Tuber yield and tuber traits of haploid-wild species F1 hybrids

1986 ◽  
Vol 29 (3) ◽  
pp. 289-297 ◽  
Author(s):  
Shelley Hermundstad ◽  
S. J. Peloquin
Keyword(s):  
Wild Species ◽  
Tuber Yield ◽  
F1 Hybrids ◽  
Tuber Traits

scholarly journals Base temperature for node emission and plastochron determination in tomato species and their hybrids

2018 ◽  
Vol 53 (3) ◽  
pp. 307-315
Author(s):  
André Ricardo Zeist ◽  
Juliano Tadeu Vilela de Resende ◽  
Marcos Ventura Faria ◽  
André Gabriel ◽  
Israel Felipe Lustosa da Silva ◽  
...  
Keyword(s):  
Wild Species ◽  
Interspecific Hybrids ◽  
Mean Squared Error ◽  
Main Stem ◽  
F1 Hybrids ◽  
Base Temperature ◽  
Solanum Pennellii ◽  
Solanum Habrochaites ◽  
Tomato Species ◽  
Wild Accessions

Abstract: The objective of this work was to estimate the base temperature for node emission and plastochron determination in wild species of tomato, in the Redenção cultivar, and in their respective interspecific F1 hybrids. The wild accessions Solanum pimpinellifolium AF 26970, Solanum galapagense LA-1401, Solanum peruvianum AF 19684, Solanum habrochaites var. hirsutum PI-127826, Solanum habrochaites var. glabratum PI-134417, and Solanum pennellii LA-716; the cultivar Redenção (Solanum lycopersicum); and their respective interspecific hybrids were evaluated, on the transplanting dates 12/22/2015, 2/12/2016, and 4/6/2016. The base temperature was estimated using the least mean squared error of the linear regression between the number of nodes and the accumulated thermal sum. The plastochron for the main stem and the first three lateral stems was estimated using the base temperature. The base temperature for node emission and plastochron determination varied from 4.5 to 14.8°C. The species S. habrochaites var. hirsutum accession PI-127826, S. habrochaites var. glabratum accession PI-134417, and their hybrids with the Redenção cultivar showed the lowest base temperatures and plastochron for the main stem, whereas the remaining wild species and interspecific hybrids had a base temperature near that of cultivated tomato. Wild species and interspecific hybrids of tomato show a great variation in base temperature for node emission and plastochron determination.

The high fruit soluble sugar content in wild Lycopersicon species and their hybrids with cultivars depends on sucrose import during ripening rather than on sucrose metabolism

2006 ◽  
Vol 33 (3) ◽  
pp. 279 ◽  
Author(s):  
María E. Balibrea ◽  
Cristina Martínez-Andújar ◽  
Jesús Cuartero ◽  
María C. Bolarín ◽  
Francisco Pérez-Alfocea
Keyword(s):  
Wild Species ◽  
Sugar Content ◽  
Soluble Sugar ◽  
Sucrose Metabolism ◽  
F1 Hybrids ◽  
Metabolic Parameter ◽  
Wild Relative ◽  
Soluble Sugar Content ◽  
Total Soluble Sugar ◽  
In The Wild

Soluble sugar content has been studied in relation to sucrose metabolism in the hexose-accumulating cultivated tomato Lycopersicon esculentum Mill, the wild relative species Lycopersicon cheesmanii Riley, in the sucrose-accumulating wild relative species Lycopersicon chmielewskii Rick, Kesicky, Fobes & Holle. and in two hexose-accumulating interspecific F1 hybrids (L. esculentum × L. cheesmanii; L. esculentum × L. chmielewskii), cultivated under two irrigation regimes (control: EC = 2.1 and saline: EC = 8.4 dS m–1). Under control conditions the total soluble sugar content (as hexose equivalents) in the ripe fruits of L. cheesmanii was 3-fold higher than in L. esculentum, while L. chmielewskii and both F1 hybrids contained twice as much as the cultivar. With the exception of L. esculentum × L. cheesmanii, salinity increased the sugar content by 1.3 (wild species) and 1.7 times (cultivar and L. esculentum × L. chmielewskii) with respect to control fruits. Wild germplasm or salinity provided two different mechanisms for the increases in fruit sugar content. The hexoses accumulated in ripe fruits were strongly influenced by those accumulated at the start of ripening, but the hydrolysed starch before start of ripening only partially explained the final hexose levels and especially the increase under salinity. The early cell wall acid invertase and the late neutral invertase activities appeared to be related to the amount of hexoses accumulated in ripe fruits. However, no metabolic parameter was positively related to the amount of sugar accumulated (including sucrose). The major differences between genotypes appeared in ripe fruits, in which up to 50% of the total amount of sugars accumulated in the wild species (mainly in L. cheesmanii) and hybrids cannot be explained by the sugars accumulated and the starch hydrolysed before the start of ripening stage. As a consequence, the higher fruit quality of the wild species compared with L. esculentum may depend more on the continuation of sucrose import during ripening than on osmotic or metabolic particularities such as the hexose / sucrose-accumulator character or specific enzyme activities.

scholarly journals Homoeologous recombination is recurrent in the nascent synthetic allotetraploid Arachis ipaënsis × Arachis correntina4x and its derivatives

2021 ◽  
Vol 11 (4) ◽  
Author(s):  
Ye Chu ◽  
David Bertioli ◽  
Chandler M Levinson ◽  
H Thomas Stalker ◽  
C Corley Holbrook ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Wild Species ◽  
Gene Pool ◽  
Genome Instability ◽  
Snp Array ◽  
F1 Hybrids ◽  
Homoeologous Recombination ◽  
F2 Population ◽  
Genomic Regions ◽  
Unpredictable Variation

Abstract Genome instability in newly synthesized allotetraploids of peanut has breeding implications that have not been fully appreciated. Synthesis of wild species-derived neo-tetraploids offers the opportunity to broaden the gene pool of peanut; however, the dynamics among the newly merged genomes creates predictable and unpredictable variation. Selfed progenies from the neo-tetraploid Arachis ipaënsis × Arachis correntina (A. ipaënsis × A. correntina)4x and F1 hybrids and F2 progenies from crosses between A. hypogaea × [A. ipaënsis × A. correntina]4x were genotyped by the Axiom Arachis 48 K SNP array. Homoeologous recombination between the A. ipaënsis and A. correntina derived subgenomes was observed in the S0 generation. Among the S1 progenies, these recombined segments segregated and new events of homoeologous recombination emerged. The genomic regions undergoing homoeologous recombination segregated mostly disomically in the F2 progenies from A. hypogaea × [A. ipaënsis × A. correntina]4x crosses. New homoeologous recombination events also occurred in the F2 population, mostly found on chromosomes 03, 04, 05, and 06. From the breeding perspective, these phenomena offer both possibilities and perils; recombination between genomes increases genetic diversity, but genome instability could lead to instability of traits or even loss of viability within lineages.

scholarly journals Tolerance Even to Lethal Strain of Potato Spindle Tuber Viroid Found in Wild Tomato Species Can Be Introduced by Crossing

Plants ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 575
Author(s):  
Takashi Naoi ◽  
Tatsuji Hataya
Keyword(s):  
Solanum Lycopersicum ◽  
Wild Species ◽  
Systemic Infection ◽  
Potato Spindle Tuber Viroid ◽  
Natural Resistance ◽  
F1 Hybrids ◽  
Wild Tomato ◽  
Wild Tomato Species ◽  
Tomato Species ◽  
Tomato Breeding

To date, natural resistance or tolerance, which can be introduced into crops by crossing, to potato spindle tuber viroid (PSTVd) has not been reported. Additionally, responses to PSTVd infection in many wild tomato species, including some species that can be crossed with PSTVd-susceptible cultivated tomatoes (Solanum lycopersicum var. lycoperaicum), have not been ascertained. The aim of this study was to evaluate responses to PSTVd infection including resistance and tolerance. Accordingly, we inoculated several cultivated and wild tomato species with intermediate and lethal strains of PSTVd. None of the host plants exhibited sufficient resistance to PSTVd to render systemic infection impossible; however, these plants displayed other responses, including tolerance. Further analysis of PSTVd accumulation revealed low accumulation of PSTVd in two wild species, exhibiting high tolerance, even to the lethal strain. Additionally, F1 hybrids generated by crossing a PSTVd-sensitive wild tomato (Solanum lycopersicum var. cerasiforme) with these wild relatives also exhibited tolerance to the lethal PSTVd strain, which is accompanied by low PSTVd accumulation during early infection. These results indicate that the tolerance toward PSTVd in wild species is a dominant trait and can be utilized for tomato breeding by crossing.

Frequency and mechanisms of 2n egg formation in haploid tuberosum-wild species F1 hybrids

1987 ◽  
Vol 64 (12) ◽  
pp. 641-654 ◽  
Author(s):  
Joanna E. Werner ◽  
S. J. Peloquin
Keyword(s):  
Wild Species ◽  
F1 Hybrids ◽  
Egg Formation

Salt Tolerance in the Wild Relatives of the Cultivated Tomato: Responses of Lycopersicon esculentum, L. cheesmanii, L. peruvianum, Solanum pennellii and F1 Hybrids to High Salinity

1983 ◽  
Vol 10 (1) ◽  
pp. 109 ◽  
Author(s):  
M Tal ◽  
MC Shannon
Keyword(s):  
Wild Species ◽  
Elongation Rate ◽  
Wild Relatives ◽  
Wild Plants ◽  
F1 Hybrids ◽  
Cultivated Plants ◽  
Solanum Pennellii ◽  
High Accumulation ◽  
Relative Decrease ◽  
In The Wild

The performance of three wild relatives of the cultivated tomato (Lycopersicon cheesmanii, L. peruvianum and Solanum pennellii) and two tomato cultivars in control and saline media was compared. The parameters studied were elongation rate of the main stem, succulence, and accumulation of Na+, K+, and Cl- in the roots, stem, leaf, and shoot tip. The same parameters but in the leaf only were also studied comparatively in two of the wild species L. cheesmanii and S. pennellii, the same two cultivars, and F1 hybrids. Under control conditions, the elongation rate of the stem of the two cultivars was higher than that of the wild plants, but under salinity it was relatively lower. Among all species, S. pennellii was the most succulent in all its major parts under both control and saline conditions. The wild species, especially S. pennellii, showed high accumulation of Na+ in the leaf and top and a greater decrease in K+ content under salinity as compared with the cultivated plants. In all three species, Na+ probably substitutes for potassium in, at least, some of its physiological functions. Complete dominance of S. pennellii over the cultivated plants is indicated for the relative decrease of elongation rate and K+ level and for the increase of succulence under salinity. In contrast, L. cheesmanii seems to be completely dominant only for the relative decrease of K+ under salinity.

Influence of the Oryza sativa genotype on the fertility and quantitative traits of F1 hybrids between the two cultivated rice species O. sativa L. and O. glaberrima Steud.

Genome ◽  
1989 ◽  
Vol 32 (5) ◽  
pp. 810-815 ◽  
Author(s):  
Bruno Bougerol ◽  
Jean-Louis Pham
Keyword(s):  
Oryza Sativa ◽  
Interspecific Hybridization ◽  
Wild Species ◽  
Quantitative Traits ◽  
F1 Hybrids ◽  
Oryza Glaberrima ◽  
Quantitative Inheritance ◽  
Cultivated Rice ◽  
High Heritability ◽  
Parental Lines

Crosses were carried out between the two cultivated rice species, using a constant Oryza glaberrima parent and 14 O. sativa cultivars, including 11 traditional African ones. The F1 hybrids were studied for quantitative traits and their fertility. Analyses of the quantitative traits revealed the intermediate position of F1 s with respect to the parental lines and the high heritability of several characters, including the secondary branching within the panicle. All F1 hybrids showed complete seed sterility and only by an examination of the pollen could the different combinations be discriminated. The hybrids obtained from two O. sativa cultivars introgressed from the wild species O. longistaminata were particularly sterile.Key words: rice, Oryza sativa, Oryza glaberrima, interspecific hybridization, sterility, quantitative inheritance.

Interspecific hybridisation and cytogenetic studies in ornamental sunflower breeding

2005 ◽  
Vol 45 (1) ◽  
pp. 93 ◽  
Author(s):  
J. Atlagic ◽  
V. Secerov-Fiser ◽  
R. Marinkovic
Keyword(s):  
Wild Species ◽  
Chromosome Structure ◽  
F1 Hybrids ◽  
Interspecific Hybridisation ◽  
F1 Hybrid ◽  
Dominant Phenotype ◽  
Hybrid Plants ◽  
Cytogenetic Studies ◽  
The Common ◽  
Chromosome Bridges

This study examined the possibility of using wild sunflower species as a source of desirable genes in breeding the common ornamental sunflower. Crossing 7 wild species with 6 inbred lines of common ornamental sunflower produced F1 hybrid plants only with Helianthus argophyllus and H. petiolaris. The F1’s exhibited the dominant phenotype of the wild species. Cytological analysis showed irregularities in meiosis and low pollen fertility in F1 hybrids. The most frequent configuration was 15 bivalents and 1 quadrivalent and 13 bivalents and 2 quadrivalents. The presence of quadrivalents at diakinesis indicated the occurrence of translocations. In a small percentage of anaphase I meiocytes, chromosome bridges were detected resulting from inversions. The occurrence of translocations and inversions showed the differences in chromosome structure among the crossed species. Helianthus argophyllus and H. petiolaris may be useful in ornamental sunflower breeding as valuable sources of desirable genes.

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