摘要
以６个抗白叶枯病等级不同的品种作６×６双列杂交，按Ｈａｙｍａｎ模型对接种前后过氧化物酶活性变化值作遗传分析。结果表明，在遗传方差中，加性方差占３４３１％，显性方差占４６１７％，上位性方差占１９５０％；广义遗传率ＨＢ２＝９４１６％，狭义遗传率ＨＮ２＝３１３１％；最少加性基因数Ｋ＝４，显性基因数Ｋ′＝１；具超显性遗传。
A 6×6 diall cross of six rice cultivars with different resistance to bacterial blight (Xauthomonas oryzae) was made. Genetic analysis on the peroxidase activity was conducted by Hayman's Model. Within genetic variance, additive, dominance and epistasis variance are 34.31% , 46.19% and 19.50% respectively. Heritability in broad sence ( h B 2)is 94.16% , while heritability in norrow sence ( h N 2) is 32.31%. Least number of additive genes ( K ) is four, while number of dominant genes ( K ′) is one. The inheritance of the peroxidase activity is transgressive dominant, and the action direction of different dominant loci is vary. In the genitic population, the frequancy of position effect genes ( p ) equals to 0.62, while the frequence of negative effect genes ( q ) equals to 0.38, and the distribution of positive and negative effect genes derived from cultivars with different resistance is markedly different.
出处
《华南农业大学学报》
CAS
CSCD
1996年第4期35-40,共6页
Journal of South China Agricultural University
