Cytological Studies in the Genus Ribes L

Meurman, O.

doi:10.1111/j.1601-5223.1928.tb02491.x

“…In Trichosrrnthes dioica ROXB., a pair of heteromorphic chromosomes in male, presumed to be related to dioecism was earlier reported (PATEL 1952) and later questioned by WESTER- GAARD (1958 1987,1988) in this species, whereas in Trichosanthes lepinianu (NAuD.) STOKES 1937STOKES 1937STOKES 1937SUGIURA 1927PISEK 1924PISEK 1923STEINDL 1935MCWILLIAMS 1930WULFF 1937SCHATZ (reported by CORRENS 1928) NAKAJIMA 1937LINDSAY 1929KUHN 1928, 1930a, b CHATTOPADHYAY 1989: JOSHI & RAO 1935SHARMA & BHATTACHARYYA 1955LINDSAY 1929CHATTOPADHYAY 1989JOSHI & RAO 1935;SHARMA & BHATTACHARYYA 1955CHATTOPADHYAY 1989CHATTOPADHYAY 1989: SHARMA & BHATTACHARYYA 1955MEURMAN 1925MEURMAN 1928MEURMAN 1928SZTAJGERWALDOWNA 1929YAMAPOLSKY 1925CHATTOPADHYAY & SHARMA 1988MUKHERJEE 1974MUKHERJEE 1974MUKHERJEE 1974KOBEL 1929KOBEL 1929KOBEL 1929BUNTEN 1929DATTA 1971LINDSAY 1930 MEURMAN 1929;SINOTO 1929;SUGIURA 1927;YAMAMO...…”

mentioning

confidence: 78%

Sex determination in dioecious species of plants

Sharma

¹

,

Chattopadhyay

²

1991

Feddes Repertorium

20

0

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The review deals with the previous and present data on sexchromosomal mechanisms in the plant system ranging from Bryophytes to Angiosperms. Despite widespread unisexuality, only a few species have well defined heteromorphic chromosomes, heterogamety being present either on the male or on the female side. Reversion of sex through chemical treatment in unisexual species with homomorphic chromosomes indicates a delicate balance between sex determining genes and physiological set up in such species. In heteromorphic types, in majority of cases, Y is generally longer than X and the male tendency of Y is stronger than the female tendency of X. Even though heterochromaticity is associated, the amount of DNA may or not differ in two sexes. Sex chromosomes may often be nucleolar. With the gradual polyploidization or aneuploidy, there is often changeing sexuality indicating distinct sex‐chromosomeautosomal balance for sex determination. Evidences suggest that the change from bisexuality to unisexuality and homomorphicity to heteromorphicity in chromosomes had been a short step in evolution possibly occurring in the recent past. The potential, of banding technique and X‐ray fragmentation, in locating specific sex determining segments, has been indicated.

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“…Wie bereits MEURMAN (1928) und ZIELINSKI (1953) feststellten, ist das Grundschema uberall dasselbe. Wie bereits MEURMAN (1928) und ZIELINSKI (1953) feststellten, ist das Grundschema uberall dasselbe.…”

Section: Materials Und Methodenunclassified

“…Bei der Beschreibung der Arthybriden innerhalb der Gattung Ribes pflegt man diese in intra-und intersektionelle Hybriden einzutdlen (MEURMAN, 1928;BAUER, 1955;NILSSON, 1959). In der Regel sind Hybriden zwischen Arten, die verschiedenen Sektionen der Gattung angehoren, vollstandig oder fast vollstandig steril.…”

Section: Arthybridenunclassified

“…Das ware nach der von MEURMAN (1928) und TISCHLER (1927 gegebenen Deutung ein Hinweis darauf, dass zumindtst bei diesen Bivalenten die Paarung allosyndetisch ist, ein aber nicht zuletzt wegen der verhaltnismassig geringen Grosse der Chromosomen ziemlich unsicheres Argument. 10).…”

Section: Bei Einem Nachkommling Dieses Bastards Der Nach Zwei Generaunclassified

“…Danach wurden bei den untersuchten Arthybriden die hochsten Paarungsfrequenzen fast ausnahmslos von demselben Verfasser gefunden. S. 170) gefunden wurden, deuten in diese Richtung MEURMAN (1928). Diese Erscheinung kann als Desynapsis bezeichnet werden, obwohl damit ursprunglich das Auseinanderf allen von Paarungsverbanden wahrend des Pachytans und Diplotans gemeint ist(SHARP, 1934; LI, PAO und Lr, 1945).…”

unclassified

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Cytologische Untersuchungen an Diploiden Arten Und Arthybriden Der Gattung Ribes L.

Goldschmidt¹

2009

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Sex determination in dioecious species of plants

Sharma¹,

Chattopadhyay²

1991

Feddes Repert

0

View full text Add to dashboard Cite

The review deals with the previous and present data on sexchromosomal mechanisms in the plant system ranging from Bryophytes to Angiosperms. Despite widespread unisexuality, only a few species have well defined heteromorphic chromosomes, heterogamety being present either on the male or on the female side. Reversion of sex through chemical treatment in unisexual species with homomorphic chromosomes indicates a delicate balance between sex determining genes and physiological set up in such species. In heteromorphic types, in majority of cases, Y is generally longer than X and the male tendency of Y is stronger than the female tendency of X. Even though heterochromaticity is associated, the amount of DNA may or not differ in two sexes. Sex chromosomes may often be nucleolar. With the gradual polyploidization or aneuploidy, there is often changeing sexuality indicating distinct sex‐chromosomeautosomal balance for sex determination. Evidences suggest that the change from bisexuality to unisexuality and homomorphicity to heteromorphicity in chromosomes had been a short step in evolution possibly occurring in the recent past. The potential, of banding technique and X‐ray fragmentation, in locating specific sex determining segments, has been indicated.

show abstract

Cytological Studies in the Genus Ribes L

Cited by 51 publications

References 24 publications

Sex determination in dioecious species of plants

Sex determination in dioecious species of plants

Cytologische Untersuchungen an Diploiden Arten Und Arthybriden Der Gattung Ribes L.

Sex determination in dioecious species of plants

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