Evaluation of 99 S1 lines of maize for inbreeding depression
2010
Ahmad, M. (KPK Agricultural Univ., Peshawar (Pakistan)) | Khan, S. (Agricultural Research Station, Mansehra (Pakistan)) | Ahmad, F. (Agricultural Research Station, Mansehra (Pakistan)) | Shah, N.H. | Akhtar, N.
The research was conducted to evaluate the performance of S1 lines for inbreeding depression regarding different parameters, using maize variety Azam. The maize variety was self-pollinated for one generation in spring season and in the next sowing season 99 S1 lines obtained from selfing was sown with a parental line. Days to silking, pollen-shedding, plant height, ear-height, ear-length, ear-diameter, number of ears/row, kernel rows/ear and 100 kernel weight showed inbreeding depression with varying degrees while yield kg/ha showed severe inbreeding depression with an average of 362.08 kg/ha. Average value of inbreeding depression for days to silking and pollen-shedding was calculated as 2.02 and 2.21 days, respectively. Average values of inbreeding depression for plant height and ear-height were recorded as 21.50 cm and 4.87 cm, respectively. While, for ear-length, ear-diameter, number of ears/row, kernel rows/ear and 100 grain weight, the average value of inbreeding depre
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