ISSN:
1573-5060
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Four inbred cabbage lines have been derived from a single parental plant through several generations of selfing. Two inbreds have been found homozygous for an “S 1” allele while the other two are each homozygous for “S 2”. Each inbred is self-incompatible, cross-incompatible with the inbred carrying the same “S” allele, and fully cross-compatible with inbreds carrying the other “S” allele. The S 1 and S 2 pairs of inbreds were each found to consist of one inbred with very high self-incompatibility (mean seed set of 0.15–0.25 seeds per pod) and one inbred with less intense self-incompatibility (mean seed set of 1.25–1.70 seeds per pod). For the S 1 pair, flower to flower and plant to plant variation in seed set per pod was much larger for the less incompatible inbred that for the highly incompatible inbred. Further, incompatibility expression of the less incompatible inbred was influenced by temperature variation while that of the highly incompatible inbred was stable under different temperature regimes. The F1 between the two inbreds of high and low incompatibility with the common “S 1” allele behaved like the less incompatible parent. F2 plants showed intermediate intensities of selfincompatibility as well as variation for both lesser and greater intensities than those exhibited by the parents. The variations of self-compatibility and the sensitivity to environmental differences are considered to be conditioned by genes which modify incompatibility expression of the “S” alleles.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00056254
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