Study on the Inheritance Rules of Agronomic Traits in the Progeny of Crosses between Local Species of Xinjiang Proso Millet
Through direct and reciprocal crosses between two varieties of proso millet purple culm with lateral spikes(TKS)and(yellow culm with dense spikes(HP),the genetic variation for seven agronomic traits,such as plant height,number of nodes on the main stem,as well as panicle length were measured and the segregation of stem and leaf color as well as panicle type in the second generation(F2)was examined.The results showed that stem and leaf color as well as panicle shape segregated in both TKSXHP(TH)and HPXTKS(HT)populations in F2.The segregation ratio of purple to yellow in stem and leaf color in the HT population was about 15∶1,indicating that purple was dominant to yellow and purple was controlled by multiple genes.The segregation ratio of purple to yellow in stem and leaf color in the TH population was about 1∶1,indicating that purple was controlled by multiple genes.In F2,the panicle weight of two groups was higher than the parental range,the panicle length of HT population was higher than the parental range,and the plant height was lower than the parental range,so there was transgressive segregation.The mid-parent heterosis in the TH population was more obvious tha that in HT population.The genetic diversity indices of panicle type and stem and leaf color were the greatest in F2.In the correlation analysis,two groups showed an extremely significant positive correlation between panicle shape and the color of stems and leaves,while other traits showed different correlations.
Proso milletAgronomic traitsStem and leaf colorPanicle typeTransgressive segregationMid-parent heterosisInheritance rule
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