子囊壳

研究结果表明：35个双交配型菌株自交都没有形成子囊壳，分别与KA3（MAT1-1）、KA9（MAT1-2）和Z46（MAT1-2）杂交形成子囊壳的菌株数为22，6和4。

Result suggest that self-cross of those 35 rice blast isolates can not produce perithecia . When they were cultured with KA3 ( MAT1-1 ), KA9 ( MAT1-2 ) or Z46 ( MAT1-2 ), the numbers of strains which can form perithecia are 22,6 and 4 , respectively .

每个子囊壳附属丝平均数量为27条，多数为20～30条。

The average number of appendages was 27 per cleistothecium .

新子座9月开始产生子囊壳，10月上、中旬大量产生子囊壳，10月上旬成熟的子囊孢子开始释放；

New stroma-ta begin to produce perithecia in Sept.

有性重组体与其亲本在菌落生长、培养性状和致病性方面没有显著差异；但某些有性重组体中，产孢量和产子囊壳能力方面存在一定差异。

There were no significant differences in mycelial growth , traits of culture and pathogenicity between the sexual recombinants and their parental isolates . Sporulation and perithecigerous capacities , however , changed more or less in some sexual recombinants .

其主要来源可分为2种情况：民和、乐都县有玉米种植的部分乡镇，初侵染来源主要是玉米根茬和秸秆上产生的子囊壳和子囊孢子；

Its main source could be divided into two kinds of states : in partly villages and towns of Minghe and Ledu counties with corn planting , the sources mainly were the procreant perithecium and ascospore on the corn stubbles and ones stalks ;