Yield Formation in Mediterranean durum wheats under two contrasting water regimes based on path-coefficient analysis

Moral, L. F. García del; Rharrabti, Yahia; Elhani, Sliman; Martos, Vanessa; Royo, C.

doi:10.1007/s10681-005-9006-2

Cited by 46 publications

(41 citation statements)

References 21 publications

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“…This may be attributed to the longer growth cycle of the last crop and to the fact that prolonged period to anthesis exposes plants to unfavourable conditions (increasing temperature in combination with high salinity). When duration of seed maturity is prolonged, seeds growth continues and more assimilates are translocated (Garcia del Moral et al, 2005). Although duration of seed production was highly and positively correlated with seed yield the true effect was low.…”

Section: Discussionmentioning

confidence: 95%

“…Path analysis has the advantage that unveils interrelationships among multiple parameters which may be masked in correlation analysis and as a result the relative importance of the potential causal factors are measured (Whittaker et al, 2009;Ehsani-Moghaddam and De Ell, 2009). Several yield components that have direct bearing on seed or biomass production have been selected and introduced in path analyses (Fellahi et al, 2013;Tripathi et al, 2011;Cyprien and Kumar, 2011;Ali et al, 2008;Garcia del Moral et al, 2005;Subramanian and Subramanian, 1994). The analysis revealed for the current S. bigelovii genotypes that number of seeds per spike, number of branches, days to flowering and duration of seed maturity were characterized by high direct effects which were also reflected in the correlations coefficients.…”

Section: Discussionmentioning

confidence: 99%

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Evaluating the growth performance of eleven Salicornia bigelovii populations under full strength seawater irrigation using multivariate analyses

Lyra¹,

Ismail²,

Butt³

et al. 2016

Aust J Crop Sci

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Halophytes constitute an indispensable part of seawater farming systems implemented in coastal areas of desert lands where they do not compete with good quality land and water resources. Salicornia bigelovii is considered one of the most promising halophytic species that can grow in a biosaline context. However, suitable germplasm needs to be identified, domesticated and improved in order to achieve high yields to compete economically to conventional crops. In the current study, eleven S. bigelovii Torr. populations were evaluated for 22 growth parameters and irrigated with full-strength seawater (SW≈55 dS/m).The study assessed the adaptability of such plant material under the hot and dry climatic conditions that prevail in the Arabian Peninsula. High variation was observed among S. bigelovii populations for most of the characteristics under study. S. bigelovii genotypes were categorized in four groups based on their growth performance and use: for seed production, green biomass as vegetables for human consumption, and biomass as livestock feed; the fourth category was comprised of those halophytic genotypes that demonstrated poor overall performance. Pearson correlation analysis highlighted positive and negative associations among the growth parameters. Path analysis unveiled some interesting interrelationships among growth parameters that could be used for further selection to increase seed production such as number of seeds per spike, number of branches, days to flowering and duration of seed maturity. Plant height and growth cycle could be selected for biomass improvement. The multivariate statistical analyses applied in this study, i.e. clustering, correlation and path analyses were very effective in classifying S. bigelovii genotypes and revealed interrelationships among growth traits that could be selected towards S. bigelovii improvement in terms of seed and biomass yield.

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Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Evaluating the growth performance of eleven Salicornia bigelovii populations under full strength seawater irrigation using multivariate analyses

Lyra¹,

Ismail²,

Butt³

et al. 2016

Aust J Crop Sci

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“…The lowest NKS belonged to G29 (22.94) followed by G21 (27.92) and G18 (29.30). Severe water stress from the seedling stage to maturity reportedly reduced all grain yield components, particularly the number of grain per spike, dry matter and harvest index (Garcia del Moral et al, 2005). J.…”

Section: Analysis Of Variancementioning

confidence: 99%

Relationship Among Agro-Morphological Traits in Bread Wheat (Triticum aestivum) Genotypes Under Irrigated and Rainfed Conditions

Kamrani¹

2015

J. of Agronomy

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A B S T R A C T Drought is the most devastating abiotic stress factor worldwide. It severely limits plant growth and development as well as plant performance. In order to study the effect of drought stress on the relationship among agro-morphological traits, 34 bread wheat genotypes were tested in a randomized complete block design with three replications under irrigated and rainfed conditions during 2012-13 and 2013-14 cropping seasons. The results of combined analysis of variance showed that the effect of environment, genotype and genotype×environment interaction were significant (p<0.01) for all studied traits. Biplot analysis revealed that Harvest Index (HI), Kernel Weight per Spike (KWS), Thousand Kernel Weight (TKW), Flag Leaf Weight (FLW), Flag Leaf Area (FLA), Days to Heading (DTH), Days to Maturity (DTM), Peduncle Length (PL), Plant Height (PH) and Biological Yield (BY) in irrigated and the number of kernel per spike (NKS), chlorophyll content (CHL), FLA, FLW, BY and DTM in rainfed condition had positive effects on Grain Yield (GY). The results of correlation and biplot analyses showed that STI, GMP and MP indices were positively correlated with grain yield under both irrigated and rainfed conditions. Based on the results, the superior wheat genotypes identified were G13 and G7. These genotypes thus may serve as parents for drought tolerance improvement.

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“…TGW strongly, positively and significantly (P ≤ 0.01) correlated with SD at all N levels. Yield components and grain quality depend not only on the fertilization strategy, but also on the weather conditions (Garsia del Moral et al, 2005;Pecio, 2010;Villegas et al, 2010). The interaction between the amount of rainfall, GDD > 5°C, GDD > 10°C and SD in relation to plant growth stage predetermined the variation of yield and yield increase by 85-94% (Janušauskaitė, 2008).…”

Section: Tgw -Thousand Grain Weightmentioning

confidence: 99%

Analysis of grain yield and its components in spring triticale under different N fertilization regimes

Janušauskaitė

2014

Zemdirbyste-Agriculture

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Grain yield is a result of an organized interplay of several yield components, which are highly susceptible to environmental fluctuations. However, there is still a lack of knowledge about the relationship between grain yield and factors governing it. Experiments were conducted during the period 2008-2011 at the Institute of Agriculture, Lithuanian Research Centre for Agriculture and Forestry in Central Lithuania (55023′50″ N and 23051′40″ E) on an Endocalcari-Endohypogleyic Cambisol (CMg-n-w-can). The correlation coefficients and path coefficient analysis was done: i) to study the interrelationship between spring triticale grain yield and its components under different N fertilization regimes, ii) to establish the impact of meteorological factors on them, iii) to explain the causality of associations between the mentioned parameters through direct and indirect effects. Three nitrogen levels were used: i) without nitrogen (N 0 ), ii) N applied as basic fertilization shortly before sowing (N 60-180 ), iii) N 90 and N 150 rates split in two and three applications. Grain yield, yield components (ears m -2 , grains ear -1 , thousand grain weight) and meteorological factors were investigated. The results demonstrated that the interrelationship between grain yield and its components differed between N fertilization levels. Under single N 60-180 fertilization, grain yield of spring triticale depended on ears m -2 and a thousand grain weight. Under split N 90 , N 150 level the yield depended on ears m -2 . The correlation matrix between spring triticale grain yield and yield components did not reveal significant causality at N 0 level. The character of interaction of grain yield components influenced the grain yield by 17.2% and 28.3% at single N 60-180 and split N 90 , N 150 fertilization levels, respectively. However, such interaction was insignificant at N 0 level. The growth and development of spring triticale responded to meteorological conditions more sensitively at single N 60-180 and split N 90 , N 150 levels than at N 0 level. At all N regimes, the weather conditions caused 72.6-83.5% of ears m -2 , 46.6-94.1% of grains ear -1 and 84.5-92.7% of thousand grain weight data variation. The interaction of all meteorological factors influenced the grain yield by 25. 6% and 40.7% at N 60-180 and split N 90 , N 150 levels, respectively.

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Yield Formation in Mediterranean durum wheats under two contrasting water regimes based on path-coefficient analysis

Cited by 46 publications

References 21 publications

Evaluating the growth performance of eleven Salicornia bigelovii populations under full strength seawater irrigation using multivariate analyses

Evaluating the growth performance of eleven Salicornia bigelovii populations under full strength seawater irrigation using multivariate analyses

Relationship Among Agro-Morphological Traits in Bread Wheat (Triticum aestivum) Genotypes Under Irrigated and Rainfed Conditions

Analysis of grain yield and its components in spring triticale under different N fertilization regimes

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