A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max).

BIONE, N. C. P.; PAGLIARINI, M. S.; ALMEIDA, L. A. de

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Campo DC	Valor	Idioma
dc.contributor.author	BIONE, N. C. P.	pt_BR
dc.contributor.author	PAGLIARINI, M. S.	pt_BR
dc.contributor.author	ALMEIDA, L. A. de	pt_BR
dc.date.accessioned	2011-04-10T11:11:11Z	pt_BR
dc.date.available	2011-04-10T11:11:11Z	pt_BR
dc.date.created	2003-11-19	pt_BR
dc.date.issued	2002	pt_BR
dc.identifier.citation	Hereditas, Lund, v. 136, n. 2, p. 97-103, 2002.	pt_BR
dc.identifier.uri	http://www.alice.cnptia.embrapa.br/alice/handle/doc/468651	pt_BR
dc.description	A spontaneous desynaptic mutation, affecting only microsporogenesis and causing pollen sterility, has been detected in BR97-12986H, a line of the official Brazilian soybean breeding program. In this male-sterile, female-fertile mutant, up to metaphase II, the meiotic behavior was similar to that described for the st series of synaptic mutants previously reported in soybean. Besides many univalents, few or total absence of bivalents were recorded in diakinesis. Bivalents presented one or two terminal chiasmata, while univalents retained the sister chromatid cohesion. Bivalents and most univalents congregated at the equatorial metaphase plate, although univalents frequently migrated to the poles prematurely. Laggards resulting from delay in chiasmata terminalization were also recorded. Distinctly different in their behavior from st series soybean mutants, telophase I-originated micronuclei of different sizes organized their own spindle in the second division. This behavior contributed towards an increase in genome fractionation. Several microspores and microcytes of different sizes were recorded at the end of meiosis. Pollen sterility was estimated at 91.2 %. Segregation ratio for sterility in this line and its progenies reached 3:1. Allelism tests with st series of synaptic mutants are in progress. The importance of male-sterile, female-fertile mutations for soybean breeding programs is discussed.	pt_BR
dc.language.iso	eng	eng
dc.rights	openAccess	eng
dc.title	A new and distinctive male-sterile, female-fertile desynaptic mutant in soybean (Glycine max).	pt_BR
dc.type	Artigo de periódico	pt_BR
dc.date.updated	2017-07-28T11:11:11Z	pt_BR
dc.subject.thesagro	Melhoramento	pt_BR
dc.subject.thesagro	Soja	pt_BR
riaa.ainfo.id	468651	pt_BR
riaa.ainfo.lastupdate	2017-07-28	pt_BR
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