1PHMT48

Corn

Variety Description

Variety used for comparison: 'PH1DBM'

Summary: Anthesis for ‘1PHMT48' occurs mid-season whereas that for ‘PH1DBM' occurs very early in the season. Including the tassel, the plants of ‘1PHMT48' are shorter than those of ‘PH1DBM'. The leaf blade of ‘1PHMT48' is wider than that of ‘PH1DBM'. The angle between the main axis and the lateral branches on the tassel of ‘1PHMT48' is very small whereas that for ‘PH1DBM' is a medium size. The spikelets on the tassel of ‘1PHMT48' are moderately dense whereas those for ‘PH1DBM' are moderately sparse. The ear of ‘1PHMT48' is longer than that of ‘PH1DBM'. Including the kernels, the ear of ‘1PHMT48' has a larger diameter than that of ‘PH1DBM'.

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: medium 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: few primary lateral branches, moderately dense spikelets on middle third of main branch, short main axis above lowest lateral branch, medium length of main axis above highest lateral branch
LATERAL BRANCHES: straight, very small angle with main axis, medium length
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): absent or very weak intensity of anthocyanin colouration

EAR: absent or very weak intensity of anthocyanin colouration of silks, short husk (level with tip), conico-cylindrical shape, very many rows of grain, strong intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a low percentage of plants, short to medium length
KERNEL: dent-like type, yellow on top, orange on dorsal side

TILLERING: absent

Origin & Breeding History: ‘1PHMT48' 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 ‘PH1W4Z' and ‘PH1DBM', conducted in Moorhead, Minnesota, USA in 2012. The F1 generation underwent haploidization, followed by chromosome doubling and selfing, as part of a field experiment conducted in Oahu, Hawaii, USA, which was planted in February 2013. Resulting DH1 lines were self pollinated and harvested in bulk. ‘1PHMT48' 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 ‘1PHMT48' 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 202300214, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for '1PHMT48' with reference variety 'PH1DBM'

Plant height (including tassel) (metres)

Leaf blade width (cm)

Ear length (cm)

Ear diameter (including kernels) (cm)

Click on image for larger view

Corn: '1PHMT48' (top) with reference variety 'PH1DBM' (bottom)