National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Ten S1 lines along with three hybrids were evaluated in randomized block design at Instructional-cum-Research (ICR) Farm of Assam Agricultural University, Jorhat. The aim to study the genetic variability, heritability, genetic advance and low nitrogen tolerance of S1 lines derived from local maize germplasms. The experiment consisted of two trials with the same set of genotypes in two different nitrogen levels, viz., 80 kg N ha-1 and 0 kg N ha-1. Analysis of variance revealed presence of sufficient amount of variation among the genotypes for the traits except ears per plant at both N0 and N80 levels. At both N0 and N80 levels moderate to high estimates of GCV and PCV recorded for grain yield per plant, ear height, number of kernels per row, ear length, days to 50% pollen-shed, 100 KW, NRA and NUE indicated sufficient variability in the set of germplasms. For grain yield and nitrogen use efficiency, the S1 lines viz., MIZ-2 and MEG-11 were identified as promising at N80 level and MEG-11 and TR-1 were identified as promising at N0 level. MIZ-2, AR-1, MIZ-7 and TR-1 had less ASI at N0 level. It indicates that those lines could be tolerant to low N-stress.
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