Analysis of seed set under inbreeding and open pollination in varieties and lines of radish
1995
Narbut, S.I. | Vojlokov, A.V. | Maksimenko, O.E. | Glotov, N.V.
Seed set in three radish varieties and 34 lines obtained from them by inbreeding were studied for six years (1968-1973). Irregular variation in pod frequencies and the number of seeds per pod under inbreeding and open pollination was observed. The variety Virovskii Belyi was stable in terms of the means of the characters under study from year to year. Out of two other varieties, Saxa and Ledyanaya Sosul'ka, the first variety displayed temporal stability only for the number of seeds under open pollination. In Ledyanaya Sosul'ka, pod frequencies and the number of seeds per pod may reach very high values, comparable with those from cross-pollination. In groups of lines originating from three radish varieties, significant interline variation in all traits occurred; on the whole, in groups of lines, a high variability of the characters tested from year to year was observed. The level of interline intragroup variability was virtually the same in all three groups. Mean pod frequency after selfing is constantly higher in lines derived from Virovskii Belyi than in the original variety; in some years, this tendency was observed in the Saxa variety; in Ledyanaya Sosul'ka, this trend was shown during the first three years of the survey, while during the last three years, the opposite situation occurred. After open pollination, mean pod frequencies and the number of seeds per pod were constantly lower in lines of all groups than in the corresponding parental varieties. The last two facts are explained by selection for a high level of self-fertility in lines after selfing and by expression of inbred depression of the total fertility, respectively
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