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Reciprocal transplant experiments testing the performance of common and early flowering types of Imperata cylindrica in Japan
Weed Biology and Management ( IF 1.4 ) Pub Date : 2018-12-04 , DOI: 10.1111/wbm.12164
Yasuyuki Nomura 1 , Kentaro Yasuda 2 , Aya Nishiwaki 3 , Tohru Tominaga 1
Affiliation  

We performed reciprocal transplant experiments in Miyazaki, Kyoto, and Akita to differentiate the effects of environmental factors and genetic variations on biomass production and heading time in common (C‐) and early flowering (E‐) types of Imperata cylindrica. In our experiments, we used 10 and 11 accessions of the C‐ and E‐types, respectively, collected across the distribution range of the two types in Japan. Three ramets for each accession were potted in each of the experimental fields and cultivated from June 2016 through November 2017. All accessions were grouped based on their origins: low‐latitude group (LG), mid‐latitude group (MG), and high‐latitude group (HG). The biomasses of the C‐types in the MG were heavier than those of the C‐types in the LG and HG in all experimental fields. E‐type accessions with origins close to the respective experimental fields tended to have higher biomasses than accessions collected further away. C‐type plants grew more vigorously than E‐type plants in Miyazaki and Kyoto, but biomass growth was similar between the types in Akita. Thus, we did not detect clear local adaptation measured as biomass production in the C‐type. However, each accession of the E‐type appeared to be locally adapted. The competitive abilities of the C‐ and E‐type accessions from Tohoku were similar. The flowering periods of the two types did not overlap in any of the experimental fields. Hence, although wild crosses between the two types occur in Tohoku, between‐type hybridization was improbable under the conditions of our common garden experiment.

中文翻译:

双向移植实验,测试日本白茅(Imperata cylindrica)常见和早开花类型的性能

我们在宫崎县,京都市和秋田县进行了互惠移植实验,以区分环境因素和遗传变异对普通(C-)和早开花(E-)凤仙花类型的生物量生产和抽穗时间的影响。在我们的实验中,我们分别使用了10种和11种C型和E型材料,分别在日本的两种分布范围内收集。从2016年6月至2017年11月在每个实验田中分别为每个分株灌入3个分株,并根据其起源将所有分株分组:低纬度组(LG),中纬度组(MG)和高纬度组纬度组(HG)。在所有实验领域中,MG中C型的生物量都比LG和HG中C型的生物量重。起源于各个实验田的E型种质往往比远处收集的种质具有更高的生物量。在宫崎和京都,C型植物的生长速度比E型植物强,但秋田地区的生物量增长却相似。从而,我们没有检测到明显的局部适应性(以C型生物量生产衡量)。但是,每种E型登录似乎都是本地化的。东北的C型和E型种的竞争能力相似。两种类型的开花期在任何实验田中均不重叠。因此,尽管东北地区出现了两种类型之间的野生杂交,但在我们常见的花园实验条件下,类型间杂交是不可能的。
更新日期:2018-12-04
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