| 毛笈华，文天祥，于永涛，等.甜玉米种子活力及其杂种优势初步研究[J].广东农业科学,2015,42(13):37-41 |
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甜玉米种子活力及其杂种优势初步研究 |
| Study on seed vigor of sweet corn and its heretosis |
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| DOI： |
| 中文关键词: 甜玉米 种子活力 杂种优势 |
| 英文关键词: sweet corn seed vigor heterosis |
| 基金项目: |
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| 摘要点击次数: 1780 |
| 全文下载次数: 785 |
| 中文摘要: |
| ：以6 个甜玉米自交系及其杂交F1 后代为材料，分析了甜玉米种子发育过程中种子活力变化、活力指
标间的相关性及其杂种优势。结果表明：甜玉米种子活力随种子成熟度的增加而增加，不同杂交组合的最佳采收
时间不同；不同基因型种子的百粒重、发芽势、发芽率、苗鲜重、活力指数存在显著差异，活力指数与发芽势、发
芽率显著相关，与百粒重相关性较小；F1 种子的百粒重呈现负向杂种优势且与母本显著正相关，可通过选用百粒
重大的母本增加杂交F1 种子的百粒重，而活力指数有较大的正向中亲优势且受低值亲本影响显著，应避免使用活
力指数过低的亲本。 |
| 英文摘要: |
| The heterosis of seed vigor，the relationships among seed vigor characters，and the changes of seed
vigor in F1 during seed development stage were analyzed with six sweet corn inbred lines and their F1 hybrids. The
results indicated that seed vigor increased along with seed development and the optimum harvest date was influenced by
genotype. The 100-seed weight，germination rate，germination potential，fresh weight of seedlings and vigor index showed
significant differences among different genotypes. Vigor index showed significantly positive correlations with germination
rate and germination potential，and no significant correlation with 100-seed weight. The 100-seed weight of F1 seeds
showed negative heterosis and significantly positive correlation with female parent，while the vigor index had positive
heterosis and affected by low-vigor parent significantly. It was suggested that 100-seed weight and seed vigor of F1 seeds
could be improved by applying female parent with high 100-seed weight and avoiding using low vigor parent. |
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