南京农业大学学报2011，Vol.34Issue(5)：37-42,6.
金樱子与2个现代月季品种杂交结实率差异的原因
Factors affecting fruting rate in the crosses between Rosa laevigata Michx.and two rose cultivars
摘要
Abstract
The artificial hybridization was carried out between diploid wild species Rosa laevigata Michx. And two rose cultivars: ' Dongfangyuxiao' and ' Huoyanwu ' , and pollen viability of male parent was tested, germination behavior of pollen grains on the stigmas after pollination was examined, and embryo development was observed. It was found that before the two rose varieties pollinating,the pollen viability of male parent was 39. 8%. During the different time after pollination, average germinating pollen number and germinating rates on each stigma increased first and then decreased, and at 12 h after pollination, the two numbers reached the highest value. Subsequently,most pollen tubes were thin,short and curved,stayed on the stigmas' surface and failed to enter ovaries. At 48 h after pollination, there were few geminated pollen grains. At 10 d after pollination, many earlier embryo in ovaries of Dongfangyuxiao' began to degenerate,and as a consequence, no seeds were obtained. Torpedo and cotyledonary embryos were observed in ovaries of ' Huoyanwu' ,but in the later phase, most embryos degenerated, and fruit set was only 6. 3%. These results suggested that the male pollen viability was not low,most germinated pollen grains on the stigmas were abnormal before fertili-zation, and degeneration of a large number of early embryos after fertilization,which may be the main factors resulting in infertility in the cross between' Dongfangyuxiao' and Rosa laevigata Michx. ,whereas only embryo abortion is a main factor resulting in low seed set in the cross between' Huoyanwu' and Rosa laevigata Michx. .关键词
金樱子/现代月季/人工杂交/结实率/萌发形态/胚胎败育Key words
Rosa laevigata Michx. / modern roses/ artificial hybridization/ fruit rate/ germination behavior/ embryo abortion分类
农业科技引用本文复制引用
宋杰,王国良..金樱子与2个现代月季品种杂交结实率差异的原因[J].南京农业大学学报,2011,34(5):37-42,6.基金项目
江苏省科技支撑计划项目(BE2008400) （BE2008400）
“十一五”国家科技支撑计划项目(2006 BAD01 A1805) （2006 BAD01 A1805）
