The seedlings of 6 rice varieties were treated with Cd concentrations of 25,50 and 100μmol/L for 5 d.The results showed that the longest root length,seedling height,fresh weight per plant and dry weight per plant of ...The seedlings of 6 rice varieties were treated with Cd concentrations of 25,50 and 100μmol/L for 5 d.The results showed that the longest root length,seedling height,fresh weight per plant and dry weight per plant of 6 rice varieties were significantly inhibited.The inhibiting effects showed a trend as the following:the longest root length>fresh weight per plant>dry weight per plant>seedling height,and the inhibiting effect increased with the increase of Cd stress concentration.It is more economical and reasonable to use 50μmol/L Cd stress concentration to identify Cd tolerance of rice seedlings.And it is more scienti fic to evaluate the Cd tolerance of rice seedling comprehensively by using the 4 indexes of longest root length,fresh weight per plant,dry weight per plant and seedling height.展开更多
In order to screen new rice lines with low cadmium accumulation,20 rice materials/lines bred by Hunan Rice Research Institute were planted in three cadmium-contaminated areas for three consecutive years.The contents o...In order to screen new rice lines with low cadmium accumulation,20 rice materials/lines bred by Hunan Rice Research Institute were planted in three cadmium-contaminated areas for three consecutive years.The contents of cadmium in rice were detected and compared with those of emergency varieties Xiangwanxian 13 and Yangdao 6,which had low cadmium accumulation and high cadmium accumulation respectively.The results showed that the cadmium contents of 20 materials were lower than that of Yangdao 6,and 16 materials were lower than that of Xiangwanxian 13.Among them,10 materials such as R1195 were significantly lower than that of Xiangwanxian 13 and 8 materials such as BG130 were most significantly lower than that of Xiangwanxian 13.The low cadmium accumulation male sterile lines W115S and restorer lines R1195 and R1514 were screened out.展开更多
Bangcangjingnuo is a new, mid-maturing conventional Japonica type glutinous rice variety bred by Hunan Rice Research Institute and Hunan Wucai Agricultural Science and Technology Development Co., Ltd. In 2017, the Hun...Bangcangjingnuo is a new, mid-maturing conventional Japonica type glutinous rice variety bred by Hunan Rice Research Institute and Hunan Wucai Agricultural Science and Technology Development Co., Ltd. In 2017, the Hunan Crop Variety Examination and Approval Committee approved Bangcangjingnuo. The breeding process of this cultivar was expounded in this study. This cultivar is highly glutinous and waxy, it produces a stable high yield, and it possesses the quality of low temperature resistance. The theoretical yield of Bangcangjingnuo is 8 731.5 kg/hm^2, and the actual output is about 7 422.0 kg/hm^2 according to the 85% discount.Finally, we described the main points of cultivation technique from the perspectives of timely planting and strict seed sterilization.展开更多
基金Supported by Changsha Science and Technology Project(kq180103)Hunan Agricultural Science and Technology Innovation Fund Project(2017XC10)Hunan Agricultural Science and Technology Innovation Fund Project(2017JC12)~~
文摘The seedlings of 6 rice varieties were treated with Cd concentrations of 25,50 and 100μmol/L for 5 d.The results showed that the longest root length,seedling height,fresh weight per plant and dry weight per plant of 6 rice varieties were significantly inhibited.The inhibiting effects showed a trend as the following:the longest root length>fresh weight per plant>dry weight per plant>seedling height,and the inhibiting effect increased with the increase of Cd stress concentration.It is more economical and reasonable to use 50μmol/L Cd stress concentration to identify Cd tolerance of rice seedlings.And it is more scienti fic to evaluate the Cd tolerance of rice seedling comprehensively by using the 4 indexes of longest root length,fresh weight per plant,dry weight per plant and seedling height.
文摘In order to screen new rice lines with low cadmium accumulation,20 rice materials/lines bred by Hunan Rice Research Institute were planted in three cadmium-contaminated areas for three consecutive years.The contents of cadmium in rice were detected and compared with those of emergency varieties Xiangwanxian 13 and Yangdao 6,which had low cadmium accumulation and high cadmium accumulation respectively.The results showed that the cadmium contents of 20 materials were lower than that of Yangdao 6,and 16 materials were lower than that of Xiangwanxian 13.Among them,10 materials such as R1195 were significantly lower than that of Xiangwanxian 13 and 8 materials such as BG130 were most significantly lower than that of Xiangwanxian 13.The low cadmium accumulation male sterile lines W115S and restorer lines R1195 and R1514 were screened out.
基金Supported by Three Major Grain Crop Breeding Projects of the Ministry of Science and Technology(2016YFD0102102)Special Funds for the Construction of National Modern Agricultural Industry Technology System(nycytx-001)+1 种基金Special projects of the Ministry of Agriculture and the Ministry of FinanceScience and Technology Innovation Project of Hunan Academy of Agricultural Sciences(2016)~~
文摘Bangcangjingnuo is a new, mid-maturing conventional Japonica type glutinous rice variety bred by Hunan Rice Research Institute and Hunan Wucai Agricultural Science and Technology Development Co., Ltd. In 2017, the Hunan Crop Variety Examination and Approval Committee approved Bangcangjingnuo. The breeding process of this cultivar was expounded in this study. This cultivar is highly glutinous and waxy, it produces a stable high yield, and it possesses the quality of low temperature resistance. The theoretical yield of Bangcangjingnuo is 8 731.5 kg/hm^2, and the actual output is about 7 422.0 kg/hm^2 according to the 85% discount.Finally, we described the main points of cultivation technique from the perspectives of timely planting and strict seed sterilization.
