Controlled pollination (CP) was used to produce four reciprocal crosses of the interspecific hybrid between Acacia auriculiformis and A. mangium, and one additional reciprocal cross within each parental species. There were no reciprocal effects on seed yield index (filled seeds per 100 flowers pollinated) and germination success for filled seeds. The CP families, together with four additional CP hybrid families, one open-pollinated (OP) family from seed orchards of each parental species and a commercial Acacia hybrid (A. mangium × A. auriculiformis) clone were planted in a field trial in central Vietnam. Forty months after planting the pure-species A. mangium families, with diameter at breast height (DBH), averaging 10.8 cm, grew faster than those of A. auriculiformis (mean 8.5 cm). Nursery gate survival and mean height and diameter at breast height at 40 months of the interspecific hybrid families were not affected by crossing direction. The mean height and DBH of all hybrid families was close to the mid-point of the two parental species. Inheritance of phyllode length and breadth was non-additive; interspecific hybrid families had phyllode length and width much closer to that of A. auriculiformis than to A. mangium, however there was no consistent reciprocal effect for these traits. It is concluded that, at least for the test environment under study, crossing direction is not likely to be of practical importance in hybrid breeding of these species.

中文翻译：

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母本和互惠作用在培育 Acacia auriculiformis 和 A. mangium 之间的种间杂交中很重要吗？

受控授粉 (CP) 用于产生 Acacia auriculiformis 和 A. mangium 之间的种间杂种的四个互惠杂交，以及每个亲本物种内的一个额外互惠杂交。对种子产量指数（每 100 朵花授粉的饱满种子）和饱满种子的发芽成功率没有相互影响。在中部地区的田间试验中种植了 CP 家族以及四个额外的 CP 杂种家族、一个来自每个亲本物种种子园的开放授粉 (OP) 家族和一个商业相思杂种 (A. mangium × A. auriculiformis)越南。种植纯种 A. mangium 科 40 个月后，胸高直径 (DBH) 平均为 10.8 厘米，比 Auriculiformis 的生长速度更快（平均 8.5 厘米）。种间杂交家族在 40 个月时的苗圃门存活率和平均高度和胸高直径不受交叉方向的影响。所有杂种科的平均身高和胸径均接近两个亲本种的中点。叶状体长度和宽度的继承是非可加性的；种间杂种家族的叶状体长度和宽度更接近 A. auriculiformis 而不是 A. mangium，但是这些性状没有一致的相互影响。结论是，至少对于所研究的测试环境，交叉方向在这些物种的杂交育种中不太可能具有实际重要性。所有杂种科的平均身高和胸径均接近两个亲本种的中点。叶状体长度和宽度的继承是非可加性的；种间杂种家族的叶状体长度和宽度更接近 A. auriculiformis 而不是 A. mangium，但是这些性状没有一致的相互影响。结论是，至少对于所研究的测试环境，交叉方向在这些物种的杂交育种中不太可能具有实际重要性。所有杂种科的平均身高和胸径均接近两个亲本种的中点。叶状体长度和宽度的继承是非可加性的；种间杂种家族的叶状体长度和宽度更接近 A. auriculiformis 而不是 A. mangium，但是这些性状没有一致的相互影响。结论是，至少对于所研究的测试环境，交叉方向在这些物种的杂交育种中不太可能具有实际重要性。