INTRASPECIFIC HYBRIDIZATION AND THE RECOVERY OF FITNESS IN THE NATIVE LEGUME CHAMAECRISTA FASCICULATA

Evolution ◽  
2006 ◽  
Vol 60 (2) ◽  
pp. 225 ◽  
Author(s):  
David L. Erickson ◽  
Charles B. Fenster
Keyword(s):  
Chamaecrista Fasciculata ◽  
Intraspecific Hybridization ◽  
Native Legume

scholarly journals Molecular characteristics of S-RNase alleles as the determinant of self-incompatibility in the style of Fragaria viridis

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Jianke Du ◽  
Chunfeng Ge ◽  
Tingting Li ◽  
Sanhong Wang ◽  
Zhihong Gao ◽  
...  
Keyword(s):  
Diploid Species ◽  
The Self ◽  
Molecular Characteristics ◽  
Self Incompatibility ◽  
Intraspecific Hybridization ◽  
Noncoding Sequences ◽  
Family Analysis ◽  
The Family ◽  
Genotype Identification ◽  
Rnase T2

AbstractStrawberry (Fragaria spp.) is a member of the Rosoideae subfamily in the family Rosaceae. The self-incompatibility (SI) of some diploid species is a key agronomic trait that acts as a basic pollination barrier; however, the genetic mechanism underlying SI control in strawberry remains unclear. Two candidate S-RNases (Sa- and Sb-RNase) identified in the transcriptome of the styles of the self-incompatible Fragaria viridis 42 were confirmed to be SI determinants at the S locus following genotype identification and intraspecific hybridization using selfing progenies. Whole-genome collinearity and RNase T2 family analysis revealed that only an S locus exists in Fragaria; however, none of the compatible species contained S-RNase. Although the results of interspecific hybridization experiments showed that F. viridis (SI) styles could accept pollen from F. mandshurica (self-compatible), the reciprocal cross was incompatible. Sa and Sb-RNase contain large introns, and their noncoding sequences (promotors and introns) can be transcribed into long noncoding RNAs (lncRNAs). Overall, the genus Fragaria exhibits S-RNase-based gametophytic SI, and S-RNase loss occurs at the S locus of compatible germplasms. In addition, a type of SI-independent unilateral incompatibility exists between compatible and incompatible Fragaria species. Furthermore, the large introns and neighboring lncRNAs in S-RNase in Fragaria could offer clues about S-RNase expression strategies.

Intraspecific hybridization, life history strategies and potential invasion success in a parasitoid wasp

2012 ◽  
Vol 26 (6) ◽  
pp. 1311-1329 ◽  
Author(s):  
Chiara Benvenuto ◽  
Sandrine Cheyppe-Buchmann ◽  
Gérald Bermond ◽  
Nicolas Ris ◽  
Xavier Fauvergue
Keyword(s):  
Life History ◽  
Parasitoid Wasp ◽  
Invasion Success ◽  
Life History Strategies ◽  
Intraspecific Hybridization

scholarly journals New variety of soft winter wheat Alyonushka

2021 ◽  
pp. 27-30
Author(s):  
Svetlana Valentinovna Kosenko
Keyword(s):  
High Mass ◽  
High Yield ◽  
Hybrid Population ◽  
Lodging Resistance ◽  
New Variety ◽  
Intraspecific Hybridization ◽  
Gluten Quality ◽  
Economically Valuable Traits ◽  
Soft Winter Wheat

The article presents the main methods of creating and the results of studying a new variety of winter soft wheat Alyonushka. The variety was created at the FSBRI OP Penza Research Institute of Agriculture by the method of intraspecific hybridization of varieties with subsequent individual selection from the hybrid population F3 Kazanskaya 237 // Moshinskaya 2 / Zolushka. The characteristics of the new variety are given according to the most important economically valuable traits and properties. The new variety Alyonushka in terms of grain yield and the elements composing it, during the years of research (2015–2018), significantly exceeded the standard variety Fotinya. The average increase in grain to the standard for these years was 0.78 t / ha. The high yield of the new variety is formed due to the high mass of 1000 grains, the number and weight of grain per spike. It has high winter hardiness (88% on average), high lodging resistance (9 points) and grain quality at the level of valuable wheat. The new variety Alyonushka stably forms a completed grain (grain nature is 756-797 g / l), the content of crude protein in the grain is 14.8-16.2%, gluten is 28.2-30.2% with a gluten quality of 50-85 units. ... IDK (I-II group), baking strength of flour - 296 units, volumetric yield of bread from 100 g of flour - 780 cm3, overall assessment of bread - 4.7 points. The economic efficiency of cultivation of the Alyonushka variety in comparison with the Fotinya standard was 3780 rubles / ha. The profitability level of the new variety was 135%, which is 21% higher than that of the standard.

scholarly journals Intraspecific Hybridization Of Normal Pigmented And Albino Clarias Gariepinus From Yola And Katsina under Hatchery Condition

2021 ◽  
Vol 37 (2) ◽  
pp. 152-156
Author(s):  
L.U Onyia ◽  
I.J Ochokwu ◽  
V Robinson
Keyword(s):  
Clarias Gariepinus ◽  
Left Testis ◽  
Volume Percentage ◽  
Intraspecific Hybridization ◽  
Genetic Crosses ◽  
Reciprocal Hybrids ◽  
Highest Weight ◽  
Specific Hybridization ◽  
Left And Right ◽  
The Right

The study examined the reproductive indices of albino and normal pigmented Clarias gariepinus fish from Katsina (KT) and Yola (YY), carried out under hatchery condition. The experiment compared the fecundity, testes, milt volume, percentage fertilization and hatchability of albino (AA) and normal pigmented (NN) Clarias gariepinus from Katsina (KT) and Yola (YY). Normal pigmented C. gariepinus from Katsina (KT) had the highest number of eggs (229,240), followed by YY (127,250) and the least was recorded in the Albino (AA) (124,750). The weights and lengths of the left and right lobes as well as the volumes of the milt were quantified . However, KT had the highest weight and length of the right testis (18g and 5.7cm respectively) while AA had the highest weight, length of the left testis and milt volume (30g, 11cm and 8.4ml respectively). The least length and weight of the testes was observed in YY. Meanwhile, KT and YY had milt volumes of 4.0ml and 4.7ml, respectively. The highest percentage fertilization and hatchability were recorded in KT × KT (98.7% and 98.5% respectively) among the purebred, while KT × AA had the highest percentage fertilization and hatchability (98.4% and 97.3% respectively) in the reciprocal hybrids. The percentage fertilization and hatchability among the genetic crosses showed significant differences (p<0.05). The results deduced the essentiality of fish hybridization. Furthermore, crossing of broodstocks from different regions have showcased the contingency of acquiring fish seed of improved reproductive potentials in the reciprocal hybrids in the aspects of fecundity, fertilization, hatchability rate, testis quality and faster growth. Keywords: Albino, Fecundity, Intra-specific Hybridization, Normal pigmented, Testis

scholarly journals Cassia Yellow Blotch Virus: a New Bromovirus from an Australian Native Legume, Cassia pleurocarpa

1984 ◽  
Vol 65 (2) ◽  
pp. 281-288 ◽  
Author(s):  
J. L. Dale ◽  
A. J. Gibbs ◽  
G. M. Behncken
Keyword(s):  
Native Legume

On the processes of sympatric speciation in the group of «yellow» wagtails in the Middle Volga region

2021 ◽  
pp. 105-111
Author(s):  
Elena Artemieva
Keyword(s):  
Genetic Divergence ◽  
Sympatric Speciation ◽  
Genetic Distances ◽  
Middle Volga Region ◽  
Intraspecific Hybridization ◽  
Yellow Wagtail ◽  
Leading Role ◽  
European Part Of Russia ◽  
Genetic Mechanisms ◽  
Spatio Temporal

This article discusses the mechanisms of sympatric speciation in the group of species of «yellow» wagtails based on hybridization. Interspecific and intraspecific hybridization can be attributed to the genetic mechanisms of divergence of populations of «yellow» wagtails. The existence of hybridization between the subspecies of the white-eared yellow wagtail M. flava beema and the yellow-fronted wagtail M. lutea leads to the emergence and further accumulation in the population of individuals with a light-colored head to varying degrees, the so-called «gray-headed» individuals. Intraspecific hybridization of subspecies forms of the yellow wagtail M. flava — nominative M. f. flava and white-eared M. f. beema leads to constantly occurring genotypic splits, which support intraspecific polymorphism of populations and provide the basis for further genetic divergence of these subspecies and species. The form of "gray-headed" hybrids is characterized by maximum genetic distances (1306.67–1375.67), which may correspond to the species rank. The modern polytypic complex of M. flava (in the narrow sense, a series of species and subspecies of only M. flava) probably formed in historical time on the basis of fan hybridization between the original forms of M. f. flava and M. lutea. Thus, the factors of genetic differentiation and divergence, along with ecological and geographical isolation, play a leading role in the formation of the spatio-temporal and genetic structure of the genus Motacilla. Currently, there is an active process of genetic divergence and separation of subspecies and species forms of «yellow» wagtails under conditions of wide sympatry within a single polytypic complex based on intraspecific and interspecific hybridization in the European part of Russia.

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