PH42V3

Corn

Variety Description

Variety used for comparison: 'PH12KB'

Summary: For the plants of 'PH42V3', anthesis and silk emergence occur mid-season to late in the season while anthesis emergence occurs late to very late in the season and silk emergence occurs very late in the season for the plants of 'PH12KB'. From the beginning of anthesis to just before milk development, the brace roots of 'PH42V3' have an absent or very weak intensity of anthocyanin colouration while those of 'PH12KB' have a medium to strong intensity of anthocyanin colouration. The main axis of the tassel above the highest lateral branch is very short to short for 'PH42V3' while it is medium in length for 'PH12KB'. Including the tassel, the plants of 'PH42V3' are shorter than the plants of 'PH12KB'. The leaf blade just above the upper ear of 'PH42V3' is narrower than that of 'PH12KB'. The ear of 'PH42V3' is shorter than the ear of 'PH12KB'. The glumes on the cob of 'PH42V3' have a medium to strong intensity of anthocyanin colouration while those of 'PH12KB' have a weak to medium intensity of anthocyanin colouration. The primary ear of 'PH42V3' is located lower on the stem than that of 'PH12KB'.

Description:

PLANT: inbred yellow variety, large ratio for height of insertion of peduncle of upper ear to plant height, anthesis and silk emergence occur mid-season to late in the 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): absent or very weak degree of undulation of margin, small angle with stem, straight

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

EAR: very strong intensity of anthocyanin colouration of silks, short to medium husk (level to extending one quarter the length of the ear above tip), conical shape, many rows of grain, medium to strong intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a high percentage of plants, medium to long
KERNEL: dent type, yellow on top and dorsal side

TILLERING: present on a low percentage of plants

Origin & Breeding History: 'PH42V3' was developed by Pioneer Hi-Bred International, Inc. using a double haploid plant breeding method. In 2008, the initial cross was conducted between proprietary inbred lines in Puerto Vallarta, Mexico. In 2009, the F1 underwent a haploidization process in Oahu, Hawaii, USA. The haploids were doubled and self pollinated with subsequent ear selection. In 2010 and 2013, the D1 and D2 lines were self pollinated and harvested in bulk in Janesville, Wisconsin, USA . In 2014, the D3 line was self pollinated and harvested in bulk in Arica, Chile. In 2015, the D4 line was self pollinated and the D5 seed bulked as breeder seed in Janesville, Wisconsin. 'PH42V3' 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 'PH42V3' 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 30 measurements for the candidate variety and a minimum of 14 measurements for the reference 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 201900159, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH42V3' with reference variety 'PH12KB'

Plant height (including tassel) (metres)

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

Ear length (cm)

Primary ear, height from ground (metres)

Click on image for larger view

Corn: 'PH42V3' (top) with reference variety 'PH12KB' (bottom)