2012, 25(2): 236-240.
Based on pre-census survey, 36 representative walnut seedlings were selected to analyze the top leaf’s five morphological traits and nut’s eight morphological traits. The results showed: (1) In Tibet, the traits of nuts and leaves of walnuts changed in a large range, the ratio of the maximum and minimum values of the traits could be as high as 3.06, showing the leaf traits and nut traits with certain diversity. (2) The variation coefficients of leaf area, suture line height, husk thickness and nut weight were about 20%, the genetic diversity and these traits had greater selectivity in breeding, the variation coefficients of the indexes of leaf shape, nut length, nut height and the indexes of nut shape did not reach 10%, these traits kept stable. (3) There was a significantly positive correlation between leaf area and nut weight and suture line height, the correlation coefficients were 0.505 and 0.440, which noted that the larger the leaf area, the greater the height and the larger the suture, there was a significant positive correlation between leaf width and nut weight, the correlation coefficient was 0.561.
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