Low straw phosphorus concentration is beneficial for high phosphorus use efficiency for grain production in rice recombinant inbred lines

2017 ◽  
Vol 203 ◽  
pp. 65-73 ◽  
Author(s):  
Kai Wang ◽  
Kehui Cui ◽  
Guoling Liu ◽  
Xina Luo ◽  
Jianliang Huang ◽  
...  
Keyword(s):  
Recombinant Inbred ◽  
Recombinant Inbred Lines ◽  
Inbred Lines ◽  
Phosphorus Concentration ◽  
Grain Production ◽  
Phosphorus Use Efficiency ◽  
High Phosphorus ◽  
Use Efficiency

Variability in gas exchange attributes of wheat RILs subjected to high temperature stress

2017 ◽  
Vol 37 (03) ◽  
Author(s):  
Sunita . ◽  
Renu Munjal
Keyword(s):  
High Temperature ◽  
Stomatal Conductance ◽  
Water Use ◽  
Transpiration Rate ◽  
Recombinant Inbred ◽  
Recombinant Inbred Lines ◽  
Inbred Lines ◽  
Use Efficiency ◽  
Heat Tolerant ◽  
Days After Anthesis

High temperature above the optimum has a drastic effect on the stomatal activity and gaseous exchange which ultimately affect the yield and yield attributing traits. In this study, the Net photosynthetic rate (An), stomatal conductance (gs), transpiration rate (E), and intrinsic water use efficiency (iWT) on flag leaves of 100 recombinant inbred lines of bread wheat derived from the cross of WH1021 (heat-tolerant) and WH711 (heat-sensitive) were evaluated. Recombinant inbred lines and both parents were assessed for various gas attributes under two sowing dates i.e., normal (17.11.2015) and late sowing (27.12.2015). The temperature persisted normal from December, 2015 to February, 2016 and there was a consistent rise in temperature in the last week of March. Measurements were made at anthesis and 10 days after anthesis. Average An, E, gs and iWT decreased as the temperature increase. A contrasting difference was observed in timely sown and late sown at 10 days after anthesis for photosynthetic rate and transpiration rate. Decrease in stomatal conductance and water use efficiency was found with delayed sowing and high temperature. There results may prove useful in the selection of physiologically efficient heat-tolerant genotypes with higher rate of photosynthesis.

Diverse sources of resistance to Spodoptera litura (F.) in groundnut

2019 ◽  
Vol 79 (01S) ◽  
Author(s):  
M. A. Saleem ◽  
G. K. Naidu ◽  
H. L. Nadaf ◽  
P. S. Tippannavar
Keyword(s):  
Recombinant Inbred ◽  
Spodoptera Litura ◽  
Hot Spot ◽  
Recombinant Inbred Lines ◽  
Insect Pest ◽  
Inbred Lines ◽  
Leaf Damage ◽  
Botanical Variety ◽  
Resistant Genotypes ◽  
Botanical Varieties

Spodoptera litura an important insect pest of groundnut causes yield loss up to 71% in India. Though many effective chemicals are available to control Spodoptera, host plant resistance is the most desirable, economic and eco-friendly strategy. In the present study, groundnut mini core (184), recombinant inbred lines (318) and elite genotypes (44) were studied for their reaction to Spodoptera litura under hot spot location at Dharwad. Heritable component of variation existed for resistance to Spodoptera in groundnut mini core, recombinant inbred lines and elite genotypes indicating scope for selection of Spodoptera resistant genotypes. Only 29 (15%) genotypes belonging to hypogaea, fastigiata and hirsuta botanical varieties under mini core set, 15 transgressive segregants belonging to fastigiata botanical variety among 318 recombinant inbred lines and three genotypes belonging to hypogaea and fastigiata botanical varieties under elite genotypes showed resistance to Spodoptera litura with less than 10% leaf damage. Negative correlation existed between resistance to Spodoptera and days to 50 per cent flowering indicating late maturing nature of resistant genotypes. Eight resistant genotypes (ICG 862, ICG 928, ICG 76, ICG 2777, ICG 5016, ICG 12276, ICG 4412 and ICG 9905) under hypogaea botanical variety also had significantly higher pod yield. These diverse genotypes could serve as potential donors for incorporation of Spodoptera resistance in groundnut.

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