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首页> 外文期刊>Seed Science and Technology >Frequent individual counts of radicle emergence and mean just germination time predict seed vigour of Avena sativa and Elymus nutans
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Frequent individual counts of radicle emergence and mean just germination time predict seed vigour of Avena sativa and Elymus nutans

机译：胚根出苗的频繁个体计数和平均发芽时间可预测燕麦属和披碱草的种子活力

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摘要

Single early counts of radicle emergence (RE) and mean just germination time (MJGT) have been used to estimate seed vigour for several vegetable and crop species. The objectives of this study were to test the suitability of these two methods for determining seed vigour of two important forage grass species, Avena sativa and Elymus nutans. Fifteen seed lots each of A. sativa (standard germination (SG) ranged from 80 to 93%) and E. nutans (SG from 70 to 84%) were used to determine MJGT and RE in the laboratory. Field emergence (FE) and mean field emergence time (MET) were evaluated at two sowing dates in April and May 2014. SG was not significantly correlated with FE at either of the two sowing dates. However, for both species, MJGT was significantly positively correlated with both MET and FE. Thus seed lots with rapid germination (low MJGT) also emerged rapidly (low MET) and to a higher value than lots that germinated slowly (high MJGT). A single count of radicle emergence (RE) taken after 52 hours at 20 degrees C for A. sativa and 76 hours at 25 degrees C for E. nutans was predictive of MJGT (R-2 = 0.94 and 0.62, respectively) and of field emergence at both sowings for both species (R-2 = 0.62 at sowing 1 and 0.63 at sowing 2 for A. sativa; 0.67 at sowing 1 and 0.64 at sowing 2 for E. nutans). RE was also correlated with MET in E. nutans, but not A. sativa where there were only small differences in MET. We suggest RE and MJGT are both suitable indices for assessing field emergence and hence seed vigour of the two forage species.
机译：单个的胚根出现早期计数（RE）和平均发芽时间（MJGT）已用于估计几种蔬菜和农作物物种的种子活力。这项研究的目的是测试这两种方法对确定两种重要牧草种类（燕麦燕麦和披碱草）种子活力的适用性。在实验室中，每株十五个种子种子（标准发芽率（SG）从80％到93％）和大肠埃希菌（SG值从70％到84％）用于测定MJGT和RE。在2014年4月和2014年5月的两个播种期评估田间出苗率（FE）和平均田间出苗时间（MET）。在两个播种日期中，SG与FE均无显着相关性。但是，对于这两个物种，MJGT与MET和FE均呈显着正相关。因此，发芽较快的种子（MJGT较低）也较快发芽（MET较低），并且比发芽缓慢的种子（较高MJGT）具有更高的价值。在20摄氏度下对A. sativa进行52小时后和在25摄氏度对E. nutans进行76小时后进行的一次胚根出现（RE）计数可预测MJGT（R-2分别为0.94和0.62）和视野两种植物在两个播种时均出苗（A. sativa在播种1时R-2 = 0.62，在播种2时R. = 0.63;在E.nutans播种1中R. = 0.67，在播种2中0.64）。 RE也与大肠埃希菌中的MET相关，但与A. sativa无关，因为MET中只有很小的差异。我们建议RE和MJGT都是评估田间种子出苗率以及两种草料种子活力的合适指标。

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