scholarly journals Meiotic Irregularities in Interspecific Crosses Within Edible Alliums

10.5772/30029 ◽  
2012 ◽  
Author(s):  
Agnieszka Kiekowska
Keyword(s):  
Interspecific Crosses ◽  
Meiotic Irregularities

Relationship in annual species of Medicago. II. Interspecific crosses between M. tornato (L.) Mill. and M. littoralis Rhode.

1965 ◽  
Vol 16 (1) ◽  
pp. 51 ◽  
Author(s):  
JP Simon
Keyword(s):  
Pollen Fertility ◽  
Structural Changes ◽  
Seed Set ◽  
Morphological Characteristics ◽  
Pollen Sterility ◽  
Interspecific Crosses ◽  
Annual Species ◽  
Reciprocal Crosses ◽  
Meiotic Irregularities ◽  
Early Seedling

Six hybrids were obtained from 212 reciprocal crosses between M. littoralis Rhode and M. tornata (L.) Mill. The hybrids were chlorophyll-deficient in the early seedling stage but later development was normal although growth was retarded. The morphological characteristics were intermediate between those of the parents. Pollen fertility and seed set amounted to 7 and 10% respectively. Meiotic irregularities indicate that M. littoralis is differentiated from M. tornata by at least one translocation. The contribution of the structural changes in the chromosomes accounted for about 60% of the observed pollen sterility.

INTERSPECIFIC CROSSES INVOLVING ALFALFA. IV. Medicago glomerata × M. sativa with reference to M. prostrata

1968 ◽  
Vol 10 (3) ◽  
pp. 536-544 ◽  
Author(s):  
K. Lesins
Keyword(s):  
Chromosome Pairing ◽  
Seed Set ◽  
Interspecific Crosses ◽  
Good Seed ◽  
Chromosome Behavior ◽  
Separate Species ◽  
Meiotic Irregularities ◽  
Preferential Chromosome Pairing ◽  
Morphological Differences ◽  
Anthocyanin Production

A good seed set was obtained from crosses of Medicago glomerata Balb. with M. sativa L. There was no evidence of a preferential chromosome pairing effect on segregation for floral anthocyanin. From an analysis of different M. glomerata × M. sativa crosses four factors were found to be involved in anthocyanin production. About 90% of the cells showed normal chromosome behavior during meiosis. Taxonomically, M. glomerata stands somewhat apart from the M. sativa — falcata complex, as indicated by a lower seed set from intercrossed F1's, and by somewhat higher numbers of meiotic irregularities in the F1 plants. With these and other morphological differences M. glomerata is considered as a separate species. When hybridized with M. prostrata Jacq., M. glomerata responded in a similar manner to that of M. sativa. The weight of seeds produced by M. glomerata plants was approximately the same, whether fertilized by M. glomerata or by M. sativa pollen. There is a somewhat greater affinity between M. glomerata and M. prostrata than between M. sativa and M. prostrate; M. prostrata plants fertilized by M. glomerata pollen had better seed development than those fertilized by M. sativa.

STUDY OF GENETIC BEHAVIOUR OF INTERSPECIFIC CROSSES OF MAIZE-TEOSINTE (1)

2013 ◽  
Vol 4 (12) ◽  
pp. 1779-1791
Author(s):  
M. Abdel-Aty ◽  
Soad Yousef ◽  
M. Ghazy ◽  
S. Basueny
Keyword(s):  
Interspecific Crosses ◽  
Genetic Behaviour

scholarly journals Epistatic Control of Non-Mendelian Inheritance in Mouse Interspecific Crosses

Genetics ◽  
1996 ◽  
Vol 143 (4) ◽  
pp. 1739-1752 ◽  
Author(s):  
Xavier Montagutelli ◽  
Rowena Turner ◽  
Joseph H Nadeau
Keyword(s):  
X Chromosome ◽  
Genetic Basis ◽  
Mendelian Inheritance ◽  
The Other ◽  
Interspecific Crosses ◽  
Chromosome 2 ◽  
Mus Spretus ◽  
F1 Hybrid ◽  
Strong Deviation ◽  
Marker Loci

Abstract Strong deviation of allele frequencies from Mendelian inheritance favoring Mus spretus-derived alleles has been described previously for X-linked loci in four mouse interspecific crosses. We reanalyzed data for three of these crosses focusing on the location of the gene(s) controlling deviation on the X chromosome and the genetic basis for incomplete deviation. At least two loci control deviation on the X chromosome, one near Xist (the candidate gene controlling X inactivation) and the other more centromerically located. In all three crosses, strong epistasis was found between loci near Xist and marker loci on the central portion of chromosome 2. The mechanism for this deviation from Mendelian expectations is not yet known but it is probably based on lethality of embryos carrying particular combinations of alleles rather than true segregation distortion during oogenesis in F1 hybrid females.

scholarly journals Introgression of Resistance to Leafminer (Liriomyza cicerina Rondani) from Cicer reticulatum Ladiz. to C. arietinum L. and Relationships between Potential Biochemical Selection Criteria

Agronomy ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 57
Author(s):  
Nesrine Chrigui ◽  
Duygu Sari ◽  
Hatice Sari ◽  
Tuba Eker ◽  
Mehmet Fatih Cengiz ◽  
...  
Keyword(s):  
Organic Acids ◽  
Succinic Acid ◽  
Selection Criteria ◽  
Insect Pests ◽  
Recombinant Inbred Lines ◽  
Selection Criterion ◽  
Leaf Miner ◽  
Interspecific Crosses ◽  
Visual Scale ◽  
Resistant Varieties

The chickpea leafminer, Liriomyza cicerina (Rondani), is one of the most destructive insect pests of cultivated chickpea (Cicer arietinum L.) in the Mediterranean region under field conditions. For sustainable and environmentally friendly chickpea production, efforts have been devoted to managing the leafminer via decreasing the use of insecticides. Breeding of new resistant varieties is not only an efficient and practical approach, but also cost-effective and environmentally sensitive. To improve resistant varieties, breeders need reliable biochemical selection criteria that can be used in breeding programs. The first objective was to investigate the possible introgression of resistance to the leafminer from C. reticulatum Ladiz. (resistant) to C. arietinum (susceptible), then, to estimate inheritance of resistance to the leafminer for efficient breeding strategies, and finally, to study organic acid contents as selection criteria. Recombinant inbred lines (RILs) and their parents were evaluated using a visual scale of 1–9 (1 = free from leafminer damage and 9 = mines in more than 91% of the leaflets and defoliation greater than 31%) in the field under natural infestation conditions after the susceptible parent and check had scores of >7 on the visual scale. Superior RILs were found for resistance to the leafminer, and agro-morphological traits indicating that introgression of resistance to leaf miner from C. reticulatum to C. arietinum could be possible using interspecific crosses. The inheritance pattern of resistance to the leafminer in RILs was shown to be quantitative. Organic acids, including oxalic, malic, quinic, tartaric, citric and succinic acids in RILs grown in the field under insect epidemic conditions and in the greenhouse under non-infested conditions were detected by using high performance liquid chromatography (HPLC). In general, organic acids were found to be higher in resistant RILs than susceptible RILs. Path and correlation coefficients showed that succinic acid exhibited the highest direct effects on resistance to the leafminer. Multivariate analyses, including path, correlation and factor analyses suggested that a high level of succinic acid could be used as a potential biochemical selection criterion for resistance to leafminer in chickpea. Resistant RILs with a high seed yield resembling kabuli chickpea can be grown directly in the target environments under leaf miner infestation conditions.

scholarly journals THE EFFECT OF INTERSPECIFIC HYBRIDIZATION ON CERTAIN GENETIC RATIOS IN SWEET CLOVER

1958 ◽  
Vol 36 (3) ◽  
pp. 411-420 ◽  
Author(s):  
H. Baenziger ◽  
J. E. R. Greenshields
Keyword(s):  
Interspecific Hybridization ◽  
Interspecific Crosses ◽  
Sweet Clover ◽  
Melilotus Alba ◽  
Ratio Data ◽  
Interspecific Derivatives ◽  
Derivatives Of

In crosses involving derivatives of interspecific crosses of (Melilotus alba × Melilotus dentata) and (M. officinalis × M. alba) with pure Melilotus alba, irregular ratios were shown to be common. Previous studies using pure M. alba have indicated simple Mendelian inheritances for many of the characters studied herein. However, when interspecific derivatives are involved, some plants give F2 families that do not fit any Mendelian ratio. Data are presented indicating that in segregations where the deficiency occurs it is always in the genotype that has contributed the gene from the non-recurrent species. Investigations carried out in this study are designed to determine possible causes for these "blurred" ratios.

Random amplified polymorphic DNA (RAPD) analysis for the verification of hybridity in interspecific crosses of Alstroemeria

2000 ◽  
Vol 119 (5) ◽  
pp. 443-445 ◽  
Author(s):  
L. de Benedetti ◽  
G. Burchi ◽  
A. Mercuri ◽  
N. Pecchioni ◽  
P. Faccioli ◽  
...  
Keyword(s):  
Rapd Analysis ◽  
Random Amplified Polymorphic Dna ◽  
Interspecific Crosses

Early events in the embryo sac after intraspecific and interspecific pollinations in Rhododendron kawakamii and R. retusum

1986 ◽  
Vol 64 (2) ◽  
pp. 282-291 ◽  
Author(s):  
V. Kaul ◽  
J. L. Rouse ◽  
E. G. Williams
Keyword(s):  
Seed Set ◽  
Embryo Sac ◽  
Pollen Tubes ◽  
Interspecific Crosses ◽  
Primary Endosperm Nucleus ◽  
Kalmia Latifolia ◽  
Taxonomic Grouping ◽  
Similarities And Differences ◽  
Normal Fertilization

Early events in the embryo sac of Rhododendron kawakamii and R. retusum have been studied after compatible self-pollinations and eight interspecific crosses, using sectioned ovaries, pistil squashes, and seed-set data. Ovules of Rhododendron kawakamii and R. retusum are anatropous, unitegmic, and tenuinucellate, with a typical eight-nucleate, seven-celled embryo sac. Fertilization normally occurs 4–5 days after pollination. The zygote lays down a callose wall but remains undivided during the first 13–15 days after pollination. The primary endosperm nucleus divides soon after fertilization, and development is cellular ab initio. Crosses of R. kawakamii (♂) with R. santapaui and R. retusum and crosses of R. retusum (♂) with R. kawakamii, R. santapaui, R. ovatum, and R. tashiroi showed apparently normal fertilization in a majority of ovules entered by pollen tubes. In crosses of R. kawakamii (♂) with R. quadrasianum and Kalmia latifolia entry of pollen tubes into ovules was delayed and frequently abnormal. Apart from compatible self-pollinations of R. kawakamii an R. retusum, only the cross of R. kawakamii (♂) with R. santapaui produced healthy seedlings. Of the remaining seven interspecific crosses only three showed significant embryo development in control pistils left to mature in situ. Similarities and differences in the breeding behaviour of R. kawakamii and R. retusum are discussed with reference to their taxonomic grouping within subsection Pseudovireya.

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