野生长穗桑与栽培桑品种远缘杂交的育性研究

Study on Fertility of Distant Hybridization of Morus wittiorum×Cultivated Mulberry Varieties

为了探讨长穗桑与栽培桑的远缘杂交育性,进行了长穗桑×栽培桑和栽培桑×长穗桑2种远缘杂交试验。结果表明,不同的远缘杂交类型、同一远缘杂交类型的不同组合在受孕率、结实率和可育性上有较大的差异,长穗桑×栽培桑的杂交受孕率在56.76%-90.20%,杂交结实率在52.06%-81.28%,杂交可育性在17.52%-60.57%;栽培桑×长穗桑的杂交受孕率在31.86%-54.07%,杂交结实率在30.69%-48.53%,杂交可育性在6.78%-20.56%。长穗桑×栽培桑的平均杂交受孕率、杂交结实率和杂交可育性比栽培品种×长穗桑分别提高25.27、28.37和23.21百分点。

The results from studying fertility of distant hybridization of Morus wittiorum×cultivated Mulberry Variety showed that there were obvious difference in pregnancy rate,seed setting rate and fertility between different distant hybridization types and between different combinations of the same distant hybridization type,the pregnancy rate,seed setting rate and fertility of Morus wittiorum×cultivation mulberry variety were 56.76%～90.20%,52.06%～81.28% and 17.52%～60.57% respectively,the pregnancy rate,seed setting rate and fertility of cultivated mulberry variety× Morus wittiorum was 31.86%～54.07%,30.69%～48.53% and 6.78%～20.56% separately,and the average pregnancy rate,seed setting rate and fertility of wild Morus wittiorum×cultivated mulberry variety was 25.27%,28.37% and 23.21% higher than those of cultivated mulberry variety×Morus wittiorum respectively.