Acquirement of Chilling Tolerant Mutant by Somatic Screening of Low Temperature in Sea Dallisgrass(Paspalum vaginatum. Sw.)

doi:10.11733/j.issn.1007-0435.2010.01.019

›› 2010, Vol. 18 ›› Issue (1): 97-102.DOI: 10.11733/j.issn.1007-0435.2010.01.019

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Acquirement of Chilling Tolerant Mutant by Somatic Screening of Low Temperature in Sea Dallisgrass(Paspalum vaginatum. Sw.)

YE Xiao-qing¹, SHE Jian-ming¹, LIANG LIU-fang², ZHANG Xu¹, WANG Song-feng¹, DONG Min-qiang², WU Ying-ying²

1. Institute of Agro-biotechnology, Jiangsu Academy of Agricultural Sciences, Nanjing, Jiangsu province 210014, China;
2. Xinchang Baiyun Research and Development Center of Pratacultural Engineering Technology, Xinchang, Zhejiang Province 312500, China

Received:2009-04-08 Revised:2009-12-04 Online:2010-02-15 Published:2010-02-15

海雀稗体细胞低温筛选获得耐寒突变体

叶晓青¹, 佘建明¹, 梁流芳², 张旭¹, 王松凤¹, 董民强², 吴瑛瑛²

1. 江苏省农业科学院农业生物技术研究所, 江苏, 南京, 210014;
2. 新昌白云草业工程技术研发中心, 浙江, 新昌, 312500

作者简介:叶晓青(1965- ),女,安徽巢湖人,硕士,副研究员,主要从事园艺作物生物技术研究,E-mail:yexiaoqing65@163.com
基金资助:
江苏省科技厅科技攻关项目(BE2003369);绍兴市科技局科研项目(2006A32009)资助

Abstract

Abstract: Sea dallisgrass(Paspalum vaginatum Sw.) has been used in warm climatic environment worldwide.The green period of P.vaginatum cv.Adalay is 7-25 d shorter than that of local varieties of Cynodon dactylon(L.) Pars.or Zoysia japonica Steud in Jiangsu and Zhejiang province.The somatic mutant screening technique under low temperature was established in this paper.The pellet calli were induced from immature infloresce of Adalay and then cultured at low temperature of 6℃ and 0℃,respectively.The results show that the shoot regeneration rate was above 80% after cultured 30 d at 6℃ or 0℃ which was a little bit lower than control treatment with culture temperature at 26℃.The shoot regeneration rate was 60% or 50% after cultured 45 d and 33% or 23% after cultured 60 d at 6℃ or 0℃,respectively.After cultured 75 d at 0℃,all the calli lost the capability of plant regeneration.The leaf LT50 of the regenerated plants cultured for 0,30,45,or 60 d at 0℃ was-5.69,-6.07,-6.35 and-6.63℃,respectively.The results of SRAP markers indicate that the specific SRAP markers were associated with the cold tolerance of somatic mutants.The chilling tolerant somatic mutants were acquired from Adalay pellet calli after cultured 45 and 60 d at 0℃.

Key words: Sea dallisgrass(Paspalum vaginatum Sw.), Callus, Somatic mutant, Chilling tolerant, Semilethal temperature

摘要： 旨在细胞水平上建立海雀稗(Paspalum vaginatum Sw.)低温胁迫定向筛选耐寒突变体技术,为开展海雀稗耐寒品种选育提供新途经。于2008年1月以海雀稗Adalay品种(P.vaginatum cv.Adalay)的幼穗诱导产生的颗粒状愈伤组织为材料,分别在6℃和0℃低温条件下进行培养和筛选。试验结果:在6℃和0℃下,培养30 d,愈伤组织的绿苗分化率均在80%以上,比对照处理(培养温度26℃)绿苗分化率略有下降;培养45 d,绿苗分化率分别为60%和50%;培养60 d,绿苗分化率分别降至33%和23%。在0℃下培养75 d,愈伤组织完全丧失分化植株的能力;0℃培养0、30、45和60 d的再生植株叶片的半致死温度分别为:-5.69℃、-6.07℃、-6.35℃和-6.63℃。SRAP分子标记测定结果显示,特异性SRAP标记与海雀稗体细胞突变体的耐寒性相关。海雀稗颗粒状愈伤组织在0℃下培养和筛选45 d和60 d获得了耐寒突变体植株。

关键词: 海雀稗, 愈伤组织, 体细胞突变体:耐寒, 半致死温度

CLC Number:

Q813.1
S812

YE Xiao-qing, SHE Jian-ming, LIANG LIU-fang, ZHANG Xu, WANG Song-feng, DONG Min-qiang, WU Ying-ying. Acquirement of Chilling Tolerant Mutant by Somatic Screening of Low Temperature in Sea Dallisgrass(Paspalum vaginatum. Sw.)[J]. , 2010, 18(1): 97-102.

叶晓青, 佘建明, 梁流芳, 张旭, 王松凤, 董民强, 吴瑛瑛. 海雀稗体细胞低温筛选获得耐寒突变体[J]. , 2010, 18(1): 97-102.

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Acquirement of Chilling Tolerant Mutant by Somatic Screening of Low Temperature in Sea Dallisgrass(Paspalum vaginatum. Sw.)

海雀稗体细胞低温筛选获得耐寒突变体

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