Health & Environmental Research Online (HERO)


Print Feedback Export to File
5069190 
Journal Article 
Combining Ability of Mineral Element Contents in Hybrid Rice 
Zhu, X; Chen, Hao; Zhang, Y; Zhao, Ju; Zhou, Q; Zhou, X; Liu, S; Zhu, Z; Zhu, Dan; Tong, J 
2018 
Yes 
International Journal of Agriculture and Biology
EISSN: 1560-8530 
20 
5 
1089-1096 
WOS:000432042400018 
Understanding the genetic control of mineral element contents in the last three leaves of hybrid rice will shed light on breeding hybrid rice with ideal mineral element contents. In this study, 25 hybrid rice combinations were created using five elite male sterile lines and five restorer lines. The combining ability of potassium (K), calcium (Ca), iron (Fe), copper (Cu), magnesium (Mg), manganese (Mn), phosphorus (P), sulfur (S) and zinc (Zn) in the last three leaves of these crosses were analyzed at both active tillering stage and milky stage. The results showed that the variance of the general combining ability (GCA) of these parents was larger than the variance of the specific combining ability (SCA) of all crosses. Moreover, larger variation range of heterosis was found in the lines crossed from the parents with the larger variance of SCA. The restorer lines exhibited stronger heritability than sterile lines for Ca, Cu, Mn, S, Zn at active tillering stage and for K, Ca, S, Zn at milky stage. The further phenotypic evaluation for tested crosses revealed that the content of some mineral elements in the last three leaves showed positively significant correlation with yield-related traits. Selecting parents with higher GCA and larger variance of SCA will help us develop the hybrid combination with ideal content of mineral elements and good yield performance for the future hybrid rice breeding program. (C) 2018 Friends Science Publishers 
Mineral elements; Combining ability; Rice; Correlation analysis; Heterosis