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( Kamaluddin ),( Rishi Muni Singh ),( Malik Zainul Abdin ),( Mather Ali Khan ),( Tanweer Alam ),( Salim Khan ),( Lal Chand Prasad ),( Arun Kumar Joshi ) 한국식물학회 2007 Journal of Plant Biology Vol.50 No.4
To understand the genetic control of grain filling duration (GFD), i.e., the number of days from anthesis to physiological maturity, we studied the F1, F2, BC1 and BC2 generations of six spring wheat crosses from nine varieties/genotypes. Generation mean analysis for gene effects indicated that one or more types of epistasis were significant in all crosses. In each pairing, the F1 and F2 means were either intermediate or closer to the mean of the parent having the longer GFD. Our narrow-sense heritability estimate was reasonably high, at 47.67 (based on diallel analysis). This demonstrated that progress could be made from the selection in these crosses for either long or short GFD. The two early varieties that had identical maturity durations differed in their GFD values, indicating that maturity dates are not good criteria when choosing parents for modifying GFD. To utilize favorable additive × additive effects during this selection, we suggest that a single seed descent (SSD) or bulk opulation approach be adopted. In comparison, dominance effects would prove quite useful in hybrid wheat breeding programs.
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Impact of sulphur and nitrogen application on seed and xanthotoxin yield in Ammi majus L.
Saif Ahmad,Arshad Jamal,Inayat Saleem Fazili,Tanweer Alam,Mather Ali Khan,Kamaluddin,Mohd. Iqbal,Malik Zainul Abdin 한국작물학회 2007 한국작물학회지 Vol.52 No.2
Field experiments were conducted to determine the physiological and biochemical basis of the interactive effect of sulphur (S) and nitrogen (N) application on seed and xanthotoxin yield of Ammi majus L. Six treatments were tested (T1=control-without manure and fertilizers, T2=manure @ 9 kg plot-1-10 t ha-1, T3=S0N50 K25P25, T4=S40N50K25P25, T5=S40N100K25P25, T6=S20+20N50+50 K25P25). Nitrate reductase (NR) activity and ATP-sulphurylase activity in the leaves were measured at various phenological stages, as the two enzymes catalyze rate-limiting steps of the assimilatory pathways of nitrate and sulphate, respectively. The activities of these two enzymes were strongly correlated with seed and xanthotoxin yield. The highest nitrate reductase activity, ATP-sulphurylase activity and xanthotoxin yield were achieved with the treatment T4. Any variation from this treatment decreased the activity of these enzymes, resulting in a reduction of the seed and xanthotoxin yield in Ammi majus L. The higher seed and xanthotoxin yield achieved in Ammi majus L. at treatment T4 could be due to optimization of leaf soluble protein and photosynthetic rate, as these parameters are influenced by S and N assimilation.
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Impact of Sulphur and Nitrogen Application on Seed and Xanthotoxin Yield in Ammi mejus L.
Saif Ahmad,Arshad Jamal,Inayat Saleem Fazili,Tanweer Alam,Mather Ali Khan,Kamaluddin,Mohd. Iqbal,Malik Zainul Abdin 韓國作物學會 2007 한국작물학회지 Vol.52 No.2
Field experiments were conducted to determine the physiological and biochemical basis of the interactive effect of sulphur (S) and nitrogen (N) application on seed and xanthotoxin yield of Ammi majus L. Six treatments were tested (T1 = control-without manure and fertilizers, T2 = manure @ 9 kg plot-1-10~;t~;ha-1,~;T3=A0N50K25P25,~;T4=S40N50K25P25,~;T5=S40N100K25P25~;T6=S20+20N50+50K25P25) ). Nitrate reductase (NR) activity and ATP-sulphurylase activity in the leaves were measured at various phonological stages, as the two enzymes catalyze rate-limiting steps of the assimilatory pathways of nitrate and sulphate, respectively. The activities of these two enzymes were strongly correlated with seed and xanthotoxin yield. The highest nitrate reductase activity, ATP-sulphurylase activity and xanthotoxin yield were achieved with the treatment T4 . Any variation from this treatment decreased the activity of these enzymes, resulting in a reduction of the seed and xanthotoxin yield in Ammi majus L. The higher seed and xanthotoxin yield achieved in Ammi majus L. at treatment T4 could be due to optimization of leaf soluble protein and photosynthetic rate, as these parameters are Influenced by S and N assimilation.
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Impact of Sulphur and Nitrogen Application on Seed and Xanthotoxin Yield in Ammi majus L.
Ahmad, Saif,Jamal, Arshad,Fazili, Inayat Saleem,Alam, Tanweer,Khan, Mather Ali,Kamaluddin, Kamaluddin,Iqbal, Mohd,Abdin, Malik Zainul The Korean Society of Crop Science 2007 한국작물학회지 Vol.52 No.2
Field experiments were conducted to determine the physiological and biochemical basis of the interactive effect of sulphur (S) and nitrogen (N) application on seed and xanthotoxin yield of Ammi majus L. Six treatments were tested ($T_1$ = control-without manure and fertilizers, $T_2$ = manure @ 9 kg $plot^{-1}-10\;t\;ha^{-1},\;T_3=A_0N_{50}K_{25}P_{25},\;T_4=S_{40}N_{50}K_{25}P_{25},\;T_5=S_{40}N_{100}K_{25}P_{25}\;T_6=S_{20+20}N_{50+50}K_{25}P_{25})$). Nitrate reductase (NR) activity and ATP-sulphurylase activity in the leaves were measured at various phonological stages, as the two enzymes catalyze rate-limiting steps of the assimilatory pathways of nitrate and sulphate, respectively. The activities of these two enzymes were strongly correlated with seed and xanthotoxin yield. The highest nitrate reductase activity, ATP-sulphurylase activity and xanthotoxin yield were achieved with the treatment $T_4$. Any variation from this treatment decreased the activity of these enzymes, resulting in a reduction of the seed and xanthotoxin yield in Ammi majus L. The higher seed and xanthotoxin yield achieved in Ammi majus L. at treatment $T_4$ could be due to optimization of leaf soluble protein and photosynthetic rate, as these parameters are Influenced by S and N assimilation.
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