摘要
选用两个抗褐飞虱的药用野生稻编号材料与两个感虫栽培品种杂交，通过胚培养获得了Ｆ１、ＢＣ１Ｆ１和Ｆ２植株。Ｆ１杂种表现出野生亲本紫色柱头、长芒及抗褐飞虱等特性，其花粉母细胞中期Ⅰ染色体多为单价体（仅０．７７个二价体），甚至不能形成花药，因而表现雄性不育，仅获得一株Ｆ２，染色体数目为２ｎ＝４６。用栽培稻回交获得ＢＣ１Ｆ１植株为异源三倍体，中期Ⅰ染色体构型为１２．２５Ⅰ＋１１．８５Ⅱ＋０．０１Ⅲ。
Three interspecific crosses involving two accessions of Oryza officinalis with brown planthopper(BPH) resistance and two improved susceptible lines of O.sativa were attempted,and F1,F2 and BC1F1 hybrids were prepuced through embryo culture.The F1 hybrids shared traits from O.officinalis such as purple stigma,long awn and BPH resistance,and were male sterile due to the low amount of chromosome pairing(0.77 bivalents) or failure of anther formation;nevertheless,one F2 plant with 2n =46 was unexpectedly obtained.BC1F1 plants resulted from backcrossing to O.sativa were allotriploid (AAC) with a chromosome configuration of 12.25 Ⅰ+11.85 Ⅱ+0.01Ⅲ at metakinesis Ⅰ(MI).
出处
《中国水稻科学》
CAS
CSCD
北大核心
1996年第3期138-142,共5页
Chinese Journal of Rice Science
基金
中国农业科学院院长基金
关键词
水稻
药用野生稻
杂种
形态学
细胞遗传学
brown planthopper resistance
chromosome pairing
interspecific hybrid
Oryza officinalis
Oryza sativa
