Genetic variability of maternal plants and embryos of their seeds in the populations of Pinus kochiana Klotzsch ex Koch in Crimea

Korshykov, I.I.; Kalafat, L. O.; Vynogradova, O. М.; Podgornyi, D. Y.

doi:10.3103/s0095452716020079

Cited by 3 publications

(1 citation statement)

References 12 publications

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“…Our observations demonstrated signi cant sel ng and biparental inbreeding in Masson pine seed tree stands (t m = 0.889, t s = 0.648, t m -t s = 0.240). This result is similar to previous reports in other conifers (Kaya et al 2006;Bower and Aitken 2007;Korshykov et al 2016) but inconsistent with the results of nearly no inbreeding (t m ≥ 1) in other Masson pine seed production populations (Zhang et al 2008;Tan 2011;Feng et al 2017). We inferred that all those studies derived from seedlings rather than seeds were unable to detect the proportion of selfed zygotes killed by recessive lethal genes during the stage of embryo development and germination (Kärkkäinen and Savolainen 1993); thus, the inbreeding level of Masson pine seed production populations is probably underestimated.…”

Section: Mating Systemcontrasting

confidence: 50%

How does population outcrossing rate influence seed quality? Evidence from a 58-year-old seed tree stand of Pinus massoniana

Wei

Chen

et al. 2022

Preprint

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Inbreeding is thought to be a key adverse factor impacting the genetic quality of seeds in seed production populations and the inbreeding degree (i.e., selfing or outcrossing rate) of seed production populations have been extensively assessed through mating system analysis. The depression effect of inbreeding on seed quality traits in seed production populations under open-pollination conditions has not yet been clearly described. In this study, the open-pollinated seeds were collected from 26 mother trees in a 58-year-old seed tree stand. Three seed quality traits, including thousand-seed weight (TSW), germination rate (GR) and germination potential (GP), were measured, and the seeds from eight of 26 families with significant differences in seed quality traits were genotyped through twelve microsatellite markers. In addition, the seeds and sprouts (germinated seeds) from six families were genotyped to reveal the effect of inbreeding on seed germination. The three seed quality traits significantly differed among families (p<0.001). The multilocus outcrossing rate (tm = 0.889) and single-locus outcrossing rate (ts = 0.648) of overall seeds indicated apparent selfing (11.1%) and biparental inbreeding (24.0%). The outcrossing rate in the sprout group (tm = 0.919, ts = 0.788) was higher than that in the seed group (tm = 0.833, ts = 0.646), and the difference in ts between groups was different from zero under the 95% confidence interval (0.024-0.260), suggesting that inbreeding negatively affected seed germination. Linear regression demonstrated that TSW was positively correlated with tm and ts, while GR was negatively related to tm-ts and positively related to ts, implying that seed mass (development) was probably more affected by self-fertilization, but germination capacity was more influenced by biparental inbreeding. Roughly, the inbreeding depression (ID) of TSW was 26.3% with a 0.1 decrease in tm, while GR was 8.4% with a 0.1 decrease in ts. In summary, these results suggest that the IDs during seed development and the germination stage of Masson pine were nonignorable and that more attention should be given to the establishment and management of Masson pine seed production.

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Section: Mating Systemcontrasting

confidence: 50%

How does population outcrossing rate influence seed quality? Evidence from a 58-year-old seed tree stand of Pinus massoniana

Wei

Chen

et al. 2022

Preprint

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How does population outcrossing rate influence seed quality? A case study from a seed tree stand of Pinus massoniana

Wei,

Chen,

et al. 2023

New Forests

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Phenogenogeography of Pinus sylvestris L. populations in Yakutia and the Amur Region

Sannikov¹,

Петрова²,

Cherepanova³

2023

Agrarian Bulletin of The

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Abstract. To preserve biological diversity, it is necessary to determine the genetic structure of species populations, because this gives the most complete picture of the manifestation of polymorphism and makes it possible to detect genetically and phenotypically distinct subspecies. The information obtained will help determine the optimal habitat and protection conditions for endangered and farmed species. The purpose of research is to conduct an allozyme analysis of 10 populations of P. sylvestris L. 2 of the physiographic countries of Yakutia and the Amur region. Results. An allozyme analysis revealed less polymorphism and the most drastic differentiation of the Amur region populations (at the level of geographic race) from Yakutia populations, subdivided from each other at the level of geographical populations. Significant differences are shown between the populations of Yakutia and Amur Region according to the distances of Mahalanobis, calculated according to 19 signs of cones. A positive linear relationship was obtained between the distances of Mahalanobis (D2) and the genetic distances of Ney (DN78) (R2 = 0.4159). Scientific novelty. A dominant role in the origin of the Yakut populations of P. sylvestris of three Siberian group-gradual fellings (GGF) - Tynda, Romanovka, Irkutsk and a decrease in the genetic similarity of the GGF as they move away from Yakutia were found.

show abstract

Genetic variability of maternal plants and embryos of their seeds in the populations of Pinus kochiana Klotzsch ex Koch in Crimea

Cited by 3 publications

References 12 publications

How does population outcrossing rate influence seed quality? Evidence from a 58-year-old seed tree stand of Pinus massoniana

How does population outcrossing rate influence seed quality? Evidence from a 58-year-old seed tree stand of Pinus massoniana

How does population outcrossing rate influence seed quality? A case study from a seed tree stand of Pinus massoniana

Phenogenogeography of Pinus sylvestris L. populations in Yakutia and the Amur Region

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