1PJBB89

Corn

Variety Description

Variety used for comparison: 'PH2G60'

Summary: The leaf blade of ‘1PJBB89' is narrower than that of ‘PH2G60'. The silks of ‘1PJBB89' have a medium intensity of anthocyanin colouration whereas those of ‘PH2G60' have a strong intensity of anthocyanin colouration. ‘1PJBB89' has no ear wings present whereas ‘PH2G60' has a medium percentage of plants with ear wings present. Including the kernels, the ear of ‘1PJBB89' has a smaller diameter than that of ‘PH2G60'. The ear of ‘1PJBB89' has a conical shape whereas that of ‘PH2G60' has a cylindrical shape.

Description:

PLANT: inbred yellow variety, medium 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): intermediate degree of undulation of margin, medium angle with stem, slightly recurved

TASSEL: absent or very few primary lateral branches, moderately sparse spikelets on middle third of main branch, medium length of main axis above lowest lateral branch, long main axis above highest lateral branch
LATERAL BRANCHES: slightly recurved, very 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): weak intensity of anthocyanin colouration

EAR: medium intensity of anthocyanin colouration of silks, short husk (level with tip), conical shape, very many rows of grain, strong intensity of anthocyanin colouration on glumes of cob
KERNEL: flint-like type, yellow on top, orange on dorsal side

TILLERING: absent

Origin & Breeding History: ‘1PJBB89' 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 ‘PH1MBR' and ‘PH2G60', conducted in Woodstock, Ontario in 2012. 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 2013. Resulting DH1 lines were self pollinated and harvested in bulk. ‘1PJBB89' was selected 2013 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 2013.

Tests & Trials: The comparative trial for ‘1PJBB89' 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 202300215, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for '1PJBB89' with reference variety 'PH2G60'

Leaf blade width (cm)

Ear diameter (including kernels) (cm)

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Corn: '1PJBB89'

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Corn: Reference variety 'PH2G60'

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Corn: '1PJBB89' (top) with reference variety 'PH2G60' (bottom)