甜玉米种子活力及其杂种优势初步研究

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。...

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Bibliographic Details
Published in广东农业科学 Vol. 42; no. 13; pp. 37 - 41
Main Author 毛笈华 文天祥 于永涛 李春艳 祁喜涛 高磊 胡建广
Format Journal Article
LanguageChinese
Published 广东省农科院作物研究所/广东省农作物遗传改良重点实验室,广东广州,510640 2015
Subjects
杂种优势
甜玉米
种子活力
甜玉米
种子活力
杂种优势
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ISSN1004-874X

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Summary: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。
Bibliography:44-1267/S
MAO Ji-hua, WEN Tian-xiang, YU Yong-tao, LI Chun-yan, QI Xi-tao, GAO Lei, HU Jian-guang （Crops Research Institute, Guangdong Academy of Agricultural Sciences/Guangdong Provincial Key Laboratory of Crops Genetics and Improvement, Guangzhou 510640, China）
sweet corn; seed vigor; heterosis
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 lO0-seed weight. The lO0-seed weight of F1 seeds showed negative heterosis and sign
ISSN:1004-874X