被子植物无融合生殖种质资源研究

Study on Germplasm Resources of Apomixis in Angiosperms

已发现 3 6个科 440多个种的被子植物具有无融合生殖特性 ,包括无孢子生殖、二倍体孢子生殖和不定胚生殖 其中 1 0个科有无孢子生殖特性 ,1 0个科具二倍体孢子生殖特性 ,2 2个科具不定胚生殖特性 ,4个科兼具二倍体孢子生殖和无孢子生殖特性 ,1个科兼具无孢子生殖、二倍体孢子生殖和不定胚生殖三种生殖特性 ,1个科有不定胚和无孢子生殖特性 双子叶植物至少 2 8个科有无融合生殖特性 ;单子叶植物至少 5个科具有无融合生殖特性 ,其中禾本科植物 49个属 1

Plants with apomictic mechanisms of diplospory,apospory and adventitous embryo have been reported in 36 families including over 440 species.10 families posses aposporous plants,10 families share diplosporous species,22 families can reproduce through adventitious embryo,4 families are characteratic of both apospory and diplospory,1 family can produce aposporous embryo sacs,diplosporous embryo sacs,and adventitious embyos,and 1 family can propagate through adventitous embryo or apospory.There are more than 160 aposporous or diplosporous grasses distributed in 49 genus.