Variance for water-use efficiency among ecotypes and recombinant inbred lines of A rabidopsis thaliana (Brassicaceae)

1994 ◽  
Vol 81 (8) ◽  
pp. 943-947 ◽  
Author(s):  
James Nienhuis ◽  
Gavin R. Sills ◽  
Bjorn Martin ◽  
Gretchen King
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Recombinant Inbred ◽  
Recombinant Inbred Lines ◽  
Inbred Lines ◽  
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.

scholarly journals Morpho-physiological combining ability among tropical and temperate maize germplasm for drought tolerance

Genetika ◽  
2016 ◽  
Vol 48 (3) ◽  
pp. 1053-1066
Author(s):  
Sekip Erdal ◽  
Mehmet Pamukcu ◽  
Ahmet Ozturk ◽  
Koksal Aydinsakir ◽  
Yilmaz Dogu
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Combining Ability ◽  
Resistance Index ◽  
Inbred Lines ◽  
Tolerance Index ◽  
Drought Tolerant ◽  
Maize Inbred Lines ◽  
Diallel Mating Design ◽  
Use Efficiency

In this study, seven maize inbred lines representing different tropical, drought tolerant populations and two adapted temperate maize inbred lines were crossed in a half-diallel mating design to determine combining abilities. The genotypes were tested in well-watered (WW) and managed water stressed (WS) conditions in 2013 and 2014. General combining ability (GCA) and specific combining ability (SCA) mean squares were significant for all investigated traits and demonstrated both additive and non-additive genetic effects in both conditions. Higher desired leaf rolling, leaf senescence, stomatal conductance and leaf chlorophyll content GCA effects of tropical inbreds under WS conditions showed the presence of the valuable allels related to drought stress. SCA analysis revealed that the best hybrids for water use efficiency and irrigation water use efficiency were tropical x temperate crosses. Stress tolerance index and drought resistance index identified G5 x G9, a tropical x temperate hybrid, as the most tolerant hybrid to drought. Our study suggests that tropical drought tolerant germplasm has the potential to contribute useful genetic diversity to temperate maize breeding programs.

Soil inoculation with Burkholderia sp. LD-11 has positive effect on water-use efficiency in inbred lines of maize

2015 ◽  
Vol 390 (1-2) ◽  
pp. 337-349 ◽  
Author(s):  
Xianwei Fan ◽  
Haiyang Hu ◽  
Guiyuan Huang ◽  
Feiyan Huang ◽  
Youzhi Li ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Inbred Lines ◽  
Soil Inoculation ◽  
Use Efficiency ◽  
Positive Effect

scholarly journals Water Use Efficiency in Popcorn (Zea mays L. var. everta): Which Physiological Traits Would Be Useful for Breeding?

Plants ◽  
2021 ◽  
Vol 10 (7) ◽  
pp. 1450
Author(s):  
Jhean Torres Leite ◽  
Antonio Teixeira do Amaral Junior ◽  
Samuel Henrique Kamphorst ◽  
Valter Jário de Lima ◽  
Divino Rosa dos Santos Junior ◽  
...  
Keyword(s):  
Water Use Efficiency ◽  
Water Use ◽  
Chlorophyll Concentration ◽  
Dry Weight ◽  
Co2 Assimilation ◽  
Inbred Lines ◽  
Experimental Unit ◽  
Root Angle ◽  
Net Co2 Assimilation ◽  
Use Efficiency

To ensure genetic gains in popcorn breeding programs carried out under drought conditions knowledge about the response of morphophysiological traits of plants to water stress for the selection of key traits is required. Therefore, the objective was to evaluate popcorn inbred lines with agronomically efficient (P2 and P3) and inefficient (L61 and L63) water use and two hybrids (P2xL61 and P3xL63) derived from these contrasting parents, cultivated under two water regimes (WW watered—WW; and water-stressed—WS) in a greenhouse, replicated five times, where each experimental unit consisted of one plant in a PVC tube. Irrigation was applied until stage V6 and suspended thereafter. Individual and combined analyses of variance were performed and the genotypic correlations and relative heteroses estimated. The water use efficient inbred lines were superior in root length (RL), root dry weight (RDW), and net CO2 assimilation rate (A), which were the characteristics that differentiated the studied genotypes most clearly. High heterosis estimates were observed for RL, SDW, leaf width (LW), leaf midrib length (LL), and agronomic water use efficiency (AWUE). The existence of a synergistic association between root angle and length for the characteristics A, stomatal conductance (gs), and chlorophyll concentration (SPAD index) proved most important for the identification and phenotyping of superior genotypes. Based on the study of these characteristics, the higher AWUE of the previously selected inbred lines could be explained. The results reinforced the importance of root physiological and morphological traits to explain AWUE and the possibility of advances by exploiting heterosis, given the morphophysiological superiority of hybrids in relation to parents.

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