嫁接诱导早熟并保持果树作物的克隆完整性。然而,复杂的砧木×接穗相互作用通常会妨碍理解树的表型是如何形成的,限制选择最佳砧木的潜力。因此,有必要评估(1)幼苗后代如何从精英“加上树木”继承性状变异,(2)这种家族优势是否可以在嫁接到克隆接穗后转移。为了弥合这个差距,我们量化了加性遗传参数(即,狭义遗传力-h2,和遗传估计的育种值-GEBV),\"criollo\",超级食物果树作物鳄梨的“加树”(PerseaamericanaMill。),和他们的开放授粉(OP)半同胞幼苗家族。具体来说,我们使用基因组最佳线性无偏预测(G-BLUP)模型,在104个鳄梨\“criollo\”\“\”的不同组中,将17个形态农艺性状的表型表征与13个高度多态性SSR标记的遗传筛选合并。“估计的加性遗传参数在一项为期5年的普通花园试验中得到了验证(即,来源测试),其中来自82种精英“加树”的22种OP半同胞幼苗作为cv的砧木。克隆人。“criollo”“加树”中的遗传力(h2)得分范围为0.28至0.51。对于带肋叶柄和近端静脉,观察到最高的h2值,分别为0.47(CI95%0.2-0.8)和0.51(CI0.2-0.8),分别。农艺性状的h2得分范围为种子重量的0.34(CI0.2-0.6)至0.39(CI0.2-0.6),水果重量,和总体积,分别。在检查5岁嫁接鳄梨简历的产量变化时。Hass树与精英OP半同胞幼苗砧木,果实的性状总数和果实重量,分别,h2评分分别为0.36(±0.23)和0.11(±0.09)。我们的结果表明,精英“criollo”“加上树木”可以作为鳄梨cv的幼苗砧木的预期供体。哈斯果园由于继承了其突出的性状价值。这加强了通过OP半同胞幼苗砧木家族利用“加树”自然变异的可行性。通过联合估计半同胞家族效应和砧木介导的遗传力,这项研究承诺促进幼苗砧木育种计划,同时更好地辨别嫁接在果树作物中的后果。
Grafting induces precocity and maintains clonal integrity in fruit tree crops. However, the complex rootstock × scion interaction often precludes understanding how the tree phenotype is shaped, limiting the potential to select optimum rootstocks. Therefore, it is necessary to assess (1) how seedling progenies inherit trait variation from elite \'plus trees\', and (2) whether such family superiority may be transferred after grafting to the clonal scion. To bridge this gap, we quantified additive genetic parameters (i.e., narrow sense heritability-h 2, and genetic-estimated breeding values-GEBVs) across landraces, \"criollo\", \"plus trees\" of the super-food fruit tree crop avocado (Persea americana Mill.), and their open-pollinated (OP) half-sib seedling families. Specifically, we used a genomic best linear unbiased prediction (G-BLUP) model to merge phenotypic characterization of 17 morpho-agronomic traits with genetic screening of 13 highly polymorphic SSR markers in a diverse panel of 104 avocado \"criollo\" \"plus trees.\" Estimated additive genetic parameters were validated at a 5-year-old common garden trial (i.e., provenance test), in which 22 OP half-sib seedlings from 82 elite \"plus trees\" served as rootstocks for the cv. Hass clone. Heritability (h 2) scores in the \"criollo\" \"plus trees\" ranged from 0.28 to 0.51. The highest h 2 values were observed for ribbed petiole and adaxial veins with 0.47 (CI 95%0.2-0.8) and 0.51 (CI 0.2-0.8), respectively. The h 2 scores for the agronomic traits ranged from 0.34 (CI 0.2-0.6) to 0.39 (CI 0.2-0.6) for seed weight, fruit weight, and total volume, respectively. When inspecting yield variation across 5-year-old grafted avocado cv. Hass trees with elite OP half-sib seedling rootstocks, the traits total number of fruits and fruits\' weight, respectively, exhibited h 2 scores of 0.36 (± 0.23) and 0.11 (± 0.09). Our results indicate that elite \"criollo\" \"plus trees\" may serve as promissory donors of seedling rootstocks for avocado cv. Hass orchards due to the inheritance of their outstanding trait values. This reinforces the feasibility to leverage natural variation from \"plus trees\" via OP half-sib seedling rootstock families. By jointly estimating half-sib family effects and rootstock-mediated heritability, this study promises boosting seedling rootstock breeding programs, while better discerning the consequences of grafting in fruit tree crops.