Title: Intergeneric cross-compatibility between Dendranthema × grandiflorum and Ajania pacifica and the seed sets of their F_1 progenies in different conditions of backcross,selfing and open pollination
Abstract: Intergeneric cross-compatibility between Dendranthema×grandiflorum'Aoyunhuoju','Yidalihong'and Ajania pacificaand the seed sets of their F1 progenies in different conditions of backcross,selfing and open pollination were investigated.The pollen germinated well on the stigmas no matter what D.×grandiflorum or A.pacifica as the female parent,but the seed sets were very low even no seeds.The seed sets of reciprocal hybrids between'Aoyunhuoju'and A.pacifica were 3.72 per capitulum,and the seed sets of reciprocal hybrids between'Yidalihong'and A.pacifica were 1.2 and 0.87,respectively.The seed sets of the backcross of F1 progenies between'Aoyunhuoju'and A.pacifica with'Aoyunhuoju'were very low even no seeds,the same as those of the backcross of reciprocal hybrid F1 between'Yidalihong'and A.pacifica with their parents.The selfing seed sets of all F1 progenies were almost 0.However,the seed sets in open pollination were very high and the highest seed set was up to 47.5 per capitulum.It can be inferred that the development process of female gamete was normal and the reproductive course of F1 was also normal.The reasons of low seed sets of backcross were the distant crossing barrier and low seed sets of selfing were determined by the mechanism of self-imcompatability.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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