玉米小斑病菌(Helmidthosporitim maydis)在 T 和 C 细胞质术育系上连续继代侵染15代后,对 T 和 C 细胞质雄性不育系和相应正常细胞质保持系的致病力均明显提高。其中尤以在 T 和 C 细胞质玉米上提高更快.因而大面积种植单一的品种,特...玉米小斑病菌(Helmidthosporitim maydis)在 T 和 C 细胞质术育系上连续继代侵染15代后,对 T 和 C 细胞质雄性不育系和相应正常细胞质保持系的致病力均明显提高。其中尤以在 T 和 C 细胞质玉米上提高更快.因而大面积种植单一的品种,特别是种植含有单一的雄性不育细胞质的玉米将会对小斑菌的生长与侵柒形成一种极为有利的条件而加速导致小斑病流行的可能, 因为雄性不育细胞质玉米对小斑菌的侵染比较敏感。展开更多
GM （genetically modified） corn with the CrylAb, mCry3A and Vip3Aa20 protein of Bt （Bacillus thuringiensis） and its respective isoline as control with and without chemical control for corn earworm were used in this...GM （genetically modified） corn with the CrylAb, mCry3A and Vip3Aa20 protein of Bt （Bacillus thuringiensis） and its respective isoline as control with and without chemical control for corn earworm were used in this research. Fusarium corncob damage was lower on GM corn with （12.5%） and without （25.7%） insecticide treatment as compared with the isoline that had 48.3% and 83.1% of damaged corncobs with and without chemical control, respectively. Corn smut cob damage was also lower on GM corn with （3.2%） and without （6.3%） insect control compared with 15.5% and 49.7% damage with and without insecticide treatment, respectively. Fusarium sp. corncob rot was also lower on GM corn with 5.7% and 9.5% whereas a 24.6% and 63% rot was observed on the isoline with and without insecticide control, respectively. Ustilago maydis severity was also lower on Bt corn finding 0.07% and 0.25% damage on treatments with and without insect control as compared with the isoline that showed an 11.6% and a 41.4% smut rot with and without insecticide treatment, respectively. The authors conclude that GM corn resistant to Helicoverpa zea prevents damage by the pest, eliminating the entrance pathway for Fusarium sp. and Ustilago maydis.展开更多
文摘玉米小斑病菌(Helmidthosporitim maydis)在 T 和 C 细胞质术育系上连续继代侵染15代后,对 T 和 C 细胞质雄性不育系和相应正常细胞质保持系的致病力均明显提高。其中尤以在 T 和 C 细胞质玉米上提高更快.因而大面积种植单一的品种,特别是种植含有单一的雄性不育细胞质的玉米将会对小斑菌的生长与侵柒形成一种极为有利的条件而加速导致小斑病流行的可能, 因为雄性不育细胞质玉米对小斑菌的侵染比较敏感。
文摘GM （genetically modified） corn with the CrylAb, mCry3A and Vip3Aa20 protein of Bt （Bacillus thuringiensis） and its respective isoline as control with and without chemical control for corn earworm were used in this research. Fusarium corncob damage was lower on GM corn with （12.5%） and without （25.7%） insecticide treatment as compared with the isoline that had 48.3% and 83.1% of damaged corncobs with and without chemical control, respectively. Corn smut cob damage was also lower on GM corn with （3.2%） and without （6.3%） insect control compared with 15.5% and 49.7% damage with and without insecticide treatment, respectively. Fusarium sp. corncob rot was also lower on GM corn with 5.7% and 9.5% whereas a 24.6% and 63% rot was observed on the isoline with and without insecticide control, respectively. Ustilago maydis severity was also lower on Bt corn finding 0.07% and 0.25% damage on treatments with and without insect control as compared with the isoline that showed an 11.6% and a 41.4% smut rot with and without insecticide treatment, respectively. The authors conclude that GM corn resistant to Helicoverpa zea prevents damage by the pest, eliminating the entrance pathway for Fusarium sp. and Ustilago maydis.
