Phenotyping of Eggplant Wild Relatives and Interspecific Hybrids with Conventional and Phenomics Descriptors Provides Insight for Their Potential Utilization in Breeding.
Phenotyping of Eggplant Wild Relatives and Interspecific Hybrids with Conventional and Phenomics Descriptors Provides Insight for Their Potential Utilization in Breeding.
复制标题
具有常规和现象描述符的茄子野生亲戚和种间杂种的表型为其在繁殖中的潜在利用提供了见解。
DOI：
10.3389/fpls.2016.00677
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发表时间：
2016
影响因子：
5.6
通讯作者：
Plazas M
中科院分区：
文献类型：
--
作者：
Kaushik P;Prohens J;Vilanova S;Gramazio P;Plazas M
茄子（Solanum melongena）与大量野生物种有关，这些野生物种是育种计划的变异来源，特别是与适应气候变化有关的性状。然而，野生物种在很大程度上仍未被开发用于茄子育种。详细的野生种及其与茄子的杂交种的表型特征可以识别有前途的野生种和相关性状的遗传控制和杂种优势的信息。对6份茄子材料、12个野生种的21份材料（主要基因库种S. insanum和11个次级基因库种）和45个茄子与野生种的种间杂种（18个与S. insanum和27与次级genepool物种）使用27个常规形态描述符和20个果实形态测量描述符获得的表型组学工具番茄分析仪。栽培，野生和种间杂交组之间观察到显着差异的18个常规和18个番茄分析仪的描述符，杂交种一般具有中间值。野生种一般比栽培品种和种间杂种显示中间的变异范围和变异系数（CV）值，除了果形性状，后者是最可变的。多变量主成分分析（PCA）揭示了一个明确的分离的野生种和栽培品种。种间杂种S. insanum与栽培茄子的亲缘关系更近，而具有次级基因库物种的杂交种通常与野生物种聚在一起。在野生物种中观察到许多农艺性状的差异，这使得确定茄子育种的最大潜在利益的物种。杂种优势值为积极的大多数与活力相关的性状，而果实大小的价值接近于零，与S。incanum并且对于与二级基因库物种的杂交种呈高度阴性。我们的研究结果允许潜在的有趣的野生种和种间杂交种在茄子渐渗育种的鉴定。这是扩大茄子遗传基础和培育这种作物适应气候变化的重要一步。
Eggplant (Solanum melongena) is related to a large number of wild species that are a source of variation for breeding programmes, in particular for traits related to adaptation to climate change. However, wild species remain largely unexploited for eggplant breeding. Detailed phenotypic characterization of wild species and their hybrids with eggplant may allow identifying promising wild species and information on the genetic control and heterosis of relevant traits. We characterizated six eggplant accessions, 21 accessions of 12 wild species (the only primary genepool species S. insanum and 11 secondary genepool species) and 45 interspecific hybrids of eggplant with wild species (18 with S. insanum and 27 with secondary genepool species) using 27 conventional morphological descriptors and 20 fruit morphometric descriptors obtained with the phenomics tool Tomato Analyzer. Significant differences were observed among cultivated, wild and interspecific hybrid groups for 18 conventional and 18 Tomato Analyzer descriptors, with hybrids generally having intermediate values. Wild species were generally more variable than cultivated accessions and interspecific hybrids displayed intermediate ranges of variation and coefficient of variation (CV) values, except for fruit shape traits in which the latter were the most variable. The multivariate principal components analysis (PCA) reveals a clear separation of wild species and cultivated accessions. Interspecific hybrids with S. insanum plotted closer to cultivated eggplant, while hybrids with secondary genepool species generally clustered together with wild species. Many differences were observed among wild species for traits of agronomic interest, which allowed identifying species of greatest potential interest for eggplant breeding. Heterosis values were positive for most vigor-related traits, while for fruit size values were close to zero for hybrids with S. incanum and highly negative for hybrids with secondary genepool species. Our results allowed the identification of potentially interesting wild species and interspecific hybrids for introgression breeding in eggplant. This is an important step for broadening the genetic base of eggplant and for breeding for adaptation to climate change in this crop.