论文部分内容阅读
本文依据玉米育种实践和亲本性状遗传规律的资料,从亲本自交系外部性状与杂种优势的关系上,进一步探讨如何有预见地组配强优势玉米杂交种的问题。研究结果表明,亲本的“株型”、“果穗类型”、“雄穗类型”、“果穗性状”和“抗大、小叶斑病性能”等主要性状,与杂种优势的大小有着一定的联系。根据亲本自交系的上述性状的差异,选择并合理搭配杂交组合,可以大大提高强优势杂交种出现的机率,从而提高了搭配杂交组合的预见性,减少了杂交育种工作中的盲目性。
Based on the data of maize breeding practice and the genetic law of parental traits, the paper discussed the relationship between the external traits and heterosis in parental inbred lines and further explored how to combine the preponderant maize hybrids. The results showed that the main characters “plant type”, “ear type”, “tassel type”, “ear panicle character” and “resistance to large and small leaf spot disease” all had some relations with the size of heterosis. According to the differences of the above-mentioned traits in parental inbred lines, the selection and reasonable collocation of hybridization combinations can greatly increase the chances of emergence of strong dominant hybrids, thereby improving the predictability of hybrid combinations and reducing the blindness in hybrid breeding.