摘要
低温冷害是影响棉花生长的主要逆境因子,如何建立简捷、有效的棉花耐冷性鉴定及筛选体系是棉花耐冷研究的关键问题。在本研究中,阐述了如何用O-J-I-P参数来评价棉花幼苗的耐冷性。选用北疆棉区22个主栽棉花品种,对盆栽幼苗经过连续4d的4℃低温处理,进行了相应的冷害指数鉴定,并基于O-J-I-P参数Fv/Fm和PI所建立的冷害因子指数1及冷害因子指数2对各个棉花幼苗做了耐冷鉴定和分级评价。结果发现,冷害因子指数1和冷害因子指数2的鉴定、评价结果与冷害指数鉴定结果相近。中棉所36、新陆早25、297-5幼苗具有较强的耐冷性,而新陆早10号、新陆早12号及炮台1号的耐冷性较弱。叶绿素荧光动力学O-J-I-P可以快速、有效地鉴定棉花幼苗的耐冷性,这对棉花的耐冷性鉴定和培育耐冷型的棉花品种具有重要的意义。
Low temperature and chilling affect cotton developing, to set up a simple and efficient identification and select critiria for cold-tolerance variety is the main breeding aim of cotton. In this paper, the evaluation of the cold-tolerance of cotton seedling by the parameters of chlorophyll a fluoroscence kinetics O-J-I-P was showed. Seedlings of 22 cottons cultivars which fit for planting in Northern Xinjiang area were chilled （4℃） for 4 consecutive days, their chilling index,chilling factor index 1 （CFII） based on O-J-I-P parameter Fv/Fm（the maximum efficiency of photosystem II） and chilling factor index 2（CFI2） based on PI（the performance index） were seperately analyzed. The results showed that the final indentification and evaluation of CFI 1, CFI2 and chilling index were almost indentical. The seedlings of CCRI 36, Xinluzao 25 and 297-5 were cold-tolerant, but seedlings of Xinluzao 10, Xinluzao 12 and Paotai 1 were cold sensitive. O-J-I-P test provides a rapid and efficient method on screening cotton seedlings＇ cold-tolerance, which is helpful for cotton cold-tolerance breeding.
出处
《棉花学报》
CSCD
北大核心
2010年第2期132-137,共6页
Cotton Science
基金
石河子大学棉花育种攻关专项(gxjs2007-yz11)
新疆兵团重大攻关项目(2009GG05)
关键词
低温冷害
棉花
叶绿素荧光
耐冷性
冷害因子指数
low temperature and chilling
cotton
chlorophyll a fluorescence
cold-tolerance
chilling factor index
