An Analysis of the Heterosis and Yield Component Factors of Middle-short-stalked Sorghum Hybrids
2001; Jilin Academy of Agricultural Sciences; Linguagem: Inglês
ISSN
1000-5684
Autores Tópico(s)Regional Economic and Spatial Analysis
ResumoBy comparing 8 agronomic characters including grain yield per plant, kilo kernel weight, kernel numbers per plant, plant height, panicle length , leaf area, days to flowering and days to maturity, this paper studied the heterosis of 15 middle short stalked sorghum hybrids derived from an incomplete diallel cross. It also made a study of the yield component factors of the hybrids mentioned above by analyzing their genetic correlations and path coefficients. The results are as follows:(1)Heterosis analysis indicated that heterosis was different in different characters. It can be classified into two types: heterosis of average and heterosis of high parent.(2)Genetic correlation analysis showed that grain yield per plant was positively correlated with the characters of days to flowering,days to maturity, kernel numbers per plant,panicle length and kilo kernel weight, but negatively correlated with plant height and leaf area (3)Path coefficient analysis showed that kernel numbers per plant and kilo kernel weight made greater contribution to grain yield. Based on these characters and a consideration of their relationship with panic length, high yield hybrid seeds could be selected.
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