摘要
选用3个水稻野败胞质不育系及相应的保持系,3个恢复系及它们相应的野败胞质代换系,这些不育系、保持系同恢复系配组的18个 F_1,分别在秧苗期接种属我国7个稻瘟病生理小种群的21个菌株;在成株期接种15个白叶枯病菌株。结果表明,野败胞质较之正常胞质表现对这两种病菌感病稍轻;这种差异在多数保持系的基因型背景下达到显著水准,而在恢复系或育性完全恢复的 F_1基因型背景下,差异不显著。对杂交稻育种中胞质多样化的重要性亦作了讨论。
The effect of cms-WA cytoplasm on the expression of leaf blast and bacterialblight was studied.21 isolates,belonging to seven representive races of P.oryzae inChina and 15 isolates of X.campestris pv.oryzae were used to inoculate the followinghybrid rice systems:3 cms-WA male-sterile lines(A-line)and their correspondingmaintainer lines(B-line),3 restorer lines(R-line)and their corresponding versionsin cms-WA cytoplasm as well as 18 hybrids with both normal and cms-WAcytoplasm.It was revealed that cms-WA cytoplasm appeared less susceptible to bothdiseases than cmf cytoplasm and shown that the differences in susceptibility to both dis-eases attained highly significant levels only in some of the A-lines and B-lines,Nocytoplasmic effects appeared in other nuclear cases,including R-lines and hybrids withcompletely restored fertility.The importance of cytoplasmic and genetic diversity in hybrid rice breeding wasalso discussed.
出处
《作物学报》
CAS
CSCD
北大核心
1989年第4期310-318,共9页
Acta Agronomica Sinica
关键词
水稻
杂交
稻瘟病菌
白叶枯病菌
Cytoplasmic inheritance
Male-sterile cytoplasm
P.oryzae
X.campestris pv.oryzae
Hybrid rice
Cytoplasmic diversity
