1PYRA69

Corn

Variety Description

Variety used for comparison: 'PH1TRA'

Summary: Including the tassel, the plants of ‘1PYRA69' are shorter than those of ‘PH1TRA'. The leaf blade of ‘1PYRA69' is wider than that of ‘PH1TRA'. The ear of ‘1PYRA69' is shorter than that of ‘PH1TRA'.

Description:

PLANT: inbred yellow variety, very large ratio of height of insertion of peduncle of upper ear to plant height, anthesis occurs very late in season, silk emergence occurs 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 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: slightly recurved, medium angle with main axis, medium length
GLUME: 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): absent or very 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, very many rows of grain, weak intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a high percentage of plants
KERNEL: flint-like type, yellow on top, yellow on dorsal side

TILLERING: absent

Origin & Breeding History: ‘1PYRA69' originated from a cross conducted in 2014 by Pioneer Hi-Bred International, Inc. in Salinas, Puerto Rico, between the proprietary inbred lines ‘PH1TRA' and ‘PH1K3N'. The resulting F1 plants were self-pollinated, and ear selections were made based on genetic analysis predicting disease and insect resistance, as well as agronomic performance. The F2 generation was backcrossed, followed by selfing and ear-to-row pedigree selections from the BC1F1 through the BC1F4 generations. ‘1PYRA69' was identified at the BC1F5 generation in 2017 based on its tassel size, pollen production, germination ability, stalk lodging resistance, late-season plant health, performance in hybrid combinations, grain quality, and resistance to diseases and insects. Breeder seed was established at the BC1F6 generation in 2017.

Tests & Trials: The comparative trial for ‘1PYRA69' 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 202200400, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for '1PYRA69' with reference variety 'PH1TRA'

Plant height (including tassel) (cm)

Leaf blade width (cm)

Ear length (cm)

Click on image for larger view

Corn: '1PYRA69' (top) with reference variety 'PH1TRA' (bottom)