| Ear traits evolution in process of Northern maize cultivars substitution and their relationships with yield |
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| DOI：10.7606/j.issn.1000-7601.2011.05.03 |
| Key Words: maize cultivars ear traits evolution law path analysis |
| Author Name | Affiliation | | WANG Xiaodong | Shenyang Agricultural University, Research Institute of Specialty Corn, Shenyang, Liaoning 110866, China | | SHI Zhensheng | Shenyang Agricultural University, Research Institute of Specialty Corn, Shenyang, Liaoning 110866, China | | LI Mingshun | Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | LU Juntian | Shenyang Agricultural University, Research Institute of Specialty Corn, Shenyang, Liaoning 110866, China |
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| Abstract: |
| By the research on ear traits of 4 representative native cultivars and 31 hybrids of North China since the 1950s, the author wanted to reveal panicle traits evolution of different decade cultivars and their relationships with yield. The results showed that: yield per unit area and grain yield per plant greatly increased and ear diameter, ear length, grain depth, grains per spike and kernel weight sh
owed an upward trend with the evolution of cultivars; barren ear tip percentage and seed-producing rate have been never positively modified since the 1980s and showed a downward trend; in the main ear characters of the research, ear diameter made the greatest contribution to grain yield per plant (direct path coefficient DPC=0.4718), followed by ear length (DPC=0.4249) and seed-producing rate (DPC=0.3173); the total effects of ear diameter, ear length and grains per row were the first three. |
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