综合秋季休眠和春季返青时的表现,评估 Stenotaphrum Trin 植物的耐寒能力

IF 3.1 3区 农林科学 Q1 HORTICULTURE
Jia Qu, Dong-Li Hao, Jin-Yan Zhou, Jing-Bo Chen, Dao-Jin Sun, Jian-Xiu Liu, Jun-Qin Zong, Zhi-Yong Wang
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引用次数: 0

摘要

由于Stenotaphrum Trin的耐寒性较差,而华东温带地区又急需耐荫草种,本研究对55个Stenotaphrum登录品系的耐寒性进行了评价,旨在为温带地区提供耐荫材料。优良的耐寒草坪草应同时具有秋季休眠延迟和春季返青早的优点。然而,以往对草坪草抗寒性的研究主要集中在春季返青的表现上,对秋季休眠的关注较少,影响了草坪草的观赏和应用价值。本研究首先动态调查了各品种在秋季休眠期的叶色和春季返青期的覆盖度,并通过成员函数和聚类分析评估了各品种的抗寒性。将育种品系分为四类后,发现其抗寒性存在显著差异。秋季休眠期叶色与春季返青期覆盖度之间的相关性较弱(R2 = 0.1682),这表明用单一时期的表现来代表品种的抗寒性并不合适。为了检验基于实验室的 LT50 和匍匐茎再生等级分析是否能取代上述改进方法,我们进行了相关分析,发现这两种方法的拟合度非常差。造成这种现象的原因是基于实验室的参数与盆栽调查数据之间的相关性较差。因此,本研究提出了一种综合秋季休眠期和春季返青期表现的石蒜抗寒性评价方法。这种改进后的评价方法不能简化为单一时期的生长表现,也不能用基于实验室的 LT50 和匍匐茎再生试验来替代。在这一改进方法的帮助下,为华东温带地区确定了几个优秀的耐寒品种(ST003、S13 和 S12)。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Evaluating the Cold Tolerance of Stenotaphrum Trin Plants by Integrating Their Performance at Both Fall Dormancy and Spring Green-Up
Owing to the poor cold tolerance of Stenotaphrum Trin and the urgent need for shade-tolerant grass species in temperate regions of East China, this study evaluated the cold tolerance of 55 Stenotaphrum accessions, aiming to provide shade-tolerant materials for temperate regions. A fine cold-tolerant turfgrass should have both the advantages of delayed fall dormancy and early spring green-up. However, previous research on the cold resistance of turfgrass has mainly focused on the performance of the spring green-up, with less attention paid to the fall dormancy, which has affected the ornamental and application value of turfgrass. This study first dynamically investigated the leaf colour of each accession during the fall dormancy and the coverage during the spring green-up and evaluated the cold resistance of the accession through membership functions and cluster analysis. Significant differences in the cold resistance were found with the assignment of breeding lines to four categories. The weak correlation (R2 = 0.1682) between leaf colour during the fall dormancy and coverage during the spring green-up indicates that using the performance of a single period to represent the cold resistance of accessions is not appropriate. To test whether using the laboratory-based LT50 and stolon regrowth rating analysis can replace the above-improved method, we conducted a related analysis and found that the fit between these two methods is very poor. This phenomenon is attributed to the poor correlation between the laboratory-based parameters and the pot-investigated data. Therefore, this study presents a cold resistance evaluation method for Stenotaphrum that integrates performance in both the fall dormancy and spring green-up periods. This improved evaluation method cannot be simplified by the growth performance of a single period or replaced by using laboratory-based LT50 and stolon regrowth tests. With the help of this improved method, several excellent cold tolerance accessions (ST003, S13, and S12) were identified for temperate regions of East China.
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来源期刊
Horticulturae
Horticulturae HORTICULTURE-
CiteScore
3.50
自引率
19.40%
发文量
998
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