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首页> 外文期刊>Journal of genetics >Estimation of in situ mating systems in wild sorghum (Sorghum bicolor (L.) Moench) in Ethiopia using SSR-based progeny array data: implications for the spread of crop genes into the wild
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Estimation of in situ mating systems in wild sorghum (Sorghum bicolor (L.) Moench) in Ethiopia using SSR-based progeny array data: implications for the spread of crop genes into the wild

机译：使用基于SSR的后代阵列数据估算埃塞俄比亚野生高粱（Sorghum bicolor（L.）Moench）的原位交配系统：对作物基因向野生环境传播的影响

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Because transgenic sorghum (Sorghum bicolor L.) is being developed for Africa, we investigated the potential for transgenes to spread to conspecific wild/weedy sorghum populations in Ethiopia, which is considered the centre of origin of cultivated sorghum. In the current study, the extent of outcrossing, and uniparental and biparental inbreeding were investigated in seven wild/weedy sorghum populations collected at elevations ranging from 631 to 1709 m. Based on allele frequency data of 1120 progenies and 140 maternal plants from five polymorphic microsatellite markers, outcrossing rates were estimated using standard procedures. The average multilocus outcrossing rate was 0.51, with a range of 0.31a€“0.65 among populations, and the family outcrossing rate was in the extreme range of 0 to 100%. The highest outcrossing ($t_{m} = 0.65$) was recorded in a weedy population that was intermixed with an improved crop variety in Abuare (Wello region). It was also observed that the inbreeding coefficient of the progenies ($F_{ ext{p}}$) tend to be more than the inbreeding coefficient of both their maternal parents ($F_{ ext{m}}$) and the level of inbreeding expected at equilibrium ($F_{ ext{eq}}$), which is a characteristic of predominantly outbreeding species. Biparental inbreeding was evident in all populations and averaged 0.24 (range = 0.10a€“0.33). The high outcrossing rates of wild/weedy sorghum populations in Ethiopia indicate a high potential for crop genes (including transgenes) to spread within the wild pool. Therefore, effective risk management strategies may be needed if the introgression of transgenes or other crop genes from improved cultivars into wild or weedy populations is deemed to be undesirable.
机译：由于非洲正在开发转基因高粱（Sorghum bicolor L.），因此我们研究了转基因传播到埃塞俄比亚同种野生/杂草高粱种群的潜力，埃塞俄比亚被认为是栽培高粱的起源中心。在当前的研究中，调查了海拔631至1709 m的7个野生/杂草高粱种群的异交，单亲和双亲近交的程度。基于来自5个多态性微卫星标记的1120个子代和140个母本植物的等位基因频率数据，使用标准程序估算了异交率。平均多基因座异源杂交率为0.51，在人群中的范围为0.31a±0.65，家庭异源杂交的极端范围为0至100％。在杂草种群中记录了最高的异交率（$ t_ {m} = 0.65 $），该杂草种群与阿布阿雷（韦洛地区）改良作物品种混合在一起。还观察到后代的近交系数（$ F_ {ext {p}} $）往往大于其父母双方的近交系数（$ F_ {ext {m}} $）和近亲繁殖预期处于平衡状态（$ F_ {ext {eq}} $），这是主要近缘种的特征。双亲近交在所有种群中均很明显，平均为0.24（范围= 0.10a±0.33）。埃塞俄比亚野生/杂草高粱种群的高异交率表明，作物基因（包括转基因）在野生种群中传播的可能性很高。因此，如果认为不希望将转基因或其他农作物基因从改良品种渗入野生或杂草种群，则需要有效的风险管理策略。

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