PH42YG

Corn

Variety Description

Variety used for comparison: 'PHW6G'

Summary: From the beginning of anthesis to just before milk development, the brace roots of 'PH42YG' have a strong to very strong intensity of anthocyanin colouration while those of 'PHW6G' have an absent or very weak to weak intensity of anthocyanin colouration. Including the tassel, the plants of 'PH42YG' are shorter than the plants of 'PHW6G'. The leaf blade just above the upper ear of 'PH42YG' is wider than that of 'PHW6G'. The ear of 'PH42YG' is longer, and including the kernels, has a larger diameter than that of 'PHW6G'. The glumes on the cob of 'PH42YG' have a strong intensity of anthocyanin colouration while those of 'PHW6G' have a weak intensity of anthocyanin colouration. The primary ear on the stem of 'PH42YG' is located lower on the stem than that of 'PHW6G'.

Description:

PLANT: inbred yellow variety, small ratio for height of insertion of peduncle of upper ear to plant height, anthesis occurs late in the season, silk emergence occurs mid-season to late in the season
STEM: absent or very slight degree of zig-zag, strong to very strong intensity of anthocyanin colouration on brace roots

LEAF BLADE (JUST ABOVE UPPER EAR): intermediate degree of undulation of margin, very small to small angle with stem, straight

TASSEL: few to a medium number of primary lateral branches, medium density of spikelets on middle third of main branch, main axis above lowest lateral branch short to medium in length, main axis above highest lateral branch short
LATERAL BRANCHES (SECOND BRANCH FROM BOTTOM OF TASSEL): straight to slightly recurved, small angle with main axis, medium to long
GLUME: absent or very weak intensity of anthocyanin colouration throughout
ANTHER (ON MIDDLE THIRD OF MAIN BRANCH): absent or very weak to weak intensity of anthocyanin colouration

EAR: absent or very weak intensity of anthocyanin colouration of silks, medium to long husk (extends between one quarter to one third the length of ear above tip), cylindrical shape, few to a medium number of rows of grain, strong intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a medium to high percentage of plants, short to medium in length
KERNEL: flint-like type, yellow on top and dorsal side

TILLERING: present on a very low to low percentage of plants

Origin & Breeding History: 'PH42YG' was developed by Pioneer Hi-Bred International, Inc. using a double haploid plant breeding method. In 2009, the initial cross was conducted between two F1 proprietary hybrids in Janesville, Wisconsin, USA. In 2010, the F1 underwent a haploidization process in Arica, Chile. The haploids were doubled and self pollinated with subsequent ear selection. In 2011 and 2013, the D1 to D3 lines were self pollinated and harvested in bulk in Janesville, Wisconsin. In 2014, the D4 line was self pollinated and harvested in bulk in Kekaha, Kauai, Hawaii. In 2014, the D5 line was self pollinated and the D6 seed bulked as breeder seed in Janesville, Wisconsin. 'PH42YG' was selected based on yield in hybrid combination, tassel size, pollen production, germination ability, stalk lodging resistance, late season plant health, grain quality, as well as disease and insect resistance.

Tests & Trials: The comparative trial for 'PH42YG' was conducted in Coteau-du-lac, Quebec during the 2019 growing season. The trial was planted in a RCB Design with 3 replicates. Each replicate consisted of one row of approximately 20 plants, 3 metres in length with 76 cm between the rows. There was a total of 50 to 60 plants per variety. Measured characteristics were based on a minimum of 29 measurements per variety. Mean differences were significant at the 5% probability level based on paired Student's T-tests. Results were supported by the official technical examination report 201900152, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH42YG' with reference variety 'PHW6G'

Plant height (including tassel) (metres)

Leaf blade width (leaf just above upper ear) (cm)

Ear length (cm)

Ear diameter (in middle including kernels) (cm)

Primary ear, height from ground (metres)

Click on image for larger view

Corn: 'PH42YG' (top) with reference variety 'PHW6G' (bottom)