Natural allelic variation at seed size loci in relation to other life history traits of<i>Arabidopsis thaliana</i>

Alonso‐Blanco, Carlos; Vries, Hetty Blankestijn-de; Hanhart, C.J.; Koornneef, M.

doi:10.1073/pnas.96.8.4710

Cited by 257 publications

(276 citation statements)

References 58 publications

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“…A linear correlation between the length of the silique and the number of seeds per silique was observed ( Figure 1C; r 2 = 0.90). Such a high correlation has also been reported previously for accessions Landsberg erecta and Cape Verde Islands (Alonso-Blanco et al, 1999). The reduction in silique length is predominantly caused by fewer seeds per silique rather than by smaller seeds.…”

Section: Quantification Of Heat Stress Response By Determination Of Ssupporting

confidence: 65%

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Genome-Wide Association Mapping of Fertility Reduction upon Heat Stress Reveals Developmental Stage-Specific QTLs in Arabidopsis thaliana

et al. 2015

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ORCID ID: 0000-0001-8918-0711 (J.J.B.K.)For crops that are grown for their fruits or seeds, elevated temperatures that occur during flowering and seed or fruit set have a stronger effect on yield than high temperatures during the vegetative stage. Even short-term exposure to heat can have a large impact on yield. In this study, we used Arabidopsis thaliana to study the effect of short-term heat exposure on flower and seed development. The impact of a single hot day (35°C) was determined in more than 250 natural accessions by measuring the lengths of the siliques along the main inflorescence. Two sensitive developmental stages were identified, one before anthesis, during male and female meiosis, and one after anthesis, during fertilization and early embryo development. In addition, we observed a correlation between flowering time and heat tolerance. Genome-wide association mapping revealed four quantitative trait loci (QTLs) strongly associated with the heat response. These QTLs were developmental stage specific, as different QTLs were detected before and after anthesis. For a number of QTLs, T-DNA insertion knockout lines could validate assigned candidate genes. Our findings show that the regulation of complex traits can be highly dependent on the developmental timing.

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Section: Quantification Of Heat Stress Response By Determination Of Ssupporting

confidence: 65%

“…Total yield is determined by several plant traits, such as total fruits per plant, seed weight, seeds per fruit, and fruit length. The last three are correlated and many coinciding QTLs have been reported (Alonso-Blanco et al, 1999;Dechaine et al, 2014;N. Li et al, 2014).…”

Section: Homology Of Heat Stress Responses Between Speciesmentioning

confidence: 99%

Genome-Wide Association Mapping of Fertility Reduction upon Heat Stress Reveals Developmental Stage-Specific QTLs in Arabidopsis thaliana

et al. 2015

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“…But even for truly identical traits, QTLs of small effect are often not consistently detected over replicate experiments because of sampling effects and limited statistical power (Beavis 1994). The combined results of the studies using the AQ 3 ME mapping population strongly indicate that seed mass variation is controlled by many genes of modest effect, which is similar to the genetic control of seed mass in Arabidopsis thaliana (Alonso-Blanco et al 1999), with mass-increasing alleles at nearly all polymorphic loci brought together in the AQ genotype.…”

Section: Qtl Evidencementioning

confidence: 86%

Can a Genetic Correlation with Seed Mass Constrain Adaptive Evolution of Seedling Desiccation Tolerance in Wild Barley?

Verhoeven¹,

Biere

Nevo

et al. 2004

International Journal of Plant Sciences

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Very young seedlings of wild barley Hordeum spontaneum have the ability to survive extended periods of severe drought. This desiccation tolerance is considered an adaptation to the rain-limited and unpredictable habitats that the species occupies. Genetic variation has been observed for this trait, but the limited evidence to date does not consistently show that genotypes from more xeric populations have better desiccation tolerance. As large seed endosperm volume may buffer the desiccating seedling from drought stress, we explored the hypothesis that tolerance to temporary but severe drought is affected by seed mass. We crossed a big-seeded with a small-seeded H. spontaneum genotype and measured seed mass and seedling survival rates after 6-d desiccation in 140 F 4 progeny families. A positive correlation was observed between family mean scores of the two traits. At the genetic level, this indicated that at least some genes underlying variation in the two traits overlapped (or show close chromosomal linkage), which is inevitable if seed mass causally affects desiccation tolerance. Quantitative Trait Loci (QTL) analysis, which can identify chromosome regions responsible for trait variation by exploring associations between trait expression and genetic markers dispersed over the genome, did not confirm this hypothesis of shared genetic control. Despite the lack of QTL evidence, the observed genetic association between seed mass and desiccation tolerance indicates that the two traits are not fully independent, implying that selection targeting one trait will cause a correlated response in the other. We discuss this finding in the context of adaptive differentiation of H. spontaneum populations, which is thought to involve selection of increasingly smaller seeds along a gradient of decreasing predictability and amount of annual precipitation.

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“…Ecotypes of Arabidopsis also exhibit variations in seed mass and seeds of the Cape Verde Island ecotype are almost double the weight of those of Ler (Landsberg erecta) (Alonso-Blanco et al, 1999). It is generally agreed that species exposed to more stressful environments such as shade or drought preferentially produce larger seeds (Leishman and Westoby, 1994).…”

Section: Variation In Seed Size and Growth Processmentioning

confidence: 99%

Ecotypic differentiation in seed and seedling morphology and physiology among Cicuta virosa populations

Shin

Kim

2013

Aquatic Botany

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a b s t r a c tThere are three different Cicuta virosa habitats in Korea: Pyeongchang (PC), a fenced wet meadow with a water shortage in spring; Hoengseng (HS), a 12 year old abandoned paddy field and narrow streamlet holding shallow water throughout the year; Gunsan (GS), a 1 m deep reservoir with a floating mat composed of organic matter located 2 • south of HS and PC and at very low altitude. These three populations with different altitudes, climates, water regimes and nutrient availability showed differences in leaf morphology and flowering time. We compared seed and seedling morphology and tested the sensitivity of seedlings to dryness and shade and the germination responses to light and temperature to identify intraspecific variation as ecotypic differences in C. virosa populations (p ≤ 0.05). The seed length of GS (2.04 ± 0.03 mm) was significantly shorter than that of PC (2.44 ± 0.05 mm) and HS (2.60 ± 0.03 mm). Seed weight of GS (0.83 ± 0.01 mg) was significantly lighter than that of the others (PC: 1.47 ± 0.02 mg, HS: 1.33 ± 0.02 mg). PC and HS seedlings had larger root: shoot ratio values and GS had significantly higher relative growth rate (RGR) through 8 weeks of growth. GS seedlings were more sensitive to dryness than PC and HS in leaf chlorophyll contents, specific leaf area (SLA) and RGR. The pattern of germination responses was similar among the three populations but germination rate (%) was very different. Maximum germination percentages were 63.0%, 23.9% and 96.9% in PC, HS, and GS, respectively, under 28/18 • C/14 h photoperiod. The nonviable seed (%) of GS (18.1 ± 0.7%) was significantly higher than that of the others (PC: 3.1 ± 1.6%, HS: 3.4 ± 0.6%) in the tetrazolium tests result. Seed mass which was correlated to other plant traits (i.e., root:shoot ratio, RGR) and germination rate were the most discriminating variables in the discriminant analysis. Seed weight was negatively correlated with temperature in January and water level and germination rate was significantly related with water level and water temperature in August. Based on these results under uniform conditions, we suggest that these three C. virosa populations from different habitats are ecotypes.

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Natural allelic variation at seed size loci in relation to other life history traits ofArabidopsis thaliana

Cited by 257 publications

References 58 publications

Genome-Wide Association Mapping of Fertility Reduction upon Heat Stress Reveals Developmental Stage-Specific QTLs in Arabidopsis thaliana

Genome-Wide Association Mapping of Fertility Reduction upon Heat Stress Reveals Developmental Stage-Specific QTLs in Arabidopsis thaliana

Can a Genetic Correlation with Seed Mass Constrain Adaptive Evolution of Seedling Desiccation Tolerance in Wild Barley?

Ecotypic differentiation in seed and seedling morphology and physiology among Cicuta virosa populations

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