and selfing. In 2012, selected D1 lines were self pollinated and harvested in bulk. In 2014, the D2 and D3 lines were self pollinated with subsequent ear selections, respectively. 'PH47KB' 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 New Holland, Pennsylvania, USA in 2015.

Tests & Trials: The comparative trial for 'PH47KB' 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 30 measurements per variety. 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 202000329, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison table for 'PH47KB' with reference variety 'PH18G5'

Plant height (metres)

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Corn: 'PH47KB' (left) with reference variety 'PH18G5' (right)

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Corn: 'PH47KB' (top) with reference variety 'PH18G5' (bottom)