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津巴布韦烤烟杂交种的利用与启示

Utilization and insights on flue-cured tobacco hybrids in Zimbabwe

  • 摘要: 为了解津巴布韦烤烟杂交种利用状况,学习其经验,提高我国烤烟育种研究的能力,在实地考察和调研的基础上,对津巴布韦烤烟育种的理念和策略、杂种利用研究和程序、杂交种的区域试验和推广应用等方面进行了介绍和分析。津巴布韦近20年来培育的烤烟品种均为雄性不育杂交种。杂交种在加快产生多抗品种方面具有优势,但多抗性亲本是杂交种聚合更多病害抗性的基础。因此,从种质资源中挖掘津巴布韦烤烟生产上主要病害的有效抗源,并成功地将其抗性基因转育到烤烟栽培品种中,培育出一批兼抗多种病害且品质优良的烤烟亲本材料,为多抗性杂交种的培育奠定了基础。与津巴布韦相比,我国在烤烟生产上推广自主选育的优质多抗杂交种数量较少,其根本原因是兼抗多种病害且品质优良的亲本材料严重缺乏。因此,我国烤烟育种上应加强抗病种质资源的挖掘利用,注重兼抗多种病害的优良亲本材料的培育,以充分利用杂交种。

     

    Abstract: To gain knowledge on the utilization of flue-cured tobacco hybrids in Zimbabwe and to take it as a reference for improving the ability of flue-cured tobacco breeding in China, the concept and strategy of flue-cured tobacco breeding, leaf research work and general program of hybrid utilization, the regional test, popularization and application of hybrids in Zimbabwe were introduced and analyzed on the basis of on-site investigation and research. In Zimbabwe, the flue-cured tobacco varieties bred in recent 20 years were all male sterile hybrids. Hybrid varieties had the advantage in speeding up breeding of new multi disease-resistant varieties. However, multi-resistant parents were the basis for the aggregation of resistances to more diseases in hybrids. Therefore, the breeding of superior parents with multi-resistant traits was the key of hybrid utilization, and effective resistant resources to most of major diseases in Zimbabwe tobacco production were screened out from germplasm resources. The resistance genes were successfully transferred into flue-cured tobacco cultivars, and a number of quality flue-cured tobacco parent materials with resistances to several diseases were bred, which built a foundation for the breeding of multi-resistant hybrids. Comparing with Zimbabwe practice, the number of quality multi-resistant hybrids independently bred and popularized in flue-cured tobacco production was less in China; the fundamental cause was the serious lack of quality parent materials with resistances to several diseases. Therefore, the research and utilization of disease-resistant germplasm in flue-cured tobacco breeding should be strengthened in China. At the same time, the breeding of quality multi-resistant parent materials should also be valued for making full use of hybrids.

     

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