1PSKB72

Corn

Variety Description

Variety used for comparison: 'PH25KM'

Summary: The brace roots of ‘1PSKB72' have a medium intensity of anthocyanin colouration whereas those of ‘PH25KM' have an absent or very weak intensity of anthocyanin colouration. The stem of ‘1PSKB72' has a medium degree of zig-zag whereas that of ‘PH25KM' has an absent or very slight degree of zig-zag. The angle between the leaf blade and the stem of ‘1PSKB72' is small whereas that for ‘PH25KM' is very small. The leaf blade of ‘1PSKB72' is slightly recurved whereas that of ‘PH25KM' is straight. The tassel of ‘1PSKB72' has few primary lateral branches whereas that of ‘PH25KM' has absent or very few primary lateral branches. Excluding the base, the glume on the tassel of ‘1PSKB72' has a weak intensity of anthocyanin colouration whereas that of ‘PH25KM' has an absent or very weak intensity of anthocyanin colouration. The anthers on the tassel of ‘1PSKB72' have a weak intensity of anthocyanin colouration whereas those of ‘PH25KM' have an absent or very weak intensity of anthocyanin colouration. The silks on the ear of ‘1PSKB72' have a weak intensity of anthocyanin colouration whereas those of ‘PH25KM' have an absent or very weak intensity of anthocyanin colouration. The ear of ‘1PSKB72' is longer than that of ‘PH25KM'. The glumes of the cob of ‘1PSKB72' have a strong intensity of anthocyanin colouration whereas those of ‘PH25KM' have a medium intensity of anthocyanin colouration.

Description:

PLANT: inbred yellow variety, small 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: medium degree of zig-zag, medium intensity of anthocyanin colouration on brace roots

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

TASSEL: few primary lateral branches, moderately sparse spikelets on middle third of main branch, long main axis above lowest lateral branch, very long main axis above highest lateral branch
LATERAL BRANCHES: slightly recurved, small angle with main axis, short
GLUME: absent or very weak intensity of anthocyanin colouration at base, weak intensity of anthocyanin colouration excluding the base
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, few rows of grain, strong intensity of anthocyanin colouration on glumes of cob
KERNEL: intermediate type, yellow on top, yellow orange on dorsal side

Origin & Breeding History: ‘1PSKB72' was developed by Pioneer Hi-Bred International, Inc. using a double haploid plant breeding method. The variety resulted from a cross between two proprietary inbred lines, conducted in Willmar, Minnesota, USA in 2014. The F1 generation underwent haploidization, followed by chromosome doubling. Resulting DH1 lines were self pollinated and harvested in bulk for advancement and observations in Puerto Vallarta, Mexico; Willmar, Minnesota, USA; Olivia, Minnesota, USA and Arica, Chile. ‘1PSKB72' was selected in 2018 in Willmar, Minnesota, USA 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 F1DH in 2018.

Tests & Trials: The comparative trial for ‘1PSKB72' was conducted in Coteau-du-Lac, Quebec during the 2024 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 202400349, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison table for '1PSKB72' with reference variety 'PH25KM'

Ear length (cm)

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Corn: '1PSKB72'

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Corn: '1PSKB72'

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Corn: Reference variety 'PH25KM'