1PYWK36

Corn

Variety Description

Variety used for comparison: 'PH2DYM'

Summary: Including the tassel, the plants of ‘1PYWK36' are taller than those of ‘PH2DYM'. The apex and middle of the glumes of the tassel of ‘1PYWK36' have an absent or very weak intensity of anthocyanin colouration whereas those of ‘PH2DYM' have a strong intensity of anthocyanin colouration. The silks of ‘1PYWK36' have a weak intensity of anthocyanin colouration whereas those of ‘PH2DYM' have a strong 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 very late in season, silk emergence occurs very late in season

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

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

TASSEL: medium number of primary lateral branches, medium density of spikelets on middle third of main branch, medium length of main axis above lowest lateral branch, short main axis above highest lateral branch
LATERAL BRANCHES: straight, very small angle with main axis, medium length
GLUME: 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): absent or very weak intensity of anthocyanin colouration

EAR: weak intensity of anthocyanin colouration of silks, short husk (level with tip), conico-cylindrical shape, very many rows of grain, absent or very weak intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a low percentage of plants
KERNEL: intermediate type, yellowish white on top, yellow on dorsal side

TILLERING: present on a very low percentage of plants

Origin & Breeding History: ‘1PYWK36' 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 ‘PH24VK' and ‘PH2DYM', conducted in Puerto Vallarta, Mexico in 2013. The F1 generation underwent haploidization, followed by chromosome doubling and selfing, as part of a field experiment conducted in Arica, Chile, which was planted in November 2014. Resulting DH1 lines were self pollinated and harvested in bulk. ‘1PYWK36' was selected 2015 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 DH2 in 2015

Tests & Trials: The comparative trial for ‘1PYWK36' was conducted in Coteau-du-Lac, Quebec during the 2023 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 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 202200402, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison table for '1PYWK36' with reference variety 'PH2DYM'

Plant height (including tassel) (metres)

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Corn: '1PYWK36'

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Corn: Reference variety 'PH2DYM'

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Corn: '1PYWK36' (top) with reference variety 'PH2DYM' (bottom)