Abstract: [Objective] The aim of the study was to study the responses of the test-tube plantlets of transgenic AtGAPC2 potato to low phosphorus stress and to screen the excellent lines with resistance to low phosphorus. [Method] 26 transgenic lines and no-transgenic "Chuanyu 10" varieties were cultured in two phosphorus levels (1.25 mmol/L, 0.0125 mmol/L). In addition, the relevant indicators were determined. [Results] Compared to "Chuanyu 10", transgenic lines showed faster growth, more developed root system and higher production under low phosphorus stress. Those lines were divided into four levels by fuzzy subordination method. 96.15% transgenic lines performed better than "Chuanyu 10" did. The first level including five strains (L13, L1, L3, L18 and L19)was best. Combination with the comprehensive value of tuber yield per plant, L13, L1 and L3 three strains were eventually selected. The comprehensive value of tuber yield per plant were 56.2%, 93.0% and 83.1% respectively, which were 26.1% higher than that of "Chuanyu 10". [Conclusion] The AtGAPC2 gene can improve the tolerance of test-tube plantlets to low phosphorus stress.

Key words: potato, transgenic, AtGAPC2, tolerance to low phosphorus

中图分类号: 

• Q94