栽野稻杂交F_1的进化遗传

Evolutionary Genetics of the F1 of O.sativa×O.rufipogon

用籼粳稻分别与普通野生稻（Ｏ．ｒｕｆｉｐｏｇｏｎ）杂交，观察杂交Ｆ１籼粳性状的表现情况。据此分析认为，普通野生稻存在某些形质的籼粳分化现象，但分化是局部的，就总体来说，普野仍属非籼非粳的“中性型”；从籼或粳与普野杂交有较高的杂交结实率和相似的亲缘关系看，籼稻和粳稻的起源应是平行的，粳稻并非从籼稻而来，籼粳稻可能分别直接来源于不同地理生态型的普通野生稻。

he phenotypic characters of the Hsien or Keng in the F1 of O.sativa×O.rufipogon were analysed.Based on these,the evolution of HsienKeng was discussed.According to the result of the test,it was considered that there was HsienKeng differentiation phenomenon in O.rufipogon.In general,the differentiation was preliminary.So,O.rufipoton belongs to a type of“nonHsien”and “nonKeng”.Both Hsien×O.rufipogon and Keng×O.rufipogon showed a quite high seed setting percentage and similar affinity.The origins of Hsien and Keng were parallel.Both of them might originate respectively from different ecovariation of O.rufipogon.