Abstract The goal of this research was to evaluate adventitious rooting capacity and root quality on softwood cuttings of 30 peach rootstock selections potentially tolerant to the Peach Tree Short Life syndrome (PTSL) from 2009/2010 selection cycle. Two trials were conducted with 15 clonal peach (Prunus persica) rootstock selections each, and three reference cultivars: ‘Capdeboscq’, ‘Okinawa’ (P. persica) and ‘Sharpe’ [Chickasaw (P. angustifolia Marsh.) x Prunus spp.]. We concluded that propagation of peach rootstock selections by softwood cuttings is technically feasible, with rooting percentages ranging from 54.17 to 90%. The rootstock selections tested differ for most of analyzed variables, which allow distinguishing superior genotypes, but there is no difference among selections as the percentage of living rooted cuttings. Some selections (DB-SEN-09-23, SS-CHI-09-39 and SS-CHI-09-40) showed root formation and root quality similar to ‘Capdeboscq’, similar (IR-ESM-09-01 and JB-ESM-09-13) to ‘Okinawa’, similar (VEH-GRA-09-57) to both or even better (GL-ERA-09-33) than both reference cultivars. However, the selection FB-ESM-09-44 presented the worst root quality, with zero percentage of suitable rooted cuttings for transplanting.

中文翻译：

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砧木选择和李属的克隆。软木插条栽培品种

摘要 本研究的目的是评估 2009/2010 年选择周期中 30 种可能耐受桃树短寿命综合症 (PTSL) 的桃砧木选择的软木插条的不定生根能力和根质量。使用 15 个无性系桃 (Prunus persica) 砧木选择和三个参考品种进行了两项试验：'Capdeboscq'、'Okinawa' (P. persica) 和 'Sharpe' [Chickasaw (P. angustifolia Marsh.) x Prunus spp。 ]。我们得出的结论是，通过软木插条繁殖桃砧木选择在技术上是可行的，生根率在 54.17% 到 90% 之间。所测试的砧木选择对于大多数分析变量而言不同，这允许区分优良基因型，但选择之间没有差异，如活生根扦插的百分比。一些选择（DB-SEN-09-23、SS-CHI-09-39 和 SS-CHI-09-40）显示根形成和根质量类似于“Capdeboscq”，类似（IR-ESM-09-01 和 JB -ESM-09-13) 到“冲绳”，与两个参考品种相似 (VEH-GRA-09-57) 甚至更好 (GL-ERA-09-33)。然而，选择 FB-ESM-09-44 的根质量最差，适合移植的带根插条的百分比为零。