| Changes of seed vigor of maize hybrid at different seed maturity stages during storage period in Hexi seed production area |
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| DOI：10.7606/j.issn.1000-7601.2016.06.11 |
| Key Words: maize hybrid seeds harvesting date seed vigor seed storage seed standard germination |
| Author Name | Affiliation | | WANG Hong-mei | Gansu Agricultural University, Lanzhou, Gansu 730070, China | | FAN Ting-lu | Gansu Agricultural University, Lanzhou, Gansu 730070, China
Dryland Agriculture Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | WANG Shu-ying | Dryland Agriculture Institute, Gansu Academy of Agricultural Sciences, Lanzhou, Gansu 730070, China | | YANG Zhen | Water-Saving Agriculture Institute, Wuwei Academy of Agriculture Sciences, Wuwei, Gansu 733000, China |
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| Abstract: |
| Three hybrid of farming (XY335、ZD958 and JX1) were chosen in this study, maize seeds were obtained at 5 days intervals during grain filling period from 32 to 72 days after pollination to test standard electrical conductivity-EC (three 50-seed samples, 24 hours inhibition at 25℃), germination-SG (7 days at 25℃), and cold test-CT (3 days at 6℃). Field emergency of the maize seeds was tested to analyze the storage characteristics and changes between SG, CT and EC of different harvest periods and different genotypes in the process of storage in May of 2014 and once again in Lab in October of 2014. The results of these experiments show that the degree of decreasing in SG and CT of Maize hybrid seeds with the delay of harvest stored after 10 months reduced and the degree of increasing in EC also reduced but storage characteristics was increasing. The SG respectively declined 6.9%, 4.99% and 4.48% at 32～47, 47～62, and 62～72 DAP (days after pollination), the decreasing rate of 32～47 DAP is 3.75 times of 62～72 DAP. Moreover, CT reduced 9.7%, 13.33% and 10.78% and the degree of decreasing is obviously higher than SG, which shows that low temperature apparently affected storage characteristics. For maize hybrid seeds in different genotypes, SG and CT after 10 months storage differently reduced, XY335 reduced 2%, and 6.8%, JX1 reduced 3.5% and 6.9%, and ZD958 reduced 3.7% and 15%, but the increases of EC are 0.46 μs·cm-1·g-1 in XY335, 0.56 μs·cm-1·g-1 in JX1, and 0.49 μs·cm-1·g-1 in ZD958, respectively. Our results indicated that the degree of recession of ZD958 after 10 months storage is the biggest and the storage characteristics are poorer than those of JX1 and XY335, and XY335 is the last one. In the minimum range of vitality recession, the appropriate harvesting dates are 47～57 DAP of XY335, 52～57 DAP of JX1, and 57～62 DAP of ZD958, respectively, which can provide references for high vigor of seed. |
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