Gene action and heritability for photosynthetic activity in two wheat crosses
Gene action and heritability for photosynthetic activity were estimated from generation means in two wheat crosses during two stages (5; th; leaf and flag leaf between 2 and 5 days after anthesis). Six generations were available for each cross: parents (P₁ and P₂), F₁, F₂ and backcrosses (BC₁ and...
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| Formato: | Articulo |
| Lenguaje: | Inglés |
| Publicado: |
1994
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/131712 |
| Aporte de: |
| Sumario: | Gene action and heritability for photosynthetic activity were estimated from generation means in two wheat crosses during two stages (5; th; leaf and flag leaf between 2 and 5 days after anthesis). Six generations were available for each cross: parents (P₁ and P₂), F₁, F₂ and backcrosses (BC₁ and BC₂). Correlations between some morphophysiological characters and photosynthetic activity of the flag leaf was also determined. The joint scaling test described by Mather & Jinks was used to determine the gene action. It showed that them; [d]; [h]; [i], [l] (mean, additivity, dominance, additive x additive interallelic interaction effects, dominance x dominance interallelic interaction effects) model fits the two crosses at both measurement times. All the model genetic components were significant for the flag leaf, however for the 5; th; leaf only [h]; [i] and [l] were significant. The presence of additive and additive x additive effects suggested the possibility of selecting for this character using the flag leaf so as to obtain pure inbred lines. Dominance effects [h] were negative and dominance x dominance effects [l] were positive. Broad sense heritability values were medium to low. There were no correlations between the studied morphophysiological characters and the photosynthetic activity. |
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