A Study on Characteristics of Zoysia japonica Mutations Induced by 60Co-γ Irradiation

doi:10.11733/j.issn.1007-0435.2015.03.019

Acta Agrestia Sinica ›› 2015, Vol. 23 ›› Issue (3): 564-570.DOI: 10.11733/j.issn.1007-0435.2015.03.019

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A Study on Characteristics of Zoysia japonica Mutations Induced by ⁶⁰Co-γ Irradiation

XIE Xin-chun, CAO Rong-xiang, LI Li-tao, ZHANG Ju-ming

College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, Guangdong Province 510642, China

Received:2014-06-16 Revised:2014-09-22 Online:2015-06-15 Published:2015-07-02

⁶⁰Co-γ射线诱导结缕草性状变异的研究

谢新春, 曹荣祥, 李丽涛, 张巨明

华南农业大学林学与风景园林学院, 广东广州 510642

通讯作者: 张巨明
作者简介:谢新春(1989-),男,安徽黄山人,硕士研究生,主要从事草坪与景观环境研究,E-mail:1164263831@qq.com
基金资助:
广东省科技计划项目(2012B020302002)资助

Abstract

Abstract:

Zoysiagrass is one of important turfgrass germplasm resourses in China. Howerver there is an extreme shortage of new zoysiagrass cultivars across the country. The sprigs of Zoysia japonica ‘Lanyin No.3’ were treated using the ⁶⁰Co-γ irradiation of five doses to determine the optimal mutagenic dose by the analyses of sprig survival rate of each radiation dose. Expected mutant traits including leaf width, plant height, stolon internode length and diameter as well as turf qualities, such as density, coverage, colour, uniformity, green period, and overall quality were measured. The results indicated that the survival rates of zoysiagrass ‘Lanyin No.3’ decreased with the increase of irradiation dose, the suitable irradiation dose was 53 Gy. The leaf breadth, plant height, stolon internode length and diameter of mutant “80-1” were significantly lower than that of control,while turf density was significantly higher than that of control; Mutant “110-1” had strong overwintering ability with up to 315 days of green period, 13 days longer than the control. Comprehensive analyses indicated that the turf qualities of mutants “80-1” and “110-1” were improved and both mutants had better characteristics.

Key words: Zoysia japonica ‘Lanyin No.3’, ⁶⁰Co-&gamma, irradiation, Mutants

摘要：

结缕草是我国重要的草坪草种质资源,但我国十分缺乏结缕草新品种。辐射诱变是草坪草育种的重要手段。研究以兰引3号结缕草(Zoysia japonica‘Lanyin No.3’)匍匐茎为试验材料,通过设置⁶⁰Co-γ射线20,50,80,110和0 Gy(CK) 5个剂量对其进行辐射处理,分析各辐射剂量下的成活率,确定适合兰引3号结缕草变异的辐射诱变剂量;通过测定各疑似突变株性状的叶宽、株高、匍匐茎节间直径和节间长度,以及坪用性状密度、盖度、色泽、均一性、绿期、综合质量,确定性状优良突变体。结果表明,兰引3号结缕草成活率随着辐照剂量的增加而显著降低,其适宜辐射诱变剂量约为53 Gy。突变株“80-1”叶宽、株高、匍匐茎节间直径和节间长度都显著低于对照,而密度则显著高于对照;突变株“110-1”越冬能力强,绿期长达315 d,比对照延长了13 d。综合分析,突变株“80-1”和“110-1”产生了良性突变,坪用性状得到改善。

关键词: 兰引3号结缕草, ⁶⁰Co-&gamma, 射线, 突变体

CLC Number:

S688.4

XIE Xin-chun, CAO Rong-xiang, LI Li-tao, ZHANG Ju-ming. A Study on Characteristics of Zoysia japonica Mutations Induced by ⁶⁰Co-γ Irradiation[J]. Acta Agrestia Sinica, 2015, 23(3): 564-570.

谢新春, 曹荣祥, 李丽涛, 张巨明. ⁶⁰Co-γ射线诱导结缕草性状变异的研究[J]. 草地学报, 2015, 23(3): 564-570.

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A Study on Characteristics of Zoysia japonica Mutations Induced by ⁶⁰Co-γ Irradiation

⁶⁰Co-γ射线诱导结缕草性状变异的研究

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