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Introduction to the Chuanmai 39 (formerly Chuan 00062) wheat variety

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Characteristics: Spring type, average whole growth period 201.7 days. Seedlings semi-upright, medium tillering ability, seedling leaves relatively narrow, leaf color dark green. Plant height 89.8 cm, leaf sheaths with much wax bloom, stems tough, good lodging resistance. Spike rectangular, long awns, white glumes, white grains, vitreous. Average 236,000 spikes per mu, 35.5 grains per spike, 1000-grain weight 51.3 g. Inoculated disease resistance identification: immune to leaf rust and stem rust, highly resistant to stripe rust, highly susceptible to powdery mildew, highly susceptible to Fusarium head blight. Mixed samples tested in 2003/2004 respectively:

Characteristics: Spring type, average whole growth period 201.7 days. Seedlings semi-upright, medium tillering ability, seedling leaves relatively narrow, leaf color dark green. Plant height 89.8 cm, leaf sheaths with much wax bloom, stems tough, good lodging resistance. Spike rectangular, long awns, white glumes, white grains, vitreous. Average 236,000 spikes per mu, 35.5 grains per spike, 1000-grain weight 51.3 g. Inoculated disease resistance identification: immune to leaf rust and stem rust, highly resistant to stripe rust, highly susceptible to powdery mildew, highly susceptible to Fusarium head blight. Mixed samples tested in 2003/2004 respectively: test weight 807/826 g/L, protein content 14.1/14.2%, wet gluten content 30.2/27.4%, sedimentation value 46.3/45.9 mL, water absorption 62.7/60.9%, dough stability time 5.9/8.4 minutes, maximum resistance to extension 592/532 E.U, extension area 126.7/102.5 sq cm.

Yield performance: In the 2002-2003 season, it participated in the regional trial of the upper reaches group of the winter wheat region of the Yangtze River Basin, with an average yield of 297.8 kg per mu, 2.4% lower than the control Chuanmai 107 (not significant); in the 2003-2004 season continued trial, average yield 342.0 kg per mu, 2.0% lower than the control Chuanmai 107 (not significant). In the 2003-2004 season production trial, average yield 358.5 kg per mu, 0.9% lower than the control Chuanmai 107.

Key cultivation techniques: Sow early at the proper time, sowing period from Frost's Descent to Start of Winter, appropriately increase seeding rate, 140,000-180,000 basic seedlings per mu. Apply about 10 kg pure nitrogen, 7 kg phosphorus, and 7 kg potassium fertilizer per mu, apply heavy basal fertilizer (70%), early seedling fertilizer (topdressing 20%) and jointing fertilizer (10%). Pay attention to control of powdery mildew, Fusarium head blight and aphids.

Approval opinion: Upon review, this variety meets the national @#@245@#@ variety approval standards and has passed approval. It is suitable for planting in areas with medium and above-average wheat yield levels in Sichuan, Chongqing, Guizhou, Yunnan, southern Shaanxi, Nanyang in Henan, and northern Hubei in the upper reaches of the Yangtze River winter wheat region.

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