Abstract
In order to clarify the relationship of leaf characteristics and growth of <em>Catalpa bungei</em> and provide a theoretical basis for clone selection in <em>Catalpa bungei</em>, the growth and leaf morphology characteristics of 61 <em>Catalpa bungei</em> clones were studied. The results showed that significant variances were found in leaf length, width, width/length, leaf stalk length, specific leaf mass, Diameter at Breast Height (DBH) and height among 61 clones. Leaf length, width and leaf stalk length were positively correlated with each other. Leaf length and leaf stalk length were positively related to DBH and height and leaf width was positively related to height. This suggests that leaf morphological indices, such as leaf length, leaf stalk length and leaf width, can predict the tree growth for <em>Catalpa bungei</em> clones, which would be helpful for clonal selection in future.
Highlights
Catalpa bungei, belonging to the family bignoniaceae, genus catalpa is usually known as “the king of trees”, with valuable timber and famous ornamental tree species endemic to China (Pan et al, 1991; Tang et al, 2007)
Catalpa bungei is widely distributed in China due to its strong adaptability such as high survive rate and fast growth rate
Leaf traits play a significant role in genetic improvement and strategy-making (Fernanda et al, 2002)
Summary
Catalpa bungei, belonging to the family bignoniaceae, genus catalpa is usually known as “the king of trees”, with valuable timber and famous ornamental tree species endemic to China (Pan et al, 1991; Tang et al, 2007). Catalpa bungei is widely distributed in China due to its strong adaptability such as high survive rate and fast growth rate. Understanding variation of leaf traits for different clones may provide the basis for breeding and selection. The overall objective of this research is to 1) figure out the relationship of leaf characteristics and growth of Catalpa bungei, 2) provide a theoretical basis for clone choice in Catalpa bungei
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