PH48ZZ

Corn

Variety Description

Variety used for comparison: 'PH13GH'

Summary: Including the tassel, the plants of 'PH48ZZ' are shorter than those of 'PH13GH'. The brace roots of 'PH48ZZ' have an absent or very weak intensity of anthocyanin colouration whereas those of 'PH13GH' have a weak intensity of anthocyanin colouration. The leaf blade just above the upper ear of 'PH48ZZ' is narrower than that of 'PH13GH'. The angle between the leaf blade and the stem for 'PH48ZZ' is small whereas that for 'PH13GH' is a medium size. The angle between the main axis and the lateral branches on the tassel of 'PH48ZZ' is small whereas that for 'PH13GH' is large. In the middle third of the main branch of the tassel, the anthers of 'PH48ZZ' have a medium intensity of anthocyanin colouration whereas those for 'PH13GH' have a strong intensity of anthocyanin colouration. The primary ear for 'PH48ZZ' is located lower on the stem than that of 'PH13GH'. The silks of 'PH48ZZ' have an absent or very weak intensity of anthocyanin colouration whereas the silks of 'PH13GH' have a weak intensity of anthocyanin colouration. The ear wings of 'PH48ZZ' are long whereas those of 'PH13GH' are a medium length.

Description:

PLANT: inbred yellow variety, medium ratio of height of insertion of peduncle of upper ear to plant height, anthesis occurs early in season, silk emergence occurs very early in season

STEM: absent or very slight degree of zig-zag, absent or very 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 main axis above lowest lateral branch and highest lateral branch
LATERAL BRANCHES: straight, small angle with main axis, medium length
GLUME: absent or very 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): medium intensity of anthocyanin colouration

EAR: absent or very weak intensity of anthocyanin colouration of silks, medium length husk (extends one quarter length of ear above tip), conico-cylindrical shape, medium number of rows of grain, medium intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a high percentage of plants, long
KERNEL: intermediate type, yellow on top, yellow orange on dorsal side

TILLERING: present on a low percentage of plants

Origin & Breeding History: 'PH48ZZ' was developed by Pioneer Hi-Bred International, Inc. using a double haploid plant breeding method. In 2009, a cross was conducted between proprietary inbred lines in Moorhead, Minnesota, USA. In 2011, the F1 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, D2 and D3 lines were self pollinated with subsequent ear selections, respectively. 'PH48ZZ' 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 St. Polycarpe, Quebec, Canada in 2015.

Tests & Trials: The comparative trial for 'PH48ZZ' 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 26 measurements per variety. Mean differences were significant at the 5% probability level based on Student's T-tests. Results were supported by the official technical examination report 202000349, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH48ZZ' with reference variety 'PH13GH'

Plant height (metres)

Leaf blade width (cm)

Primary ear height (metres)

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Corn: 'PH48ZZ' (left) with reference variety 'PH13GH' (right)

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Corn: 'PH48ZZ' (top) with reference variety 'PH13GH' (bottom)