1PAEZ42

Corn

Variety Description

Variety used for comparison: 'PH2TRS'

Summary: The tassel of ‘1PAEZ42' has a medium number of primary lateral branches whereas that of ‘PH2TRS' has few primary lateral branches. The apex, middle and base of the glume on the tassel of ‘1PAEZ42' has a weak intensity of anthocyanin colouration whereas that of ‘PH2TRS' has an absent or very weak intensity of anthocyanin colouration. The ear of ‘1PAEZ42' is shorter than that of ‘PH2TRS'. Including the kernels, the ear of ‘1PAEZ42' has a larger diameter than that of ‘PH2TRS'.

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 early in season

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

LEAF BLADE (JUST ABOVE UPPER EAR): intermediate degree of undulation of margin, very 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, medium length of main axis above highest lateral branch
LATERAL BRANCHES: slightly recurved, very small 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): medium intensity of anthocyanin colouration

EAR: medium intensity of anthocyanin colouration of silks, conico-cylindrical shape, very many rows of grain, medium intensity of anthocyanin colouration on glumes of cob
KERNEL: intermediate type, yellow on top, yellow orange on dorsal side

Origin & Breeding History: ‘1PAEZ42' 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 ‘PH2TRS' and ‘PH2G46', conducted in Puerto Vallarta, Mexico in 2013. The F2 generation underwent haploidization, followed by chromosome doubling and selfing, as part of a field experiment conducted in Arica, Chile, which was planted in February 2014. Resulting DH1 lines were self pollinated and harvested in bulk. ‘1PAEZ42' was selected in 2014 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 ‘1PAEZ42' was conducted in Coteau-du-Lac, Quebec during the 2022 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 202200374, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for '1PAEZ42' with reference variety 'PH2TRS'

Ear length (cm)

Ear diameter (including kernels) (cm)

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Corn: '1PAEZ42' (top) with reference variety 'PH2TRS' (bottom)