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为丰富马铃薯育种资源和选出优质并适宜于天水及周边地区种植的马铃薯新品种,本试验对国际马铃薯中心(CIP)引进的54份茎尖脱毒苗,扩繁生产原原种微型薯,在海拔为1 680 m生态区域进行田间观察鉴定,对其抗病性能(晚疫病、病毒病)、淀粉含量、产量进行比较。结果表明,筛选出9份材料生育期在90~105 d,可用作中早熟及中熟品种选育的亲本;供试材料病毒病病指数在7.8~37.5之间,病毒性退化轻的材料有10份,其退化指数在7.8~20.3之间;晚疫病病指数在7.0~97.8之间,抗晚疫病性能较强的有8份材料,病指数在7.0~29.9之间;19个材料属于大块茎类型,其他的18份材料都属于中小块茎类型,另外15份材料由于薯块小或病害重等原因被淘汰。
In order to enrich potato breeding resources and select new potato varieties which are suitable for planting in Tianshui and the surrounding areas, 54 tips of stem-tip virus-free seedlings introduced by International Potato Center (CIP) Field observation and identification were carried out in the ecological area of 1 680 m above sea level, and the disease resistance (late blight, viral disease), starch content and yield were compared. The results showed that 9 materials were screened from 90 days to 105 days, which could be used as parents for the breeding of middle-early-maturing and middle-maturing varieties. The virus disease index of the tested materials ranged from 7.8 to 37.5. The virus-degraded materials There are 10, the degradation index of 7.8 ~ 20.3; late blight disease index in the 7.0 ~ 97.8 between the late blight resistance performance of 8 materials, the disease index between 7.0 ~ 29.9; 19 materials belong to Tuber type, the other 18 materials belong to the small tuber types, and the other 15 due to small tubercle or disease weight and other reasons be eliminated.