抗病高干甘薯地方资源的鉴定评价与育种利用

Evaluation and Breeding potential use of Disease Resistance and High Dry Matter Content in Sweetpotapo Landracs

通过对850份甘薯地方种质资源进行抗病鉴定及品质分析,筛选出高干(干率≥30%)的资源材料71份,高干兼抗3种病害资源材料5份,高干兼抗2种病害资源材料23份,高干并抗1种病害的资源材料42份;通过对1981年以来育成的254个品种的亲本类型分析表明:85.8%的育成品种选用国内育成种(品系)作为亲本,18.5%的品种选用国外引进资源作为亲本,只有8.3%和0.78%的品种分别选用国内甘薯地方种和甘薯野生资源作为亲本。

Identification of disease resistance and quality analysis of 850 sweetpotato landraces were studied. The results showed that 71 accessions with high-dry matter content （dry matter ≥ 30% ）were found. Among them 5 accessions with high-dry matter content were resistant to three diseases,23 accessions were resistant to two diseases, and 42 accessions were resistant to one disease. Analysis of parens types of 254 varieties showed that：85.58% of them used domestic bred varieties as parents, 18.5% involved foreign resources in their pedigrees, and only 8.3% and 0.78% of total varieties used landrace and wild species as parents.