Data/hora: 24/09/2024 13:07:22

Biblioteca(s): 	Embrapa Soja.	
Data corrente: 	24/05/1993	
Data da última atualização: 	26/10/2004	
Autoria: 	GOVIL, J. N.; SINGH, S. P.; MEHRA, R. B.	
Afiliação: 	Division of Genetics, Indian Agricultural Research Institute, New Delhy-110012, India.	
Título: 	Genetic male sterility in pulses and its potential use in breeding - a review.	
Ano de publicação: 	1989	
Fonte/Imprenta: 	In: CONFERENCIA MUNDIAL DE INVESTIGACION EN SOJA, 4., 1989, Buenos Aires. Actas... Buenos Aires: AASOJA, 1989.	
Volume: 	t.2	
Páginas: 	p.935-942.	
Idioma: 	Inglês	
Conteúdo: 	Pulses are predominantly self-pollinated crops. So far only additive genetic variation has been exploited in breeding high yielding pure lines. A number of genetic studies have shown the presence of non-additive genetic variation in pulses, in general and Pigeonpea and Soybean in particular. The identification of genetic male sterility in soybean and pigeonpea has made it possible to explit non-additive genetic variation through the economic production of hybrids. Male sterility caused by single recessive gene has been found useful in facilitating more crossing with less effort in population improvement schemes and in hybrid production. An effective breeding strategy is proposed to enhance the level of recombination. A review of research carried out so far clearly shows the possibility of exploitation of heterosis. It also reveals several areas of research deficiencies warranting more intensive research input in this aspect of pulse improvement. Genetic male sterility in inbreeding cultivars is an outcome of mutation and survival of androsterility alleles in the population. Male sterility conditioned by neclear genes is referred to as genetic male sterility. Possible models for its origin and maintenance in populations are given in Fig. 1. On the average one monogenic recessive ms mutant can be found in a population of about 20,000 plants (Allard, 1953 and Rich, 1945). The elimination of recessive androsterile mutants from the cultivar population depends on the degree of outcrossing prevailing, but even with a 	
Palavras-Chave: 	Macho esteril; Male sterility; Soybean.	
Thesagro: 	Genética; Melhoramento; Soja.	
Thesaurus Nal: 	breeding; genetics; India.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Soja (CNPSO)