Chromosome Behaviour in &lt;i&gt;Laccifer lacca&lt;/i&gt; (Kerr) Lacciferidae-Coccoidea

Dikshith, T. S. S.

doi:10.1508/cytologia.29.337

Cited by 8 publications

(6 citation statements)

References 13 publications

(20 reference statements)

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“…Here also as in the above cases, the spermatids are all binucleate to begin with, but soon become quadrinucleate due to the fusion of sister cells. The binucleate condition of the spermatids suggests, as in the above instances that the second meiotic division is suppressed cytoplasmically (Dikshith 1964). Once again, as in other lecanoids, each euchromatic nucleus of Laccifer lacca develops an outgrowth which elongates and transforms finally into a sperm within which is incorporated the whole nucleus; and no residue is left behind as in Iceryine coccids.…”

Section: Discussionmentioning

confidence: 70%

“…This structure was confused by many earlier workers (Putnam 1880, Misra 1931, 1931a, Doutt 1949, Magnin 1952, 1955, Dikshith 1962) and all of them called the sperm bundle as a sperm.…”

mentioning

confidence: 91%

“…Very few references are available on the cytology of Laccifer lacca (Dikshith 1932, 1962a, 1964, 1964a, Teotia and Dikshith 1963. Classic researches of many cytologists and chiefly of Ballowitz, Retzius and Koltzoff (Wilson 1925) have shown the innumerable variation of sperm forms met with in various groups of animal kingdom.…”

mentioning

confidence: 99%

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Spermiogenesis in <i>Laccifer lacca</i> (Kerr) (Lacciferidae-Coccoidea)

Dikshith

1966

CYTOLOGIA

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Section: Discussionmentioning

confidence: 70%

“…This structure was confused by many earlier workers (Putnam 1880, Misra 1931, 1931a, Doutt 1949, Magnin 1952, 1955, Dikshith 1962) and all of them called the sperm bundle as a sperm.…”

mentioning

confidence: 91%

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Spermiogenesis in <i>Laccifer lacca</i> (Kerr) (Lacciferidae-Coccoidea)

Dikshith

1966

CYTOLOGIA

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“…This is incompatible with Dikshith's (1964a) claim that one haploid set of chromosomes in K. lacca males is heterochromatic (and, by implication, inactivated) from an early embryonic stage, i.e. This is incompatible with Dikshith's (1964a) claim that one haploid set of chromosomes in K. lacca males is heterochromatic (and, by implication, inactivated) from an early embryonic stage, i.e.…”

Section: Discussionmentioning

confidence: 92%

“…The lac insect Kerria lacca (Kerr) (Syn. The research reported here was undertaken to obtain genetic evidence to test the unorthodox 'Lecanoid' system proposed by Dikshith (1964a). The research reported here was undertaken to obtain genetic evidence to test the unorthodox 'Lecanoid' system proposed by Dikshith (1964a).…”

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confidence: 99%

Genetic evidence of an unorthodox chromosomal system in the lac insectKerria lacca(Kerr)

Chauhan

1970

Genet. Res.

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The colour difference (crimson and yellow) in Kerria lacca (Kerr) was used to test the ' Lecanoid' system of chromosome behaviour proposed on cytological evidence. The colour strains bred true for colour. Reciprocal matings between the colour strains produced only crimson sons and daughters, confirming that the colour difference is not sex-linked and that the male is somatically a diploid. The phenotypes of the F 2 and the backcross generations differed according to the heterozygosity and the direction of cross of the F 2 parents, since heterozygous females produced two kinds of gamete but heterozygous males produced only the maternal kind. Thus, while elimination of the paternal gene and hence chromosome was confirmed during the formation of male sex-cells, demonstration of somatic diploidy of the male is not compatible with a ' Lecanoid' system in K. lacca. Instead, the available cytogenetic evidence is suggestive of a chromosome system with heterochromatization and elimination of the paternal chromosome-set confined to the male germ line.

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