Study on the Survival Competitive Ability and Environmental Adaptability of Transgenic Drought-resistant Cotton

PurposeTo study the survival competitiveness and environmental adaptability of transgenic cotton in wasteland and cultivated land, and to provide theoretical basis for environmental safety evaluation.

MethodThe drought-resistant cotton of KatG and SacB genes was used as research object to study the environmental adaptation, survival competitiveness and impact on the farmland biomes of transgenic drought-resistant cotton in wasteland and cultivated land. Based on the climate condition of Xinjiang, the possibility of transgenic cotton being transformed into weeds under wasteland conditions was analyzed. The ecological information theory was used to analyze the effects of transgenic drought-resistant cotton on biomes.

ResultThe test materials for surface spreading in the three test areas failed to emerge, and the seedling rate of underground seeding materials was lower, the highest seedling rate was 47.3%, the plant was short, the plant height was 39.8 cm, and the flowering buds could not be flowered during the growth cycle. The Shannon-Wiener index of the weed communities in the three experimental areas was 2.232, the minimum was 2.070, the uniformity index was 0.920, and the minimum was 0.737. There was no significant difference between different cotton planting areas in the same experimental area (P>0.05); the Shannon-Wiener index of the weed community at different planting depths was 1.603 at the maximum, the minimum was 1.188, the uniformity index was at most 0.874, the minimum was 0.615, and there was no significant difference in the Shannon-Wiener index of weeds among the same cotton materials (P>0.05); under different planting densities, the Shannon-Wiener index of the weed community was 1.455, the minimum was 1.263, the uniformity index was 0.918, the minimum was 0.615, and the Shannon-Wiener index of weeds among the same cotton materials was not significantly different (P>0.05).

ConclusionThe environmental adaptability of transgenic drought-tolerant cotton in the wasteland of Xinjiang is weak, and the grain-splitting cotton has no possibility of wintering, and the possibility of becoming weeds is negligible. The survival competition between the wasteland ecological region and other species is at a disadvantage, and will not significantly affect the community diversity and species distribution within the planting area.