Introduction of Bivalent Transgenic Cotton Varieties - Zhongkang 39F1 (Pruning Resistance)

Zhongkang 39F1 is the latest achievement introduced by the Cotton Research Institute of the Chinese Academy of Agricultural Sciences, and it is also a national “863” major scientific and technological achievement. It has been listed as “a key promotion variety of national scientific and technological achievements”. It contains two genes, BT and CPT1, which combine high-yield, high-quality, insect-resistance, disease resistance (inverse) and other fine traits. It is China's first nationally-accepted dual-value transgenic insect-resistant cotton [National Auditing Cotton 20000002] ]. Its appearance indicates that China's insect-resistant cotton breeding has reached the world's advanced level. Characteristics: Medium-resistance 39F1, a medium-early maturing variety with a growth period of 125 days; large plants, plant height of about 110cm, compact plant type, dark green leaves, strong photosynthetic performance, early maturing and premature aging, well-developed roots, thick stalks, Resistance to lodging; leaf petiole with hairy, few cottonseed, high resistance to wilt disease, blight, cotton bollworm, resistance to verticillium wilt; fruiting nodes short, concentrated bells; high yield, seed refers to 9.8 grams, 40% of clothing, The boll weight is more than 6 grams; the boll opening is smooth, the output is high, the fiber is bright white, and the quality is excellent. Fertility characteristics: Zhongguo 39F1 seedling grows quickly and steadily, drought tolerant, saline-alkali resistance, first fruit branch with a high birth rate (1-2 sections higher than 33B), not rotten peach, short fruit branch, internode Short, rapid emergence of buds, buds, bells, three peach coordination ratio, compact plant type, less nutrition, management is simple. Cultivation points: 1, sowing time is suitable for wheat cotton and spring cotton live spring cotton mulch film live seedlings on April 20 before and after, acres sowing 1 kg, seedlings can be advanced to the end of March to early April sowing. 2, planting density spacing of 1-1.2 meters, spacing 0.35-0.4 meters, per mu 1500-1800 strains, the general choice of high-yield low-density cotton fields, high-yield cotton fields to choose high density, but up to no more than 2,000. 3, scientific application of fertilizer and fertilizer to the main base fertilizer, forced fertilizer supplemented by multiple application of phosphate and potash. 4, the anti-39F1, cotton is not cultivating life. Only weeding, pruning, non-fighting, and management labor, due to plant height, should be appropriately controlled as the growth of cotton. 5, pest control: the whole growth period generally does not need to control cotton bollworm, aphid, spider mites interval prevention. Avoid hazards.

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