Cytogenetical Studies in the Genus &lt;i&gt;Phaseolus&lt;/i&gt; Linn

Sarbhoy, R. K.

doi:10.1508/cytologia.42.401

Cited by 15 publications

(21 citation statements)

References 40 publications

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“…The univalent is either a chromosome which altogether failed to pair at zygotene or one which paired to form a bivalent but whose two component chromosomes separated at diplotene because of the absence of chaisma formation between them, or else it is due to precocious anaphasic separation of bivalent (Sarbhoy 1977). In CT 2 , some PMCs showed open types of configurations that suggested the involvement of a sufficient length of the pairing segments, and in CT 3 , few PMCs showed closed configurations which may be the result of short pairing segments (Müller 1976).…”

Section: Discussionmentioning

confidence: 99%

Radiation-Induced Reciprocal Translocations in Safflower (Carthamus tinctorius L.)

Verma

Shrivastava

2014

CYTOLOGIA

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Summary Seeds of Carthamus tinctorius L. (2n=24), an oil yielding plant, were treated with different doses (5, 10, 15, 20, 25 kR) of gamma rays. Three translocation heterozygotes were observed at meiotic division for 10-and 25-kR doses. The induced translocation heterozygotes showed a ring or chain of four chromosomes in most of the cells at diakinesis/metaphase I. The induced mutants showed unequal distribution at anaphase I, reduced vigour, delayed flowering, low flower number, low pollen fertility, and low seed sets as compared to control plants. Induction of permanent chromosomal structural changes may also sometime bring out favorable morphological variation. It is expected that the mutant, when established, could be used in further cytological and breeding programs.

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Section: Discussionmentioning

confidence: 99%

Radiation-Induced Reciprocal Translocations in Safflower (Carthamus tinctorius L.)

Verma

Shrivastava

2014

CYTOLOGIA

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“…85 AMERICAN JOURNAL OF BOTANY Federov, 1974;G ϭ Goldblatt, 1981b;G1 ϭ Goldblatt, 1984;G2 ϭ Goldblatt, 1985;G3 ϭ Goldblatt, 1988;G4 ϭ Goldblatt, 1990;G5 ϭ Goldblatt, 1991;G6 ϭ Goldblatt, 1994;L ϭ Lackey, 1979, M ϭ Moore, 1973. Tschechow and Kartaschowa, 1932 in L;Singh et al, 1971 in G4;Biswas and Dana, 1976 in G;Sarbhoy, 1977Sarbhoy, in G, 1978Sarbhoy, in G, 1978aSarbhoy, in G, 1980 in G1; Sinha and Roy, 1979 in G 1. 11 Biswas and Dana, 1976 in G; Sarbhoy, 1978Sarbhoy, in G, 1978a 22 Karpetschenko, 1925 in L;Shibata, 1962 in F;Kodakama, 1967Kodakama, in F, 1970Ayonoadu, 1974 in G1;Meshram, 1977 in G1; Sinha and Roy, 1979 in G1;Kodama et al, 1989 in G5.…”

Section: Methodsmentioning

confidence: 98%

Karyotypic studies on species of Phaseolus (Fabaceae: Phaseolinae)

Mercado-Ruaro

Delgado‐Salinas

1998

American J of Botany

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Ten karyotypes of Phaseolus were analyzed. Possible directions of karyological evolution of those species are suggested. All species studied have karyotypes composed exclusively of metacentric and submetacentric chromosomes, except P. filiformis with all metacentrics, and P. chiapasanus with one pair of subtelocentric chromosomes. Secondary constrictions and satellites are common among species studied. Phaseolus leptostachyus, P. micranthus, and P. macvaughii are considered as aneuploids with 2n= 20, whereas the rest of the species have 2n= 22.

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“…The chromosomes may fail to pair because of the alteration of linearity of genes due to translocation and inversion induced by mutagenic treatments so that at early prophase homologous chromosomes do not lie side by side. According to Sarbhoy (1977), the univalent is either a chromosome which altogether failed to pair at zygotene, which paired to form a bivalent, or its two-component chromosomes separated at diplotene because of the absence of chiasma formation. Alternatively, it may result from early anaphasic separation of bivalent.…”

Section: Meiotic Analysismentioning

confidence: 99%

EMS, sodium azide and gamma rays induced meiotic anomalies in Delphinium malabaricum (Huth) Munz

2013

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Meiotic cell division is a dynamic cellular process controlled by a large number of genes that act from premeiotic to postmeiotic mitosis. Mutation in these genes may cause anomalies that impair plant fertility. In this study, an attempt has therefore been made to understand the effects of ethyl methane sulfonate (EMS), sodium azide (SA) and gamma rays on the meiotic configuration of Delphinium malabaricum. The results demonstrated that the mutagens cause various types of cytological aberrations, such as univalents, chromatin bridges, laggards, fragments, stickiness and multinucleated cells. The maximum aberrations were found at higher doses/concentrations of the mutagens. The highest percentage of pollen mother cells showing abnormalities was induced by EMS followed by gamma rays and SA. The mutagen impact on chromosomal anomalies increased the frequency of pollen sterility.

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Cytogenetical Studies in the Genus <i>Phaseolus</i> Linn

Cited by 15 publications

References 40 publications

Radiation-Induced Reciprocal Translocations in Safflower (Carthamus tinctorius L.)

Radiation-Induced Reciprocal Translocations in Safflower (Carthamus tinctorius L.)

Karyotypic studies on species of Phaseolus (Fabaceae: Phaseolinae)

EMS, sodium azide and gamma rays induced meiotic anomalies in Delphinium malabaricum (Huth) Munz

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