Variations and heritability of phenotypic characters in the reblooming bearded iris (Iris germanica L.)

Fan, Zhuping; Gao, Yu; Liu, Rong; Wang, Shiting; Guo, Y. S.; Zhang, Qixiang

doi:10.1016/j.scienta.2021.110844

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…The selection of specific traits can lead to the indirect selection of other correlated traits, potentially constraining the response of the desired trait (Conner, 2002;Fan et al, 2017Fan et al, , 2022Majidi et al, 2009) and interfering with evolutionary Crop Science changes and selection processes for associated traits (Deng et al, 1999). Nevertheless, in certain cases, simultaneous selection of correlated traits can be beneficial (Chen & Lübberstedt, 2010).…”

Section: Phenotypic Genotypic and Environmental Correlationsmentioning

confidence: 99%

Heritability of floral traits in Allium cepa L. populations from biparental crosses

Noguera Serrano,

Gimenez,

Paz

et al. 2024

Crop Science

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Onions (Allium cepa L.) are one of the main vegetable crops worldwide. As an allogamous species with entomophilous pollination, floral traits play a critical role in seed production. Improving seed yield, especially for hybrid seed production, is very important. In this work, we obtained genetic information for floral traits using segregating populations from three male‐sterile lines and one open‐pollinated variety. Data on 16 floral traits, including perianth, gynoecium, stamens, and receptacle structures, were collected from the parental cultivars, their hybrids, and from segregating populations in the F2 and F3 generations. This dataset underpinned a comprehensive analysis of genetic variability, broad‐ and narrow‐sense heritability estimation, genetic gain predictions, and trait correlations. The evaluated traits exhibited high broad‐sense heritability values (0.08–0.85), but moderate narrow‐sense heritability values (0.01–0.68), implying that the observed phenotypic variance is mainly explained by genetic factors, with a minor additive genetic factors contribution. Consequently, the study revealed effective genetic gain for the analyzed traits. The phenotypic correlations observed in the parental cultivars were not always maintained in the segregating populations, suggesting random correlations. Meanwhile, genetic correlations were moderate to low, suggesting that the analyzed traits can be independently selected without affecting the expression of other floral traits. Notably, correlations among floral traits were significant in stable cultivars but weak in segregating populations, excluding pleiotropic effects. This work has successfully demonstrated the heritability of onion floral traits and provided a sound basis for selecting individuals with desirable attributes, with valuable practical implications for onion breeding and seed production.

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Section: Phenotypic Genotypic and Environmental Correlationsmentioning

confidence: 99%

Heritability of floral traits in Allium cepa L. populations from biparental crosses

Noguera Serrano,

Gimenez,

Paz

et al. 2024

Crop Science

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“…At present, the research of Iris germanica mainly focuses on the determination of physiological and biochemical indicators under abiotic stress ( Bo et al, 2017 ; Zhao et al, 2021 ), hybrid breeding ( Azimi and Alavijeh, 2021 ), phenotype analysis ( Fan et al, 2022 ), and exploration of flowering mechanism ( Fan et al, 2020 ). There are few studies on stress-resistant genes, and they are limited to the detection of gene expression ( Wang et al, 2021 ), and the function of gene has not been verified.…”

Section: Introductionmentioning

confidence: 99%

Drought-responsive WRKY transcription factor genes IgWRKY50 and IgWRKY32 from Iris germanica enhance drought resistance in transgenic Arabidopsis

et al. 2022

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Drought greatly affects the growth and development of garden plants and affects their ornamental value. WRKY transcription factors make up one of the largest transcription factor families in plants and they play an important role in the plant response to drought stress. However, the function of the WRKY gene in response to drought stress in Iris germanica, which is commonly used in landscaping, has not been studied. In this study, we isolated two WRKY transcription factor genes from Iris germanica, IgWRKY50 and IgWRKY32, which belong to Group II and Group III of the WRKY family, respectively. IgWRKY50 and IgWRKY32 could be induced by PEG-6000, high temperature and ABA in Iris germanica. IgWRKY50 and IgWRKY32 could quickly respond to drought and they peaked at 3 h after PEG-6000 treatment (19.93- and 23.32-fold). The fusion proteins IgWRKY50-GFP and IgWRKY32-GFP were located in the nucleus of mesophyll protoplasts of Arabidopsis. The overexpression of the IgWRKY50 and IgWRKY32 genes improved the osmotic tolerance of transgenic Arabidopsis, mainly exhibited by the transgenic plants having a higher germination rate and a longer total root length on 1/2 MS medium containing mannitol. Under PEG-6000 stress, the transgenic plants had higher stomatal closure than the wild type (WT). Under natural drought stress, the water loss rate of the isolated leaves of transgenic Arabidopsis was lower than that of WT, the contents of proline (Pro) and soluble protein (SP) and the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) in the transgenic plants were higher, but the content of malondialdehyde (MDA) was lower. Furthermore, the expression of several stress-related genes (RD29A, DREB2A, PP2CA, and ABA2) was significantly increased in IgWRKY50- and IgWRKY32- overexpressing transgenic Arabidposis plants after drought treatment. These results suggest that IgWRKY50 and IgWRKY32, as two positive regulators, enhance the drought resistance of transgenic Arabidopsis by mediating the ABA signal transduction pathway. IgWRKY50 and IgWRKY32 can be used as candidate genes for molecular breeding of drought resistance in Iris.

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“…The hybrid plants showed a significant negative hybrid advantage in height, flower diameter and number of florets were reduced, but the overall ornamental traits of the populations were greatly different (Yang et al 2015). In bearded iris (Iris Germanica L.) hybrid progeny, in the FM2 × M2 (I. germanica 'Delta Lady' × I. germanica 'HD') hybrid combination, six flower characteristics (single flower height (HF), flower diameter (DF), fall length (LF), fall width (WF), standard length (LS) and standard width (WS)) were varied compared to the two parents (Fan et al 2022). In this study, the pink 'Rhododendron pulchurum 'Wan Xia' was crossed with the paternal white 'Rhododendron hybridum Hot' to create a group of hybrid progeny plants, and then the genetic diversity of the seprogeny plants was analyzed by combining examinations on both quantitative and qualitative traits.…”

Section: Introductionmentioning

confidence: 99%

Traits and anthocyanin genetic characteristics of the progeny of crosses between white 2 azalea 'Rhododendron hybridum Hot' and pink Rhododendron pulchurum 'Wan Xia'

Jiang

Wang

Yang

et al. 2022

Preprint

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Rhododendron is a world-famous ornamental flower with an abundance of genetic resources for producing different flower color varieties through breeding. However, the lack of genetic knowledge involved mechanisms behind the flower color formation have hindered the breeding process. In this study, a cross was made between the female pink Rhododendron pulchurum 'WanXia' and the male white 'Rhododendron hybridum Hot'. A total of 61 hybrid progenies with four different flower colors including white, pink, rose and red were produced and analyzed to identify the inheritance pattern of flower color as well as their genetic diversity in the whole group. The results of the combined qualitative and quantitative trait analysis disclosed that the germplasm resources in the hybrid progeny plants were genetically enriched, which can provide an excellent germplasm for screening and breeding new Rhododendron varieties. The anthocyanin-3-O-glucoside (Cy3G) contents of hybrid progeny petals were measured using high performance liquid chromatography-mass spectrometry (HPLC-MS). The total anthocyanin (TA) contents were calculated by first developing a linear equation (y=36.52x-59.18, R2=0.998) with anthocyanin-3-O-glucoside (Cy3G) specimens. The results revealed that TA was positively and significantly correlated with the color parameter a* values as the flower color of the hybrid progeny was gradually deepened from white to red. The value of parameter L* was gradually decreased, while a*, C* and TA contents were gradually increased. L* displayed to be both significantly and negatively correlated with a*, C*and TA contents. From the trait characteristics of each progeny plants, it was observed that No.52 Pink azalea has the highest pedicel length and petal number, while No.37 Red 2 azalea has the highest corolla lobe length, corolla lobe width and TA content. Our findings indicate that it may be feasible to breed Rhododendron varieties with new flower colors based on width and TA content. In conclusion, our outcomes propose that there is probability to produce Rhododendron varieties with new flower colors by crossing and screening hybrid progenies.

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Variations and heritability of phenotypic characters in the reblooming bearded iris (Iris germanica L.)

Cited by 4 publications

References 13 publications

Heritability of floral traits in Allium cepa L. populations from biparental crosses

Heritability of floral traits in Allium cepa L. populations from biparental crosses

Drought-responsive WRKY transcription factor genes IgWRKY50 and IgWRKY32 from Iris germanica enhance drought resistance in transgenic Arabidopsis

Traits and anthocyanin genetic characteristics of the progeny of crosses between white 2 azalea 'Rhododendron hybridum Hot' and pink Rhododendron pulchurum 'Wan Xia'

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