| 孙小妹,陈菁菁,陈年来.基于GGE双标图法的西瓜抗旱性鉴定评价方法[J].干旱地区农业研究,2017,35(1):233~239 |
| 基于GGE双标图法的西瓜抗旱性鉴定评价方法 |
| Evaluation methods on watermelon drought resistance on the basis of GGE biplot |
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| DOI：10.7606/j.issn.1000-7601.2017.01.35 |
| 中文关键词: 西瓜 抗旱性 GGE-bioplot 评价方法 |
| 英文关键词:watermelon drought resistance GGE-bioplot evaluation method |
| 基金项目:甘肃省干旱生境作物学重点实验室开放基金资助(GSCS-2010-06) |
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| 中文摘要: |
| 以7个已知抗旱性的西瓜品种为试材，大田条件下测定其在正常供水、轻度和中度水分胁迫下的经济产量及产量构成性状。选用7种评价方法对试材的经济产量进行评价比较，利用GGE-bioplot双标图分析系统，筛选西瓜抗旱性评价的适宜方法。结果表明：随水分胁迫加剧，供试西瓜材料的产量逐渐降低，降幅具有明显的品种间差异；抗旱品种为了实现最大可能性的产量产出，单果重与单株坐果数间存在权衡效应，而干旱敏感性品种的单果重与单株坐果数间并无权衡关系，果型大小比较不稳定，且单株坐果数变幅较大，不能够保障产量丰收；在GGE-bioplot分析系统中利用折合公顷产量分析试材间抗旱性的相似性，所得结果与已知品种抗旱性强弱规律一致；以折合公顷产量为基准，试材和评价方法位于GGE-bioplot双标图不同的扇区内，与已知抗旱性强的试材位于同一扇区的评价方法即为筛选出适宜的评价方法；在轻度和中度水分胁迫下
，筛选出YSI(抗旱系数)、DRI(抗旱指数)、MP(平均产量)、STI(耐旱指数)与GMP(几何平均产量)为西瓜抗旱性评价的适宜方法，其中MP、STI与GMP属同一类评价方法，YSI与DRI属同一类。本研究结果对西瓜抗旱资源筛选和新品种抗旱性鉴定具有理论指导意义。 |
| 英文摘要: |
| A field investigation with seven watermelon genotypes was conducted under three soil moisture levels, and the yield and its components were determined. The yield drought-resistance coefficients were calculated using seven evaluation methods. On the basis of principal component analysis and the correlations among the drought-resistance evaluation methods, the identification indexes were analyzed by GGE-bioplot. The results showed that the fruit yield was decreased as soil moisture became reduced, and the extents varied within genotypes. Clear traits trade-off was found between fruit weight and fruit number per plant in varieties with higher drought resistance. For example, genotypes 238 and Xinongbahao with high fruit number per plant will have low fruit weight. However, traits trade-off was not found in drought sensitive genotypes. The results obtained from genotype comparisons using yield based GGE-bioplot were similar to the known drought-resistant abilities of the genotypes. Based on the yield, YSI (yield stability index), DRI (drought resistant index), MP (mean productivity), STI (stress tolerance index) and GMP (geometric mean productivity) were selected as the suitable drought evaluation indexes under water stress after GGE-biopolt analysis. MP, STI and GMP belonged to the same category, and YSI and DRI were in the other category. The results imply an important theoretical significance in guiding the screening of drought resistant watermelon germplasms and the identification of drought resistance of watermelon cultivars. |
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