ESTIMATING HETEROSIS AND COMBINING ABILITY FOR in vivo AND in vitro TRAITS USING DIALLEL CROSS IN MAIZE (Zea mays L.) | ||
| Journal of Productivity and Development | ||
| Article 7, Volume 16, Issue 1, January 2011, Pages 101-120 PDF (439.34 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jpd.2011.42432 | ||
| Authors | ||
| Hamdy Emara* ; Ahmed Abas Nower; Khaled Salem; Shams El-Taher | ||
| Plant Biotechnology Department, Genetic Engineering and Biotechnology Research Institute (GEBRI), Sadat City, Minufiya University,Egypt. | ||
| Abstract | ||
| Combining ability and heterosis studies were performed for in vivo and in vitro traits in a diallel cross involving five maize inbred lines. Mean squares of genotypes were found to be significant for all in vivo and in vitro studied traits except callus formation percentage. Mean squares of parents were found to be significant for all in vivo and in vitro studied traits except grain yield per plant, callus fresh weight II and callus formation percentage. Mean squares of the resultant ten hybrids combination were found to be significant for all in vivo and in vitro studied traits except callus formation percentage. Mean square estimates of parent vs. crosses were found to be highly significant for all studied traits except callus growth rate III. Both general (GCA) and specific combining ability (SCA) variances were found to be highly significant for all in vivo and in vitro studied traits except callus formation percentage and callus growth rate II. The GCA/SCA ratios were found to be less than unity for all traits except callus growth rate III. The inbred line L173 was considered to be good general combiner for all studied traits (plant height, earheight, ear length, ear diameter, number of rows per ear, grain yield per plant, callus fresh weight I, callus fresh weight II, callus fresh weight III, callus formation percentage, callus growth rate I, callus growth rate II and callus growth rate III). The correlation coefficient was positive and highly significant between in vitro and in vivo characters except callus growth rate III. Information generated from this study can be useful for selecting parents and hybrids to maximize the grain yield and its components in maize. | ||
| Keywords | ||
| Maize (Zea mays L.); Diallel cross; Heterosis; Combining ability; in vivo and in vitro traits | ||
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