不同木薯品种（系）农艺性状分析及高产品种（系）筛选

为了解影响木薯产量的主要因素,筛选高产木薯品种（系）,通过主成分分析对10个品种（系）的9个主要农艺性状指标进行量化对比分析。结果表明,10个木薯品种（系）的农艺性状除落叶高度和块根粗无显著差异外（P>0.05）,其余农艺性状间均具有显著差异（P<0.05）,品种（系）SC9、SC124和58-7的农艺性状变异较大,农艺性状中又以单株产量、地上鲜重、鲜薯个数和主茎粗的变异系数最大。鲜薯个数、块根长和块根粗是影响单株产量的关键因子。通过主成分分析提取了2个主成分,累积方差贡献率达88.1%,反映了农艺性状指标的基本信息,其中,鲜薯个数是第1主成分的主导变量,块根长是第2主成分的主导变量。10个木薯品种（系）中,SG-9的综合得分最高,GMT和SC9的产量优势明显,可作为种植推广的品种。

Analysis of Agronomic Characteristics of Different Cassava Varieties (Lines) and Screening of High-Yielding Varieties (Lines)

In order to explore the main factors affecting the yield of cassava, and screen high-yielding cassava varieties (lines), nine main agronomic traits of ten cassava varieties (lines) were compared and analyzed by using principal component analysis. The results showed that the agronomic traits of ten cassava varieties (lines) had significant differences (P < 0.05) except deciduous height and root thick (P > 0.05). The agronomic traits of SC9, SC124 and 58-7 had great variation. Among agronomic traits, the variation coefficients of yield per plant, aboveground fresh weight, number of fresh tubers and stem diameter were the largest. The number of fresh tubers, root length and thick were the key influencing factors of yield per plant. Two principal components were extracted by principal component analysis, and the cumulative variance contribution rate reached 88.1%, which reflected the basic information of agronomic traits. Among them, the number of fresh tubers was the dominant variable of the first principal component, and root length was the dominant variable of the second principal component. Among the ten cassava varieties (lines), SG-9 had the highest comprehensive score, GMT and SC9 had obvious yield advantages and could be used as planting and extension varieties.