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2 edition of Genetic studies of five white pine species and their interspecific hybrids by isozymes. found in the catalog.

Genetic studies of five white pine species and their interspecific hybrids by isozymes.

Ebby Mmbone Chagala

Genetic studies of five white pine species and their interspecific hybrids by isozymes.

by Ebby Mmbone Chagala

  • 156 Want to read
  • 4 Currently reading

Published .
Written in English


The Physical Object
Pagination230 leaves.
Number of Pages230
ID Numbers
Open LibraryOL18840487M

Referring to interspecific hybrids, I have the following two questions: . Quoting from wikipedia: The offspring of an interspecific cross are very often sterile; thus, hybrid sterility prevents the movement of genes from one species to the other, keeping both species distinct. Abstract. Genetic variation within and differentiation among nine Scots pine populations from the lowlands and the mountains in Poland were examined at nine gene loci coding for five enzyme systems involved in the energy and amino acid metabolism.

Impacts Slash hybrids: The analysis of the BC1 family and the open-pollinated slash and loblolly pine families showed that the BC1 was the fastest growing family and had incidence of tip moth attack near that of the more resistant species. The combination of tip moth resistance and high growth rate is economically attractive and not available.   The hybrids were first produced as possible alternatives to radiata pine for southern conditions. Parent trees were selected for growth and form, and seedlots trialled at various South Island sites. Sixteen years later at mid-rotation, the hybrids are demonstrating the cold and snow resistance of P. attenuata combined with the faster growth of.

We have 0 solutions for your book! Chapter: CH2 CH3 CH4 CH5 CH6 CH7 CH8 CH9 CH10 CH11 CH12 CH13 CH14 CH15 CH16 CH17 CH18 CH19 CH20 CH21 CH22 CH23 CH24 CH25 CH27 CH28 CH29 CH30 CH31 CH32 Problem: 1CTQ 1LBW 2CTQ 3CTQ 4CTQ 5CTQ. Therefore, the prefertilization barriers in interspecific and intergeneric hybridizations seem to be similar to the self-incompatibility observed in Brassicaceae species, although genetic analysis using the F 2 population between an interspecific-incompatible line and a self-compatible cultivar could not confirm the responsibility of the line.


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Genetic studies of five white pine species and their interspecific hybrids by isozymes by Ebby Mmbone Chagala Download PDF EPUB FB2

Previous genetic studies showed that, when a single Gc chromosome is added to the common wheat genome, chromosomal breaks occur in the male and female gametes that lack the Gc chromosome, whereas the chromosomes in the gametes that have the Gc chromosome remain intact (Finch et al., ; Nasuda et al., ).The induced chromosomal breaks can arrest cell cycle during.

Hybridisation can occur in the hybrid zones where the geographical ranges of species, subspecies, or distinct genetic lineages overlap. For example, the butterfly Limenitis arthemis has two major subspecies in North America, L.

arthemis (the white admiral) and L. astyanax (the red-spotted purple). The white admiral has a bright, white band on its wings, while the red-spotted purple has.

This is an list of genetic hybrids which is limited to well documented cases of animals of differing species able to create hybrid offspring which may or may not be infertile. Hybrids should not be confused with genetic chimeras, such as that between sheep and goat known as the interspecific hybrids can be made via in vitro fertilization or somatic hybridization, however the.

Gudin, in Reference Module in Life Sciences, Interspecific crosses. As stated earlier, interspecific hybridization, either spontaneous or artificial, is at the origin of today׳s the 10 original wild species that have constituted the artificial species R.

hybrida, most are diploid, but some are tetraploid or modern rose is mostly represented by tetraploid. Gene flow can occur across species boundaries if hybrids backcross to the parental species; as a result, interspecific gene flow is commonly reported among dominant tree species, such as poplars.

An illustration of an open book. Books. An illustration of two cells of a film strip. Video An illustration of an audio speaker. Genetic Introgression and Species Boundary of Two Geographically Overlapping Pine Species Revealed by Molecular Markers.

Mizushima, U. () Karyogenetic studies of species and genus hybrids in the tribe Brassiceae of Cruciferae. Tohoku J. Agri. Res. 1: 1–14 [Google Scholar] Momotaz, A., Kato, M.

and Kakihara, F. () Production of intergeneric hybrids between Brassica and Sinapis species by means of embryo rescue techniques. Euphytica – [Google. Pine cones usually mature in the second year, dropping a winged seed from between each cone scale. Depending on the species of pine, empty cones may drop off immediately after seed fall or hang on for several years or many years.

Some pines have "fire cones" that only open after the heat from a wildland or prescribed fire releases the seed.

Pine species have proved to vary widely in their crossing ability. Strobi9 a group that includes nearly all of the familiar five-needled white pines (P. strobus3 P. monticola, etc.). Two verified hybrids have been Most interspecific pine hybrids are highly viable and highly fertile.

Hybrid inviability is very rare, and the only two. Growth and stem straightness traits of 29 Pinus caribaea var. hondurensis × Pinus tecunumanii (PCH × PTEC) and 26 P. caribaea var. hondurensis × Pinus oocarpa (PCH × POOC) hybrid pair-crosses plus a total of 16 intraspecific families were assessed at ages 5, 8 and 15 years from planting at two sites.

The PCH × PTEC hybrid was the most productive, yielding 37 % more than a Pinus. In biology, hybrid has two meanings. The first meaning is the result of interbreeding between two animals or plants of different taxa.

Hybrids between different species within the same genus are. Tree identification can be challenging. Many times differing species have similar characteristics. For those in Michigan and nearby states it's easy to tell a white pine from a norway pine from a jack pine. Just check the needles.

White pine, left, with five needle fascicle removed next to it; white spruce, center; balsam fir, right. Background and Aims.

Interspecific gene flow can occur in many combinations among species within the genus Quercus, but simultaneous hybridization among more than two species has been rarely present study addresses the genetic structure and morphological variation in a triple hybrid zone formed by Q.

hypoleucoides, Q. scytophylla and Q. sideroxyla in north-western Mexico. Furthermore, ISSR primers have also been successfully used to estimate the degree of intra and interspecific genetic diversity in other species, including rice (Joshi et al., ), wheat (Nagaoka.

A study by Rajora et al. () compared genetic diversity between pre-harvest pristine and post-harvest residual gene pools of two adjacent, old-growth stands of Eastern White Pine in Ontario. The results demonstrate a reduction in genetic diversity in the post-harvest residual gene pools of the two old-growth stands.

Molecular Genetic Variation in Whitebark Pine Paper Abstract—Levels of genetic variation within and among in-dividual-tree collections and one bulk lot of whitebark pine were estimated using isozymes, mitochondrial DNA and chloroplast DNA; 79 of the samples are also part of a common garden study.

Higher Quality. Interspecific hybrids may surpass traditional varieties in taste, shelf-life, size, texture, nutrition, etc. Stone fruit, in particular, has a seemingly unending number of interspecific hybrid varieties developed for their flavor and novel appearance: pluots, plumcots, and apriums are all common examples of this phenomenon at work, but there are also nectaplums, peacharines.

Diploid Speciation of Pinus densata and -7) and three populations of P. yunnanensis (Py-1, -2, TFPGA program ver. (Miller ). To generate confi-and -3) from the natural range of each species in China. The dence estimates in the constructed tree, the bootstrap proce. INTERSPECIFIC PINE HYBRIDS.

for growth traits of this species (MUNTHALI & STEW- ART ). Studies with PCH within Australia have generally shown that family and population perfor- mance is highly consistent across sites (GIBSON et al.WOOLASTON et al. a, b). The strength of. The offspring of two plants of different breeds, varieties, or species, especially as produced through human manipulation for specific genetic characteristics, is a hybrid.

Charles Darwin promoted the concept of cross-breeding, but Gregor Mendel is credited with starting the hybrid plant revolution with his genetic studies of peas in the early.

Mts were also included in this study (see Electronic Appendix 1 for locality details). A subset of plants of known genome sizes, representing four recognized taxonomic groups (two parental species and two types of interspecific hybrids), was subsequently selected for morphometric analyses. Pressed flowering/fruiting shoots and flowers stored.(AFLP) markers were developed and used to study genetic diversity and its structure in these pine species.

After screening 48 primer pairs, 17 and 21 pairs were selected that produced and AFLPs in shortleaf pine and loblolly pine, respectively. High-AFLP-based genetic diversity exists within shortleaf pine and loblolly pine, and most.The Mexican White Pine by JEANNE SMITH The Arnold Arboretum has more than 40 species of pine growing on its grounds from throughout the geographic range of the genus.

The Mexican White Pine, Pinus ayacahuite, is particularly intriguing because it is the Arboretum’s southernmost representative of the ge- nus as well as being one of the very few Mexican plants hardy here.