德佳特优级长绒棉品系的性状与竞争优势分析

通过海陆杂交,在其F8代中选出9个稳定的特优级长绒棉品系。对9个特优级长绒棉品系与国际特优级长绒棉代表吉扎45和国内两个普通长绒棉品种新海28号、新海36号在产量、品质方面分析比较,结果表明:一是德优9号在籽棉、皮棉产量上与新海28号、新海36号无显著差异,达到普通长绒棉水平,远远高于吉扎45;二是在纤维品质方面,9个特优级长绒棉品系明显优于两个普通长绒棉品种新海28号、新海36号和吉扎45。

优棉绿色高质高效集成技术探讨

2020年呼图壁县棉花产业落实县域"一主两辅"品种,以"提质量、降成本、增效益"为目标,加快推进棉花产量和品质提升,大力培育和推进机采棉绿色高质高效集成技术,建立优棉绿色高质高效攻关区,推广棉花促早控制技术、农药化肥减量增效技术、绿色防控技术,加强棉花集成技术培训宣传和技术服务,实现棉花的节本增效提质。

Analysis on Marginal Superiority and Yield of Different Wheat Varieties in Wheat-cotton Intercropping System

In wheat-cotton intercropping system,the spike number per unit area,grains per spike,thousand-grain weight and yield of side line and inner line were investigated in six wheat varieties to study the marginal superiority and select suitable wheat varieties intercropped with cotton.The results showed that Xingmai No.4had obvious marginal superiority with the yield of 6 919.0 kg/hm2,so it was the suitable variety for wheat-cotton intercropping system.

昌吉市2021年优质棉超450 kg栽培技术

本文通过引进优质棉良种新农棉1号及相适宜的栽培技术,在原有“矮密早”栽培模式的基础上,依据品种特性,调整播种密度,合理调整收获株数,优化群体结构,精准优化田间管理技术,设立核心示范区大西渠镇龙河村,面积13.33 hm^(2),田间测产籽棉产量为495.39 kg/666.7m^(2),田间实收籽棉产量为490 kg/666.7m^(2)。

Effects of Sowing Rate on Marginal Superiority and Yield of Wheat in Wheat-cotton Intercropping System

In the wheat-cotton intercropping system, total 6 sowing rates （187.5, 225.0, 262.5, 300.0, 337.5 and 375.0 kg/hm2） were arranged, and the effects of sowing rate on marginal superiority and yield of wheat were investigated. The re- sults showed that the effect of sowing rate on inner-line wheat was greater than that on side-line wheat; with the increased sowing rate, the marginal superiority of panicle number was reduced in overall, and the difference in panicle number be- tween inner and side lines was decreased from 9.0×10^5/hm2 （sowing rate of 187.5 kg/hm2） to 7.8×10^5/hm2 （sowing rate of 375.0 kg/hm2）; the marginal superiority of grains per spike was increased first and then reduced, and the largest difference in grains per spike between the inner and side lines reached 4.6 under the sowing rate of 300.0 kg/hm2; the marginal superiority of 1 000-grain weight and yield was gradually increased, and the largest difference in 1 000-grain weight between the inner and side lines reached 3.9 g under the sowing rate of 337.5 kg/hm2, and in yield reached 3 136.5 kg/hm2under the sowing rate of 375.0 kg/hm2. The effects of sowing rate on the three yield factors of intercropped wheat ranked as panicle number 〉 grains per spike 〉 1 000-grain weight. The appropriate sowing rate of wheat was 225.0-262.0 kg/hm2 in the wheat-cotton intercropping system.

Breeding of Good-quality High-yield Salt-tolerant and Drought-resistant Hybrid Cotton Variety Hengyou 12

Salt and drought tolerance, high yield and quality, disease and pest resistance of cotton varieties are new requirements for the current situation in cotton production. Hengyou 12 is a transgenic Bt cotton variety bred by hybridizing JD 28 （interspeciflc progeny of upland cotton, sea-island cotton, wild cotton species） as female parent with GK55 （transgenic Bt cotton variety） as male parent. The combining of parents was based on the complementary principle of parental traits. Hengyou 12 with strong heterosis was selected under disease stress, pest stress, salt stress and drought stress. This variety has many excellent characteristics, such as good resis- tance to diseases and pests, high yield, excellent quality, strong drought resistance and salt tolerance. ＇Hengyou12＇ was approved by Hebei Province in 2015, and is suitable for planting in middle and south areas of Hebei and similar ecological areas in the Yellow River basin.

Grey correlational and SSR analyses of cotton hybrids

Ten upland cotton strains exhibiting 3 fiber quality traits and 8 yield traits, were grown for two years in an investigation of the correlation between grey relational analysis （GRA） and genetic identity in heterosis of cot- ton hybrid. The aim was to establish the optimal approach for heterosis prediction and parent selection. Plant traits data were collected and analyzed for GRA. In addition, 72 simple sequence repeat （SSR） markers were examined and 148 polymorphisms were detected. Correlation analysis of GRA, genetic identity, Ft fiber quality and yield heterosis was conducted. Significant differences were observed between the two analytic methods, whereas compa- rable predictions were given for yield heterosis. GRA for yield exhibited slightly higher correlation than genetic identity analysis, with a correlation coefficient of 0.49. GRA and genetic analysis exhibited overlapping yet dis- tinct advantages in heterosis prediction. Therefore, these analytical methods should be integrated to achieve the op- timal heterosis prediction and parent selection.