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ADVANCES IN RESEARCH ON WHEAT BREEDING FOR SCAB RESISTANCE IN CHINA

机译:我国沙坡抵抗力育种研究进展

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Wheat scab is a serious disease in South China, especially in the mid-lower reaches of the Yangtze Fiver. This paper highlights some of the significant progress made on screening resistant germplasm, inheritance of resistance, relationships between resistance and agronomic traits, and breeding for wheat cultivars with resistance to scab in China. Although no immune materials are found in wheat and its relatives, the response to scab among varieties is significantly different. Some of the old, indigenous varieties, such as Wangshuibai and Jianzimai and improved varieties, such as Sumai 3 and Ning 7840, have high and stable resistance to scab, being the best sources of resistance worldwide. Scab resistance is quantitatively inherited and mainly controlled by additive genetic effects. Among resistant cultivars, both the number and chromosomal location of genes are different, which indicates that the diverse resistant genes can be recombined by intervarietal cross. We found no genotypic correlations between scab resistance and undesirable agronomic traits. Developing resistant cultivars by various breeding methods is possible. However, it will be the most effective to use multi-parent, convergent crosses and recurrent selection, because these methods can integrate scab resistance with high yield potential and better quality through the accumulation of diverse resistance genes. The development of the new breeding methods, especially biotechnology, will help to further raise the efficiency of breeding for scab resistance.
机译:小麦SCAB是华南地区的严重疾病,特别是在长江纤维中下游。本文突出了筛选种质,抵抗性质,抵抗力,抵抗与农艺性状的关系的一些重要进展,以及中国耐抗结痂的小麦品种育种。虽然小麦及其亲属没有发现免疫材料,但对品种之间的结痂的反应显着不同。王石翼和剑达莱等一些旧的土着品种和改善品种,如苏凯3和宁7840,对SCAB的抗性高且稳定,是全球最佳的抵抗源。结痂抗性是定量遗传的,主要由添加剂遗传效应控制。在耐药品种中,基因的数量和染色体位置都不同,这表明各种抗性基因可以通过跨越交叉来重新组合。我们发现结痂抗性与不良农艺性状之间没有基因型相关性。通过各种育种方法产生抗性品种。然而,使用多父母,收敛交叉和复发选择是最有效的,因为这些方法可以通过多种抗性基因的积累来整合Chab电阻和更好的质量。新的育种方法,尤其是生物技术的发展将有助于进一步提高育种抗性育种的效率。

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