Biometrical Methods In Plant Breeding.pdf [VERIFIED] Leave a comment


Biometrical Techniques In Plant Breeding.pdf

However, plant height was not a major influence on the molecular markers nor QTL estimates (Tables 3, 4). Coefficient of variation (CV) among the trials was up to 41% for the winter wheat and up to 25% for the spring in the study of Gladiol et al. (2015). Cloutier et al. (2005) reported wide variation among the trials on watermelon, ranging from 15 to 50% in plant height, whereas watermelon weight ranged from 0.5 to 2.5 kg. Mebrahtu and Mohamed (2011) reported CV values as high as 77% when plant height and green pod yield were estimated as intact plants. This is due to very high heritability estimates (Table 1, Table 2). The heritability estimate for the plant height of winter wheat was 0.90, similar to the previous study of Mohamed and Mebrahtu (2006) (0.88). This means that on average the plants have the same height. In the present study, heritability estimate for the plant height of spring wheat was 0.60.

The examination of the heritability of the traits between seasons indicated that height and weight were the most heritable traits among the plant, whereas dry biomass is less heritable at 12%. There was no significant difference in the estimates of sub-trait variance components between seasons except for the dry biomass (Table 2).

At the phenotypic level, there is a wide variation for the plant height and weight in the spring and winter wheat genotypes (Tables 3, 4). Plant height is a complex and important agronomic trait. Its effect is strongly correlated to the plant maturity stage. It is affected by many factors, including seed rate, seed size, previous crop, and soil fertility. The PPM results demonstrated that the amount of parental variance was higher than the residual variance in plant height -71% – for the permanent sub-plot and -73% – for the transient sub-plot for the spring wheat (Tables 3, 4).


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