New cotton varieties examined by the State in 2006

Xiangzamian 11

This variety was jointly cultivated by Hunan Cotton Science Research Institute (15 Qiaonan Yuxia Avenue, Changde City, Hunan Province, postcode: 415101) and Biotechnology Research Institute of Chinese Academy of Agricultural Sciences.

Characteristics: it is a transgenic insect-resistant hybrid variety with a growth period of 126 days in spring sowing in the Yangtze River Basin. Plant tower type, plant height 113.1cm, stalk stout, more hairy, leaves medium size, dark green, fruit branch beginning node 6.6 nodes, single plant boll 23.8, boll oval, single boll weight 6.2g, lint percentage 40.7%, seed finger 11.3g, pre-frost flowering rate 89.3%. Resistant to Fusarium wilt and Verticillium wilt, high resistance to red bollworm, medium resistance to cotton bollworm. The yields of seed cotton, lint and pre-frost lint are 230kg/667 square meters, 93kg/667 square meters and 83kg/667 square meters respectively. It is suitable for spring sowing and planting in the south of Huaihe River in Jiangsu and Anhui and in the Yangtze River valley of Zhejiang, Jiangxi, Hubei, Hunan and Henan.

Main points of cultivation: ① sowing. The seeds were sown in the first and middle of April and the seedlings were raised in a nutrition bowl. ② transplant. Generally, cotton seedlings have 3 or 4 true leaves and red stems, but transplanting is completed before May 20: 1500 plants are planted in medium fertility land and 1600 plants per 667m2 in hilly and sandy land. ③ fertilization. Apply sufficient base fertilizer, increase potassium fertilizer, re-apply flower and boll fertilizer, and timely spray foliar fertilizer in the later stage. Chemical regulation should be carried out according to the growth of cotton, and the principles of light before, moderate, heavy after, small amount and many times should be mastered. ④ pest control. Emphasis should be placed on the control of non-Lepidoptera pests such as aphids, red spiders, bug bugs and Spodoptera litura, and attention should be paid to the control of the fourth and fifth generations of cotton bollworm in the year of heavy occurrence of cotton bollworm.

Xinlumian No. 1

This variety is jointly cultivated by the Institute of Economic crops, Academy of Agricultural Sciences (No. 3, Nanchang Road, Urumqi, postcode: 830011) and the Institute of Biotechnology, Chinese Academy of Agricultural Sciences.

Characteristics: it is a conventional transgenic variety with insect resistance. The whole growth period of spring sowing in northwest inland cotton region is 143 days. Plant tower type, loose, plant height 65cm, stem hard and elastic, villous, Ⅱ fruit branch, leaf medium size, dark green, deeply notched, stem and petiole with glands, fruit branch initial node 4.9 nodes, boll per plant 7.9, bell oval, bell tip, single boll weight 5.8 g, lint percentage 40.7%, seed finger 10.9 g, pre-frost flower rate 88.9%. Resistant to Fusarium wilt and Verticillium wilt, resistant to cotton bollworm. The yields of seed cotton, lint and pre-frost lint are 319kg/667 square meters, 129kg/667 square meters and 117kg/667 square meters respectively. It is suitable for planting in early and medium-maturing cotton areas in the northwest inland.

Main points of cultivation: sowing in the middle of April, the theoretical density is 10 ~ 12000 plants per 667m2. The amount of fertilizer application is determined according to the yield and land conditions. In order to apply sufficient base fertilizer and increase organic fertilizer and phosphorus and potassium fertilizer, the topdressing period is slightly earlier than that of conventional cotton, and each topdressing must be mixed with potash fertilizer, and the amount of topdressing is the same as that of conventional cotton. Heavy application of bud fertilizer, heavy topdressing of flower and boll at the beginning of flower and boll, re-application of top fertilizer at the peak of flower and boll, foliar fertilizer as appropriate, and special fertilizer for cotton should ensure the amount of potash fertilizer. In the normal year of Rain Water, chemical control was carried out for 3 to 4 times, 2g in full bud stage, 5g in early flowering stage and 5g ~ 10g in 5 days after topping. Timely ploughing, weeding and watering to ensure that the soil in the cotton field is loose, not dry or waterlogged.

Shandong Mianyan 29

This variety is jointly cultivated by Shandong Cotton Research Center (No. 202Industrial North Road, Jinan City, Shandong Province, postcode: 250100) and Institute of Biotechnology, Chinese Academy of Agricultural Sciences.

Characteristics: it is a conventional transgenic variety with insect resistance, and the growth period of spring sowing in the Yellow River Basin is 125 days. The plant type is loose, the plant height is 96cm, the stem is hairy, the leaf is moderately large and dark green, the fruit branch begins at 7.3nodes, the bolls per plant are 17.7, the bolls are oval, the single boll weight is 5.4g, the lint percentage is 39.4%, the seed finger is 10.58, and the pre-frost flowering rate is 92.9%. The seedling emergence is better, the early growth is general, the middle and late growth is strong, the uniformity is better, the leaf function is better in the later stage, the boll is concentrated and the floc is smooth. Resistant to Fusarium wilt, Verticillium wilt and cotton bollworm. The yields of seed cotton, lint and pre-frost lint are 231kg/667 square meters, 93kg/667 square meters and 90kg/667 square meters respectively. It is suitable for spring sowing in cotton areas in central and southern Hebei, Shandong, eastern, northern and central Henan, and in the Yellow River basin north of the Huaihe River in Jiangsu and Anhui provinces.

Key points of cultivation: sowing before and after April 20, the sowing density is 3000 plants per 667m2. Select land with high fertilizer and water, apply sufficient base fertilizer, re-apply flower and boll fertilizer, and timely watering to prevent premature senility in case of summer drought. In general, chemical regulation is carried out at bud stage, early flowering stage and full flowering stage. Emphasis is placed on the control of non-Lepidoptera pests such as cotton aphid, cotton leaf mite, Bemisia Tabaci and Bemisia Tabaci. The second generation of cotton bollworm does not need to be controlled, and the third and fourth generations each control twice.

The above approved varieties are all transgenic varieties and should be promoted strictly in accordance with the scope allowed by the safety certificate of agricultural genetically modified organisms.