6PZNF07B

Wheat

Variety Description

Varieties used for comparison: '25R46' and '6PSQD81B'

Summary: At the 5-9 tiller stage, the plants of '6PZNF07B' have a semi-erect growth habit while those of '25R46' have an erect growth habit. At booting, '6PZNF07B' has a low frequency of plants with recurved flag leaves while '25R46' has a very high frequency of plants with recurved flag leaves. The flag leaf of '6PZNF07B' is shorter than that of '6PSQD81B' and wider than those of both reference varieties. The flag leaf sheath of '6PZNF07B' has an absent or very weak degree of glaucosity while the flag leaf sheath of '25R46' has a weak degree of glaucosity. At heading, the spike of '6PZNF07B' has an absent or very weak degree of glaucosity while the spike of '25R46' has a medium to strong degree of glaucosity and that of '6PSQD81B' has a weak degree of glaucosity. The culm neck of '6PZNF07B' has a medium degree of glaucosity while the culm neck of '25R46' has a very strong degree of glaucosity and that of '6PSQD81B' has weak degree of glaucosity. At maturity, the plants of '6PZNF07B' are taller than those of '25R46' and '6PSQD81B'. The spike of '6PZNF07B' is parallel sided in profile whereas the spike of the reference varieties are fusiform in profile. The spike, excluding the awns, of '6PZNF07B' is longer than the spike of '25R46'. The spike of '6PZNF07B' has a nodding attitude while those of the reference varietes have an inclined attitude. The culm neck of '6PZNF07B' is straight while that of '6PSQD81B' is curved. The lower glume of '6PZNF07B' is slightly sloping while that of '25R46' is sloping. The lower glume of '6PZNF07B' is short while the lower glume of '6PZNF07B' is medium in length and that of '25R46' is medium to long.

Description:

PLANT: common wheat, winter type, semi-erect 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: very strong intensity of anthocyanin colouration of auricles, absent or very weak glaucosity of sheath, glabrous blade and sheath

CULM NECK: medium degree of glaucosity at heading, straight
STRAW (AT MATURITY): thin pith in cross-section

SPIKE: absent or very weak glaucosity at heading, parallel sided shape in profile, medium density, coloured at maturity, nodding attitude
AWNS: longer than spike, brown at maturity
LOWER GLUME: short, medium width, glabrous, sparse internal hair
LOWER GLUME SHOULDER: absent or very narrow, slightly sloping
LOWER GLUME BEAK: very short, slightly curved
LOWEST LEMMA: slightly curved beak

KERNEL: soft red type, medium red, large, medium length, wide, broad elliptical, rounded cheek, medium length brush hairs, crease of medium width and depth
GERM: medium size, oval

Origin & Breeding History: '6PZNF07B' (experimental designation XW18U) was developed using the pedigree method of plant breeding. The variety resulted from a three way cross. Two initial crosses were conducted, the first between a proprietary line and '25R34' and the second between a proprietary line and '25R47'. The resulting progeny were used as the parental lines in the final cross conducted at Pioneer Hi-Bred International, Inc. in Windfall, Indiana, USA in 2011. 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. One F7 line was designated as XW18U in 2018. Breeder seed was established at the F9 generation in 2020.

Tests & Trials: The comparative trial for '6PZNF07B' was conducted at Pioneer Hi-Bred Production Limited in Caledon, Ontario during the 2021 growing season. There were 3 replicates arranged in an RCB design. Each plot consisted of 6 rows, each row measuring 3.2 metres long, with an inter-row spacing of 30 cm. The planting density resulted in a total of 7800 plants per variety. Measured characteristics were based on 24 measurements per variety. Mean differences were significant at the 5% confidence probability level based on a paired Student's t-test. Results were supported by the official technical examination report 202100021, purchased from the Plant Variety Protection Office in Washington, District of Columbia, USA.

Comparison tables for '6PZNF07B' with reference varieties '25R46' and '6PSQD81B'

Flag leaf length (cm)

Flag leaf width (mm)

Plant height at maturity (stem plus spike, including awns) (cm)

Spike length (excluding awns) (cm)

Click on image for larger view

Wheat: '6PZNF07B' (left) with reference varieties '25R46' (centre) and '6PSQD81B' (right)