云南光壳稻与籼粳测验种间三交F1育性表达研究

 对南京11，光壳稻和巴利拉或秋光配制的单交、测交28个组合F₁，F₂及其亲本在云南籼粳交错区的宜良县进行育性鉴定分析表明：（1）云南光壳稻与籼粳杂种F₁易受低温影响，其广亲和基因难以表达。南京11与矮嘎、明子谷、木帮谷、毫秕、镰刀谷、末烈谷等光壳稻杂种F₁和F₂代的育性表达基因不同，F₁的育性表达基因易受环境影响；但F₂育性表达符合广亲和基因的遗传模式；并受主基因控制。（2）南京11，光壳稻与巴利拉测交组合F₁单株多数为不育株，不育株与可育半不育株比例符合X₂检验1∶1理论值的分界以5％和10％居多。（3）云南光壳稻与籼粳杂种育性基因的表达与环境因子密切相关，秋光的S－8育性恢复基因与该基因属于等位基因。

Fertility Expression of Three Way Crosses F1 betweenYunnan Nuda and Its Test Varieties

28 Cross combinations were made with Nanjing 11, Balilla or Akihikari and Nuda rice(with glossy, hairless husk) varieties and the fertility of their F1s and F₂s was evaluated at Yiliang county of the cross areas of indica and japonica in Yunnan Province:(1) Hybrid F_１ between Yunnan nuda and indica or japonica was easily affected by the low temperature, its wide compability is difficult to express. It is difference to fertility expression gene of hybrid F₁ and F₂ between Nanjing 11 and Aiga,Mubanggu, Liandaogu and Moliegu etc.varieties, F_１ fertility expression is easily affected by environment, but F_２ conform to genetic model of the wide compability gene, and it is controlled by the mainly gene. (2) Most single-plant of test cross F_１ between Nanjing 11, Balilla and Nuda rice are the sterile plants. The fertility boundary that the rate of the sterile and ferility plants (including semisterility plant) accorded with the theory value(1∶1) were relatively more at 5% and 10%.(3) It is connected with the environment to fertility expression gene of hybrids between Yunnan nuda rice and indica or japonica, S-8 fertility restoring gene of Akihikari and this gene belongs to allele.