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《Journal of Maize Sciences》 2019-03
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Study on Genetic Characteristic of an Inbred Line LY-1 with Multiple Leaves above Ear in Maize

LI Hao-chuan;CUI Li-yang;QU Yan-zhi;MAO Xi-lan;ZHANG Chao-lin;LIU Zong-hua;Agronomy College of Henan Agricultural University/Collaborative Innovation Center of Henan Grain Crops/National Key Laboratory of Wheat and Maize Crop Science;  
An inbred line LY-1 with 7-10 leaves above the ear was developed from an introduced maize hybrid by continuous selfing. In order to study the genetic characteristic of the number of leaves above ear, the line LY-1 as the male was respectively crossed with three different inbred lines L583, LS-1 and Chang7-2 as the females to obtain their progenies and segregation populations. Four traits with leaves above the ear, plant height, ear height and the coefficient of ear height were analyzed. The results showed that the number of leaves above ear in F_1 was between the corresponding parents and close to the high parents, and has no obvious heterosis. It appeared incomplete dominant inheritance for the number of leaves above ear, but the plant height, ear height and coefficient of ear height in F_1 were higher than those of the high parents and existed extremely strong heterosis. The analysis of correlation illustrated that significantly negative relations existed between the number of leaves above ear and coefficient of ear height, but the relations between plant height and the number of leaves above ear, and ear height, between ear height and coefficient of ear height, are highly positive. According to the heritability of each trait, the average heritability of plant height and ear height were higher with over 75%, the following was the coefficient of ear height, but the heritability for the number of leaves above ear was the lowest with only 62.43%. Therefore, leafy inbred lines LY-1 could be used as a resource with multiple leaves above ear to improve germplasms and develop new varieties,and enhance the lodging resistance of plants by reducing the relative ear height in maize.
【Fund】: 国家重点研发计划项目“黄淮海区玉米种质改良及强优势杂交种创制”(2016YFD0101205)
【CateGory Index】: S513
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