小麦×羊草远缘杂交的受精和胚胎发育  

Fertilization and Embryo Development in Hybridization Between Triticum aestivum L and Leymus chinensis

作　　者：雷和田[1,2] 赵云云[1,2] 王景林 杨才 

机构地区：[1]首都师范大学生物系 [2]河北省张家口地区坝上农业科学研究所

出　　处：《华北农学报》1997年第2期29-32,共4页Acta Agriculturae Boreali-Sinica

摘　　要：对小麦（ＴｒｉｔｉｃｕｍａｅｓｔｉｖｕｎＬ）和羊草（ＬｅｙｍｕｓｃｈｉｎｅｎｓｉｓＴ．）杂交的受精和胚胎发育进行了研究。羊草花粉在小麦柱头上萌发较好，花粉管能顺利穿过柱头，进入胚囊。在检查过的３１０个子房中，１７个（５．５％）发生了双受精，产生了胚和胚乳；２个（０．６５％）发生了单卵受精，只产生胚而无胚乳；７个（２．２６％）发生了单极核受精，只产生胚乳而无胚。小麦×羊草虽然受精率为８．４１％，但最后结实率很低，若利用胚培养技术对杂种胚进行早期离体培养。Studies were made of the fertilization and embryo development in intergeneric crossing between Triticum aestivum L and Leymus chinensis. The pollen germination of Leymus chinensis appeared normal on the stigma of Triticum aestivum L and the pollen tube grew into the style and entered the embryo sacs.Double and single fertilization were observed in the pollinated florets of the 310 ovaries examined 17(5.5%)had double fertilization and had embryo and endosperm.Two(0.63%)had only embryo and 7(2.2%)had endosperm.However,the total percentage of fertilization was occupied 8.3%,and the seed was hardly obtained; yet it may be suggested that the potential of increasing the frequency of hybrid plant obtainment was great in the cross between wheat and Leymus chinensis T.,if embryo culture technique is employed at the early stage of hybrid embryo development.

关 键 词：小麦 羊草 远缘杂交 胚胎发育 

分 类 号：S334.3[农业科学—作物遗传育种]