Abstract:

In order to select strong cold winter resistance of cytoplasm male sterile lines and maintainers in kenaf, increased its ability to winter cultivation. Cold resistance of 7 group cytoplasm male sterile lines and maintainers in kenaf according to indicators such as wilt degree and rate of survival plant in early spring were identified. The analysis of membership function showed that: (1) the cold resistance of male sterile lines in kenaf was better than its maintainer lines; (2) the order on cold resistance 7 group materials: L23 > 763 > P3 > K03 > 722 > 917 > F3. Analysis of correlation coefficient showed that: (1) there were highly significant positive correlation between average of cold resistance strength △ with leaves number, survived rate of winter, stem water content and soluble protein, proline of leaves, stem soluble protein, proline of leaves showed significantly positive correlation; (2) there were highly significant negative correlation between △ with degree of wilt, leaves conductivity, stem MDA, and stem conductivity showed significantly negative correlation. The different combinations of cytoplasm male sterile lines and maintainers in kenaf, of some differences in cold resistance, its strength showed certain regularity with some of physiological and biochemical indicators.