4-LOCUS S-GENE CONTROL OF SELF-INCOMPATIBILITY MADE PROBABLE IN LILIUM-MARTAGON (LILIACEAE)

被引:18
作者
LUNDQVIST, A
机构
[1] Department of Genetics, University of Lund, Lund
关键词
D O I
10.1111/j.1601-5223.1991.tb00553.x
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
Two reciprocal F1-families comprising 15 and 8 individuals, respectively, were obtained from the cross of two plants growing at 3 m distance from one another in the garden of the Royal Veterinary and Agricultural University in Copenhagen. Self-pollinated F1-plants had almost complete lack of seed-set; cross-pollinations were generally successful among the 489 cross combinations conducted (506 possible). Delayed cross-pollination - after self-pollination - was equally successful, which indicates that lack of seed-set after self-pollination is not due to a postzygotic mechanism. Studies of pollen tube growth, by ultraviolet microscopy, did not, however, indicate different growth rates, 24 hours after pollination, between self-pollinated and cross-pollinated pistils; the ovary was reached in both cases. No cases of reciprocal incompatibility being obtained among the 23 F1-sibs, a complex complementary S-gene mechanism is presumed, with gametophytic pollen control and involving at least 3 or, more probably, 4 loci. The genetic analysis in this species is hampered by the long generation cycle; in the present case seven years were required to obtain flowering F1-plants.
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页码:57 / 63
页数:7
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