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Ekiz, H.; Kiral, A. Safi; Akcin, A.; Simsek, L.

doi:10.1023/a:1018382106978

Cited by 20 publications

(6 citation statements)

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“…The highly significant effect of cytoplasm on grain weight was consistent with the results of Chandraratna in 1960 [14] and Somrith in 1979 [15], who used the reciprocal crossing method to show that the cytoplasm affects grain weight. Both the nuclear substitution method (ours) and the reciprocal crossing method (Chandraratna's and Somrith's) showed that cytoplasm or cytoplasm-nucleus interactions affected grain weight, which is a major component of yield and grain quality in rice production.…”

Section: Resultssupporting

confidence: 88%

“…In wheat, another crop with a narrow germplasm base narrowed by centuries of breeding, cytoplasmic effects have been demonstrated using both alloplasmic sources (from related species) [13,14] and euplasmic cytoplasm (from other wheat cultivars) [15-17]. Using reciprocal crossing, maternal effects have been reported for several traits in rice, including low temperature tolerance [18], grain weight [19,20], protein content [21,22], chalkiness [23], milling quality traits [24], panicle number [25], plant regeneration rates [26], hybrid vigor [27,28], and crossability [29].…”

Section: Introductionmentioning

confidence: 99%

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Cytoplasm affects grain weight and filled-grain ratio in indica rice

et al. 2011

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BackgroundCytoplasmic effects on agronomic traits -involving cytoplasmic and nuclear genomes of either different species or different cultivars - are well documented in wheat but have seldom been demonstrated in rice (Oryza sativa L.). To detect cytoplasmic effects, we introgressed the nuclear genomes of three indica cultivars - Guichao 2, Jiangchengkugu, and Dianrui 449 - into the cytoplasms of six indica cultivars - Dijiaowujian, Shenglixian, Zhuzhan, Nantehao, Aizizhan, and Peta. These 18 nuclear substitution lines were evaluated during the winter season of 2005 in Sanya, Hainan, China, and during the summer season of 2006 in Kunming, Yunnan, China. The effects of 6 cytoplasm sources, 3 nucleus sources, 2 locations and their interactions were estimated for plant height, panicle length, panicle number per plant, spikelet number per panicle, grain weight, filled-grain ratio, and yield per plot.ResultsFor five of the seven traits, analysis of variance showed that there were no significant cytoplasmic effects or interactions involving cytoplasmic effects. The effect of cytoplasm on 1000-grain weight was highly significant. Mean 1000-grain weight over the two locations in four of the six cytoplasms clustered close to the overall mean, whereas plants with Nantehao cytoplasm had a high, and those with Peta cytoplasm a low mean grain weight. There was a highly significant three-way interaction affecting filled-grain ratio. At Sanya, cytoplasms varied in very narrow ranges within nuclear backgrounds. Strong cytoplasmic effects were observed only at Kunming and in only two of the three nuclear backgrounds; in the Jianchenkugu nuclear background, there was no evidence of strong cytoplasmic effects at either location. In the Dianrui 449 and Guichao 2 nuclear background evaluated at Kunming, filled-grain ratios of the six cytoplasms showed striking rank shiftsConclusionsWe detected cytoplasmic variation for two agronomically important traits in indica rice. The cytoplasm source had a significant effect on grain weight across the two experimental locations. There was also a significant cytoplasmic effect on filled-grain ratio, but only in two of three nuclear background and at one of the two locations. The results extend our previous findings with japonica rice, suggesting that the selection of appropriate cytoplasmic germplasm is broadly important in rice breeding, and that cytoplasmic effects on some traits, such as filled-grain ratio, cannot be generalized; effects should be evaluated in the nuclear backgrounds of interest and at multiple locations.

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Section: Resultssupporting

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Cytoplasm affects grain weight and filled-grain ratio in indica rice

et al. 2011

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“…Additive gene action was revealed after the computation of variance components because GCA variances turn out to be much higher than the SCA variance (Table 4). These results are in accordance with the observations by Ekiz et al (1998) and Topal et al (2004). IQ-2000 proved to be the best combiner (Table 5) with the highest GCA effects (1.14) followed by 9481 and 9486 with the values of (0.98) and (0.80), respectively.…”

Section: Grain Weight (Gw)supporting

confidence: 91%

Genetic analysis of yield and physical traits of spring wheat grain

Ahmed¹,

Khan²,

Kashif³

et al. 2018

J. Natn. Sci. Foundation Sri Lanka

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The economic value of wheat grain is determined by morphology, texture and size of grain. Very little knowledge is available about the genetic inheritance pattern of the physical characteristics of wheat grain. The mechanical properties of wheat kernel have direct or indirect link on the milling and baking quality of wheat. Six bread wheat genotypes/lines were crossed in all possible combinations in order to assess the physical properties. Additive type of gene action was involved in number of spikelets per spike, spike length, number of grains per spike, grain weight and grain area. Therefore, selection of superior plants can be done in early generations for development of better wheat genotypes. Grain yield per spike, grain width, grain length, grain height and grain sphericity having nonadditive type of gene actions clearly indicated that selection of superior plants should be postponed to later generations. The genotype 9481 was the best general combiner, while among the combining ability in most of the prominent traits. This study will be useful for wheat breeders to develop high yielding genotypes with better grain architecture to improve the milling and baking quality of bread wheat.

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“…For example, disease resistance can be influenced by the genotype of the cytoplasm (plasmotype), as can be yield and grain quality (Frei, Peiretti, & Wenzel, 2003;Sanetomo & Gebhardt, 2015). These traits are likely the result of local adaption of the original wild alleles, as shown for bread wheat (Trictium aestivum), where cytoplasmic influence on fruit quality is influenced by genotype-byenvironment interactions (Ekiz, Kiral, Akçin, & Simsek, 1998;Frei et al, 2003). Vis-à-vis regulation of the circadian clock rhythm, it was shown that mutations in nuclear-encoded chloroplast proteins (GUN1), known to be involved in retrograde signalling, or in mRNA maturation in the chloroplast, feed back into the nucleus and affect the expression of both circadian clock oscillator (e.g., CCA1) and output genes (CAB; Hassidim et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Thermal plasticity of the circadian clock is under nuclear and cytoplasmic control in wild barley

Bdolach

Prusty

Faigenboim-Doron

et al. 2019

Plant Cell & Environment

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Temperature compensation, expressed as the ability to maintain clock characteristics (mainly period) in face of temperature changes, that is, robustness, is considered a key feature of circadian clock systems. In this study, we explore the genetic basis for lack of robustness, that is, plasticity, of circadian clock as reflected by photosynthesis rhythmicity. The clock rhythmicity of a new wild barley reciprocal doubled haploid population was analysed with a high temporal resolution of pulsed amplitude modulation of chlorophyll fluorescence under optimal (22°C) and high (32°C) temperature. This comparison between two environments pointed to the prevalence of clock acceleration under heat. Genotyping by sequencing of doubled haploid lines indicated a rich recombination landscape with minor fixation (less than 8%) for one of the parental alleles. Quantitative genetic analysis included genotype by environment interactions and binary‐threshold models. Variation in the circadian rhythm plasticity phenotypes, expressed as change (delta) of period and amplitude under two temperatures, was associated with maternal organelle genome (the plasmotype), as well as with several nuclear loci. This first reported rhythmicity driven by nuclear loci and plasmotype with few identified variants, paves the way for studying impact of cytonuclear variations on clock robustness and on plant adaptation to changing environments.

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Cited by 20 publications

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Cytoplasm affects grain weight and filled-grain ratio in indica rice

Cytoplasm affects grain weight and filled-grain ratio in indica rice

Genetic analysis of yield and physical traits of spring wheat grain

Thermal plasticity of the circadian clock is under nuclear and cytoplasmic control in wild barley

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