Relationship between area of ​​three-leaf panicle and crop yield
The high yield of crops is an eternal topic. In rice and maize breeding, the concept of “super rice†and “super corn†was proposed, aiming at a major breakthrough in genetic breeding. In these "supercrop" breeding, the leaf area has been used as an important plant type selection indicator. The leaf area measuring instrument has a leaf area detector and is also portable. It is called a portable leaf area meter. The leaf area has an effect on yield formation. The important role. At present, the total number of leaves of hybrids in maize production is about 20 pieces. Among all the leaves, the photosynthesis of the ear and its upper and lower leaves (commonly called the ear trifoliate) and its contribution to the yield are the greatest. Studies have shown that there is a significant positive correlation between the area of ​​the panicle trifoliate and the yield per plant of maize.
Chen Fanjun et al. found that the three-leaf area of ​​corn was positively correlated with the nitrogen efficiency of maize in the study of maize nitrogen efficiency breeding. It can be used as a secondary indicator of maize nitrogen efficiency screening. Lafitte and Edmeades also came to a similar conclusion. Their results showed that the trifoliate area in the poor soil can also be used as a resistance indicator to increase the nitrogen efficiency of maize. Therefore, studying the genetic mechanism of the three-leaf area of ​​maize ear has important guiding significance for the breeding of high-yield and high-efficiency corn varieties.
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