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首页> 外文期刊>Journal of forest research >Realized genetic gain observed in second-generation seedling seed orchards of Acacia mangium in South Kalimantan, Indonesia
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Realized genetic gain observed in second-generation seedling seed orchards of Acacia mangium in South Kalimantan, Indonesia

机译：在印度尼西亚南荷马坦南·卡利马丹的二代幼苗果园中观察到的遗传增益

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摘要

Realized genetic gains brought by the first-generation tree improvement of Acacia mangium were evaluated by analyzing the 1-year growth performance of growth (height, dbh) and form (stem straightness, multi-stem) traits using data collected from three second-generation orchards: groups B, C, and D. Each orchard was composed of improved families derived from open-pollinated seed of plus trees selected from the first-generation seed orchards and newly added unimproved families collected from the same geographic region. The number of improved families and that of the unimproved in each orchard were 31 and 23 for group B, 28 and 39 for group C, and 24 and 30 for group D. Gains were calculated as percentage increase of improved families over unimproved ones. Improved families performed better than unimproved ones in 11 out of 12 comparison cases: four traits each in the three orchards. Averages of the realized genetic gain across the three seedling seed orchards were 3.1%, 5.2%, 4.3%, and 0.5% for height, dbh, stem straightness, and multi-stem, respectively. Except for multi-stem, the performances of improved families were significantly better than those of unimproved families in all the three orchards for dbh and in two out of three orchards for height and stem straightness.
机译：通过分析三秒代收集的数据，通过分析1年生长（高度，DBH）和形式（茎直率，多茎）性状的1年的生长性能来评估由Acacia Mangium的第一代树改善的遗传增益进行评估果园：B，C和D组。每个果园由从第一代种子果园中选择的加上树木的开放授粉种子的改良家庭组成，新添加的未经改善的家族从同一地理区域收集。改善家族的数量和每个果树园内的未改善的组合为31和23组，对于C组，28和39组，D组的24和30组用于D.增益作为未经改善的家族增加的百分比增加。改进的家庭在12个比较案件中的11个中表现优于未经提示的家族：三个果园中的四个特征。对于三个幼苗种子果园的实现遗传增益的平均分别为3.1％，5.2％，4.3％和0.5％，分别为高度，DBH，茎直线和多杆。除了多茎外，改善家族的性能明显优于所有三个果园中的未改善的家族，以及在三个果园中的两个果园的高度和茎直线度。

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