Square Insecticidal Protein Concentration Relate to its Biomass in Bt Cotton

文献类型： 外文期刊

第一作者： Mingyuan Zhou

作者： Mingyuan Zhou;Yabing Li;Qin Cui;Eltayib. H. M. A. Abidallha;Yuan Chen;Dehua Chen

作者机构：

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN： 0002-1962

年卷期： 2019 年 111 卷 2 期

页码：

收录情况： SCI

摘要： Bt transgenic cotton has been cultivated in China and many other cotton production areas in the world. However, the insecticidal efficacy is often low for the reproductive organs, especially for the cultivars with a big boll in China. The objective of the study focused on the effect of square biomass on the Bt protein concentration during the squaring period for Bt cotton. In the variety effect study in 2015 and 2016, two hybrid Bt cultivars (Sikang3 and Sumian29) and two conventional Bt cultivars (Sikang1 and Nucotn33B) were compared for square biomass and Bt toxin content from 15 to 25 d after square appearance (DASP) during the cotton growing seasons. Cultivars with high square biomass for individual and whole plant had higher insecticidal protein content. In the cultural practice effect study in 2017, the experiment of mepiquat chloride (MC) dose and different nitrogen deficit extents were designed to further investigate the relationship between square biomass and square Bt protein concentration. The MC application significantly increased square mass and square Bt protein content. In contrast, the nitrogen deficit decreased square mass together with square insecticidal protein concentration. The positive correlation between square biomass (the individual square biomass and the square biomass per plant) and square insecticidal protein content was highly significant in variety study and cultural practice study. The results indicated that increment of square development by variety selection and cultural practice could increase insect resistance during squaring period of Bt cotton.

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