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V. Geethalakshmi

Tamil Nadu Agricultural University Coimbatore, INDIA

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COMBINING ABILITY ANALYSIS AND HETEROSIS ESTIMATES IN HIGH QUALITY PROTEIN MAIZE INBRED LINES*

Manpreet Bajaj, Sitar Singh Verma, Anil Kumar, Manoj Kumar Kabdal, Jay Prakash Aditya, Ashish Narayan

Affiliations

¹Department of Genetics and Plant Breeding, G.B. Pant University of Agriculture and Technology, Pantnagar - 263 145, India

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Cite article:- Bajaj Manpreet, Verma Singh Sitar, Kumar Anil, Kabdal Kumar Manoj, Aditya Prakash Jay, Narayan Ashish (2025). COMBINING ABILITY ANALYSIS AND HETEROSIS ESTIMATES IN HIGH QUALITY PROTEIN MAIZE INBRED LINES*. Indian Journal of Agricultural Research. 41(1): 49 - 53. doi: .

ABSTRACT

Combining ability analysis using top cross method was performed in high quality protein maize (QPM) inbred lines for yield and yield contributing characters in order to assess the QPM inbred lines for general combining ability (gca) and to estimate mid parent and standard heterosis. The major interest was to seek out specific set of lines having maximum genetic distance that maximizes expression of heterosis in hybrid combination. The top cross, I14 x S superceded the checks in grain yield followed by the other crosses I6 x S, I4 x S, I3 x S, I18 x S and I7 x S. Significant positive gca effects for grain yield were revealed by the inbred I3, I4 and I6. Mid parent heterosis was observed to be 53.08% for grain yield in cross, I14 x S. The cross showed highest standard heterosis for grain yield (36.83%). The inbred line I7, I18 and I20 revealed negative significant gca effects for days to 50% silking which can be utilized for developing early maturing hybrids.

KEYWORDS

REFERENCES

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