樱草杂种花柱条件性假自交亲和性中 S 等位基因的鉴别。

S allele discrimination in styles of Petunia hybrida bearing stylar-conditioned pseudo-self-compatibility.

机构信息

Department of Horticultural Science and Landscape Architecture, University of Minnesota, St. Paul, MN, USA.

出版信息

Theor Appl Genet. 1979 Jan;55(1):23-8. doi: 10.1007/BF00282972.

Abstract

A cross between a 0% pseudo-self-compatible (PSC) plant (S3.3) and a 100% PSC plant (S1.1) yielded an F1 population which, when selfed, produced a high mean seed set which was not significantly different than that produced when the F1 was backcross pollinated by the 100% PSC parent. Backcross pollinating the F1 with the 0% PSC parent yielded no seed. No S3.3 plants were recovered in the F2 populations, indicating that pollen tubes containing the S3 allele were inhibited during pollen tube growth of the selfed F1 plants. Apparently stylar-conditioned PSC does not remove all discriminatory power from these petunia styles. Crossing the F1 (S1.3) with an self-incompatible (SI) plant (S2.2) produced plants which were used for computation of a standard linkage test. An approximate map distance of 28 units was found between the S specificity locus and the major gene(s) which influenced its expression. Other generalized PSC modifying genes apparantly were not linked with the S locus.

摘要

一个 0%假自交亲和（PSC）植物（S3.3）和 100%PSC 植物（S1.1）的杂交产生了一个 F1 群体，当自交时，产生的平均种子结实率非常高，与当 F1 通过 100%PSC 亲本回交授粉时产生的种子结实率没有显著差异。用 0%PSC 亲本回交授粉 F1 时没有产生种子。在 F2 群体中没有恢复到 S3.3 植物，这表明含有 S3 等位基因的花粉管在自交 F1 植物的花粉管生长过程中受到抑制。显然，花柱条件 PSC 并没有从这些矮牵牛花柱中去除所有的辨别能力。将 F1（S1.3）与自交不亲和（SI）植物（S2.2）杂交产生的植物用于计算标准连锁测试。发现 S 特异性座与影响其表达的主要基因（s）之间的近似图距为 28 个单位。其他广义的 PSC 修饰基因显然与 S 座没有连锁。