6PTLT42B

Wheat

Variety Description

Variety used for comparison: '25R47'

Summary: At the 5-9 tiller stage, the plants of ‘6PTLT42B' have a semi-prostrate growth habit while the plants of '25R47' have an intermediate growth habit. At booting, ‘6PTLT42B' has a low frequency of plants with recurved flag leaves while '25R47' has a high frequency of plants with recurved flag leaves. At heading, the spike of ‘6PTLT42B' has strong glaucosity while the spike of ‘25R47' has weak glaucosity. At maturity, the straw of ‘6PTLT42B' has a thin pith in cross section while that of '25R47' has a pith of medium thickness in cross section. The spike of ‘6PTLT42B' is white while the spike of '25R47' is brown. The spike of ‘6PTLT42B' has an erect attitude while the spike of '25R47' has a nodding attitude.

Description:

PLANT: common wheat, winter type, semi-prostrate growth habit at 5 to 9 tiller stage, low frequency of plants with recurved flag leaves, heads emerge late in the season

SEEDLING (4 LEAF STAGE): glabrous sheath and blade of lower leaves

FLAG LEAF: absent or very weak anthocyanin colouration of the auricles, absent or very weak glaucosity of sheath, glabrous sheath and blade

CULM: absent or very weak glaucosity at heading, straight neck
STRAW (AT MATURITY): thin pith in cross-section

SPIKE: strong glaucosity at heading, parallel sided in profile at heading, dense, white at maturity, erect attitude
AWNS: longer than spike, brown at maturity

KERNEL: soft red type, amber

Origin & Breeding History: ‘6PTLT42B' (experimental designation 6035DR59-01) was developed using the double haploid method of plant breeding. The variety resulted from a cross between a proprietary line and the variety 'W030258E2' conducted at Pioneer Hi-Bred International, Inc. in Windfall, Indiana, USA in 2014. Haploid induction occurred on the resulting F1 generation in 2015. The variety was advanced in Windfall, Indiana based on grain yield, test weight, maturity, disease resistance, plant type, plant height, head type, straw strength as well as milling and baking characteristics with one D0 line designated as 6035DR59-01 in 2015. Breeder seed was established at the D3 generation in 2020.

Tests & Trials: The comparative trial for ‘6PTLT42B' was conducted at Pioneer Hi-Bred Production Limited in Caledon, Ontario during the 2023 growing season. There were 3 replicates arranged in an RCB design. Each plot consisted of 7 rows, each row measuring 3.6 metres long, with an inter-row spacing of 20 cm. The planting density resulted in 7800 plants per variety per year. Measured characteristics were based on 24 measurements per variety per year. Results were supported by the official technical examination report 202300050, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

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Wheat: ‘6PTLT42B' (left) with reference variety ‘25R47' (right)

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Wheat: ‘6PTLT42B' (left) with reference variety ‘25R47' (right)