鸭茅DUS测试不同品种性状一致性分析

doi:10.11686/cyxb2015513

摘要/Abstract

摘要： 鸭茅是世界著名的优质多年生牧草,为优化鸭茅DUS测试指南,制定符合我国国情的鸭茅DUS测试标准,根据UPOV鸭茅DUS测试指南相关内容,选取30个性状,对9个鸭茅品种(系) 连续两年DUS测试结果一致性进行了分析,结果表明除花序主轴基部分枝数外,其余6个质量性状一致性好;7个假质量性状在两个独立生长周期内,观测结果保持基本一致;在2年生长周期内3个数量性状:株高,倒二叶长,鲜重在9个品种(系)上差异均达到极显著水平(P<0.01),不同品种(系)在不同的数量性状上存在不同的差异,数量性状受环境影响大,数量性状的平均变异系数变幅26.3%(‘01472’,2013年)~48.2%(‘瓦纳’,2014年)。总体来说质量性状和假质量性状的一致性要高于数量性状。‘宝兴’、‘古蔺’、‘楷模’3个国审鸭茅品种年际间性状相对稳定,且稳定的数量性状较多,综合考虑可以把它们用作测试标准品种。

Abstract: Orchardgrass (Dactylis glomerata) is a globally important perennial forage grass. The objectives of this study were to optimize the guidelines and formulate the standards for distinctness, uniformity and stability (DUS) tests of orchardgrass to fit Chinese conditions. Thirty DUS characters from 9 varieties were utilized for DUS testing over two consecutive years. The results indicated that quality characteristics were consistent over both years apart from spindle base branch number. The expression of 7 pseudo-qualitative characteristics was also consistent. There were significant differences (P<0.01) among quantity characteristics especially plant height, second leaf ligule width and green yield. The qualitative characteristics were affected by environment; the mean coefficient of variation for qualitative characteristics ranged from 26.3% (‘Grasslands Wana’, 2013) to 48.2% (‘01472’, 2014). The uniformity of quality characteristics and pseudo-qualitative characteristics is higher than the uniformity of quantity characteristics. In general, ‘Baoxing’, ‘Gulin’ and ‘Cambria’ could be used as example varieties because of their lower coefficient of variation and more stable qualitative characteristics.

王新宇, 蒋林峰, 张新全, 黄琳凯, 李宁, 王鹏喜. 鸭茅DUS测试不同品种性状一致性分析[J]. 草业学报, 2016, 25(9): 104-116.

WANG Xin-Yu, JIANG Lin-Feng, ZHANG Xin-Quan, HUANG Lin-Kai, LI Ning, WANG Peng-Xi. Uniformity analysis of DUS traits of different orchardgrass (Dactylis glomerata) varieties[J]. Acta Prataculturae Sinica, 2016, 25(9): 104-116.

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