PH48AR

Corn

Variety Description

Variety used for comparison: 'PH18G5'

Summary: Silk emergence for the plants of 'PH48AR' occurs mid season whereas that for the plants of 'PH18G5' occurs late in the season. The ratio of height of insertion of the peduncle of the upper ear to the plant height for 'PH48AR' is large whereas for 'PH18G5' the ratio is medium. The leaf blade just above the upper ear of 'PH48AR' is wider than that of 'PH18G5'. In the middle third of the main branch of the tassel, the anthers of 'PH48AR' have a strong intensity of anthocyanin colouration whereas those of 'PH18G5' have a medium intensity of anthocyanin colouration. The apex and middle of the glumes on the tassel of 'PH48AR' have a weak intensity of anthocyanin colouration whereas those of 'PH18G5' have a medium intensity of anthocyanin colouration. The ear of 'PH48AR' is longer than that of 'PH18G5'. The plants of 'PH48AR' have a low percentage of tillering whereas for the plants of 'PH18G5' tillering is absent.

Description:

PLANT: inbred yellow variety, large ratio of height of insertion of peduncle of upper ear to plant height, anthesis occurs late in season, silk emergence occurs mid season

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

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

TASSEL: few primary lateral branches, moderately sparse spikelets on middle third of main branch, long main axis above lowest and highest lateral branch
LATERAL BRANCHES: straight, medium sized 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): strong 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, absent or very weak intensity of anthocyanin colouration on glumes of cob
EAR WINGS: present on a high percentage of plants, short
KERNEL: intermediate type, yellow on top, yellow orange on dorsal side

TILLERING: present on a low percentage of plants

Origin & Breeding History: 'PH48AR' was developed by Pioneer Hi-Bred International, Inc. using a double haploid plant breeding method. In 2012, a cross was conducted between proprietary inbred lines in Marion, Iowa, USA. The F1 generation underwent a haploidization process with subsequent chromosome doubling and selfing. In 2013, selected DH1 lines were self pollinated and harvested in bulk. From 2014 to 2015, the DH2 to DH4 lines were self pollinated with subsequent ear selections, respectively. 'PH48AR' 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 D6 seed was bulked as breeder seed in Puerto Vallarta, Mexico in 2017.

Tests & Trials: The comparative trial for 'PH48AR'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 30 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 202000335, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for 'PH48AR' with reference variety 'PH18G5'

Leaf blade width (cm)

Ear length (cm)

Click on image for larger view

Corn: 'PH48AR' (left) with reference variety 'PH18G5' (right)

Click on image for larger view

Corn: 'PH48AR' (top) with reference variety 'PH18G5' (bottom)