Genetic Diversity Assessment of Iranian Kentucky Bluegrass Accessions: II. Nuclear DNA Content and Its Association with Morphological and Geographical Features

Ghanbari, Mehdi; Salehi, H.; Jowkar, Abolfazl

doi:10.1007/s12033-022-00534-9

Cited by 4 publications

(2 citation statements)

References 44 publications

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“…The extent to which a plant relies on a mixed reproduction system is speciesspecific, but it can also change over time and in response to environmental stressors to maximize reproductive success [7]. For example, Kentucky bluegrass is remarkably adaptive due to a wide range of chromosomal numbers and sexual and apomictic reproductive diversity [8]. Successful anther and ovule development are required for stable plant reproduction, and abnormal development can lead to reproductive failure [9].…”

Section: Introductionmentioning

confidence: 99%

Cyto-Embryological Analysis of Wild Kentucky Bluegrass Germplasm in Gansu Province, China

Zhang

2023

Agronomy

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Reproduction studies, particularly embryology, represent basic information of any plant. However, the current embryological information is fragmentary for Kentucky bluegrass (Poa pratensis L.). Here, paraffin sections were used to examine the cyto-embryological characteristics, including microsporogenesis, microgametogenesis, megasporogenesis, megagametogenesis, and apomixis, of wild Kentucky bluegrass germplasm from Gannan (GN) and Longnan (LN) in Gansu Province. The study found no significant differences in pollen diameter, characteristics, viability, and stigma receptivity between the two germplasm materials. The Kentucky bluegrass consisted of three anthers, and each contained four pollen sacs that were divided into left and right halves. After meiosis, the microspore mother cells formed dyads and tetrads, which were primarily symmetrical and underwent mitosis to form three-celled pollen. Kentucky bluegrass has a one-locular ovary, two-feathery stigmas, thick nucleolar and anatropous ovules, and a typical polygonum embryo sac as its reproductive organs. The main type of apomixis observed was apospory, resulting in the coexistence of multiple embryo sacs. Polyembryonic seeds were frequently observed in Kentucky bluegrass due to apospory. Most importantly, our research found that apospory caused early embryogenesis during fertilization, which is a vital embryological feature for identifying sexual reproduction and apomixis in Kentucky bluegrass. Sexual reproduction followed strict double fertilization, while in apomixis a complete seed was only formed through pseudogamy. These embryological characteristics are documented here, and their study can aid in understanding the evolution of Kentucky bluegrass.

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Section: Introductionmentioning

confidence: 99%

Cyto-Embryological Analysis of Wild Kentucky Bluegrass Germplasm in Gansu Province, China

Zhang

2023

Agronomy

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“…In addition, P. pratensis is more drought tolerant than many other grass species, which makes it a suitable candidate forage crop in arid and semi-arid areas. Previous studies determined that P. pratensis has a native distribution that spans different climatic regions of Iran, especially in the western and northern regions along the Zagros and Alborz Mountain ranges (Shariatipour et al, 2022;Ghanbari et al, 2023). The profusion of potential Kentucky bluegrass ecotypes provides high phenotypic and genotypic diversity for better stability against the adverse climate change effects (Shariatipour et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Genetic variation and response to selection of photosynthetic and forage characteristics in Kentucky bluegrass (Poa pratensis L.) ecotypes under drought conditions

Shariatipour,

Shams,

Heidari

et al. 2023

Front. Plant Sci.

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IntroductionEvaluation of the effects of water-limited conditions on the photosynthetic characteristics and forage yield is important for enhancing the forage productivity and drought tolerance in Kentucky bluegrass (Poa pratensis L.).MethodsIn the present study, 100 P. pratensis ecotypes collected from different geographical areas in Iran were assessed under well-watered and drought stress conditions. Genetic variation and response to selection for the photosynthetic characteristics [i.e., net photosynthesis rate (A), stomatal conductance (gs), transpiration rate (Tr), chlorophyll content (Chl), and photochemical efficiency (Fv/Fm)] and forage yield [fresh forage yield (FY) and dry forage yield (Dy)] traits were analyzed during the 2018 and 2019 growing seasons.Results and discussionDrought stress had negative effects on evaluated photosynthesis parameters and significantly reduced dry and fresh forage yields. On average, FY with a 45% decrease and gs with a 326% decrease under drought stress conditions showed the highest reduction rate among forage yield and photosynthesis traits, respectively. Genotypic coefficients of variation (GCV) for FY were lower under drought stress. The estimates of heritability, genetic advance, and genetic advance as percentage of mean showed the predominance of additive gene action for the traits. Overall, the results showed that “Ciakhor”, “Damavand”, “Karvandan”, “Basmenj”, “Abr2”, “Abrumand”, “Borhan”, “Hezarkanian”, “LasemCheshmeh”, “Torshab”, and “DoSar” have higher forage yield production with little change between two irrigation regimes, which makes them promising candidates for developing high-yielding drought-tolerant varieties through breeding programs.

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Genetic resources diversity of tea (Camellia sinensis (L.) Kuntze) in the southern region of the Caspian Sea

Montahae Dargah,

Rezaei,

Ghanbari Jahromi

et al. 2023

Plant Genet. Resour.

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In the fields of agricultural, food and medical research, the potential impacts of tea on human health are of special interest because tea (Camellia sinensis (L.) Kuntze) is continuously consumed by many people in the world. The evaluation of the diversity of genotypes found in tea germplasm can aid in the improvement of the breeding programme. In this study, the genetic diversity of 30 tea genotypes from two commercial sites of tea production in Iran was investigated by using morphological and 12 ISSR markers. Morphological analysis showed that the diversity between samples of tea was limited, and the narrow matching range was calculated. In cluster analysis at level 0.63, samples were divided into four groups. The application of 12 ISSR primers produced 91 polymorphic bands. PIC test showed a range of 0.41–0.48. Based on the ISSR data, the matching range was obtained in the range of 0.24–0.93. In cluster analysis, samples at level 0.58 were divided into five groups. According to the results, it can be understood that these series of traits and primers can very well recognize genetic differences. Using these markers, genetic diversity was observed among tea genotypes, but this diversity was not such as to be able to separate genotypes of various regions from each other. The results showed that the tea genotypes in Iran had high genetic diversity. As a consequence, the findings of our study will help the development of tea germplasm conservation strategies and their sustainable use in breeding programmes.

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Genetic Diversity Assessment of Iranian Kentucky Bluegrass Accessions: II. Nuclear DNA Content and Its Association with Morphological and Geographical Features

Cited by 4 publications

References 44 publications

Cyto-Embryological Analysis of Wild Kentucky Bluegrass Germplasm in Gansu Province, China

Cyto-Embryological Analysis of Wild Kentucky Bluegrass Germplasm in Gansu Province, China

Genetic variation and response to selection of photosynthetic and forage characteristics in Kentucky bluegrass (Poa pratensis L.) ecotypes under drought conditions

Genetic resources diversity of tea (Camellia sinensis (L.) Kuntze) in the southern region of the Caspian Sea

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