Natural Selection in Four Common Bean Traits

Gonçalves, Flávia Maria Avelar; Antônio, Magno; Ramalho, Patto; Barbosa, Ângela de Fátima

doi:10.13082/1984-7033.v01n03a01

Cited by 9 publications

(16 citation statements)

References 9 publications

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“…These factors, associated, promote conditions for a higher grain yield in the culture of beans when they are sown in July. This fact is frequently observed in experiments with the bean culture in the region (GONÇALVES et al, 2001).…”

Section: Resultssupporting

confidence: 57%

Dry matter accumulation in genotypes of bean submitted to different levels of nitrogen

et al. 2009

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The objective of this study was to verify the response of dry matter accumulation in bean lines (Phaseolus vulgaris L.) to different levels of nitrogen fertilizers. Six genotypes ('BRSMG Majestoso', 'Pérola', MA-I-18.13, 'Ouro Negro', 'BRSMG Talismã', and MA-I-2.5) were evaluated in Lavras, testing three N levels (0, 60, and 120 kg/ha) and using ammonium sulphate as N source. The experimental design adopted was the randomized block design in a 6 x 3 factorial structure with three replications and the plots were composed of five 5-m rows. The seeds were sown in November 2005 and July 2006. Total dry mass of five competitive plants was evaluated after 35 days from sowing, harvested from a pre-determined place in the useful area of the plots. This process was repeated every ten days until the harvest. The grain yield was also evaluated in one of the rows of the useful area of the plots. It was observed that regarding the dry mass accumulation, the genotypes did not present different responses at the N levels and the average increase per kg/ha applied N was 6.75 kg/ha grains. The genotype BRSMG Majestoso is the most responsive, with 14.4 kg/ha grains per kg applied N whereas the most tolerant is the MA-I-2.5 with1.8 kg/ha grains per kg N.

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Section: Resultssupporting

confidence: 57%

Dry matter accumulation in genotypes of bean submitted to different levels of nitrogen

et al. 2009

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“…They also ar gue that nat u ral se lec tion may oc cur, but not al ways in the breed ers de sired di rec tion. How ever, this study and oth ers us ing the bean plant (Hamblin, 1977;Gonçalves et al, 2001 andCorte et al, 2002) and rye (Allard, 1988) show that the ac tion of nat u ral se lec tion is to in crease the grain yield, which is highly advan ta geous.…”

Section: \mentioning

confidence: 56%

Natural selection and family X location interaction in the common (dry) bean plant

Pirola¹,

Ramalho²,

Carneiro³

et al. 2002

Genet. Mol. Biol.

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Ab stractNat u ral se lec tion takes place while ad vanc ing gen er a tions of segregant pop u la tions of s elf pol li nat ing spe cies by the pop u la tion (bulk) method. There is ev i dence that it main tains the in di vid u als with greate r grain yield. The ques tion arises whether nat u ral se lec tion pre serves the in di vid u als which are more adapted only to the en vi ron ment where the gen er a tion ad vance oc curred, that is, if it con trib utes to in creas ing the ge no type x en vi ron ment in ter ac tion in the fam ily as sess ment. This study was car ried out to check this hy poth e sis in the com mon bean p lant us ing fam i lies de rived from a seg re gat ing pop u la tion from a cross be tween the Cari oca MG x ESAL 686 culti vars. The seg re gat ing pop u la tions in crease in homozygosity was ob tained by the pop u la tion (bulk) method un til th e F 14 gen er a tion, in three dis tinct lo ca tions in Minas Gerais state: Lavras, Lambari and Patos de Minas. Forty-seven F 14:15 fam i lies were ran domly taken from the pop u la tion in each lo ca tion and later mul ti plied to ob tain F 14:16 fam i lies. These fam i lies were jointly as sessed with three con trols us ing a tri ple 12 x 12 lat tice de sign in the three lo ca tions of gen er a tion ad vance in the wet sea son of 1998/1999. All the es ti mated pa ram e ters showed that while ad vanc ing segre gant pop u la tions by the pop u la tion (bulk) method, nat u ral se lec tion acted to pre serve the in di vid u als which are more adapted to the en vi ron ment in which they were ad vanced.Key words: ge no type x en vi ron ment in ter ac tion, heritability, com mon bean, Phaseolus vulgaris L., nat u ral se lec tion. In tro duc tionSev eral meth ods to ad vance segregant pop u la tions are avail able to breed ers of self pol li nat ing spe cies. The pop u la tion or bulk method is widely used be cause it is versa tile and easy to use. From the F 2 gen er a tion, the plants are har vested (bulked) and their seeds mixed and sam pled to sow and grow the next gen er a tion. This pro cess is re peated un til F 5 , F 6 or even more ad vanced gen er a tions are obtained. Plants are then col lected and their fam i lies (prog enies) are as sessed in rep li cated ex per i ments.Nat u ral se lec tion acts on the segregant pop u la tion dur ing the bulk method ad vance of gen er a tion. The question is whether this se lec tion acts in the di rec tion de sired by the breed ers. It is known that for cer tain traits such as growth habit and cy cle it does not al ways oc cur in the required di rec tion. How ever, it has been proved that nat u ral se lec tion con trib utes to main tain ing the higher yield ing (grain yield) in di vid u als (Hamblin, 1977;Allard, 1988;Corte et al., 2002).An other per ti nent ques tion is whether nat u ral se lection ac tion pre serves the in di vid u als that are more adapted only to the en vi ron ment where the gen er a tions were advanced. Proof of this fact is es pe cially im por tant for trop ical con di tions be cause...

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“…Para a obtenção de uma nova linhagem, são feitas avaliações por várias gerações. Nessa condição, espera-se que a seleção natural atue e que possam ser identificadas as mais adaptadas àquele ambiente particular (Gonçalves et al, 2001;Pirola et al, 2002;Silva et al, 2004). Assim, esperava-se que as linhagens oriundas de um local tivessem maior adaptabilidade e estabilidade no referido local.…”

Section: Resultsunclassified

Implicações da origem das linhagens de feijoeiro na magnitude da interação com ambientes

Silva

Abreu

Ramalho

et al. 2011

Pesq. agropec. bras.

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Resumo -O objetivo deste trabalho foi verificar as implicações da origem de linhagens de feijão na magnitude da interação com ambientes e os fatores ambientais que mais contribuem para esta interação. Implications of the origem of bean lines in the magnitude of the interaction with environmentsAbstract -The objective of this work was to verify the implications of the origens of bean lines in the magnitude of the interaction with environment, and the environmental factors, which contribute most to this interaction. Data from the value of cultivation and use trials of the biennia

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Natural Selection in Four Common Bean Traits

Cited by 9 publications

References 9 publications

Dry matter accumulation in genotypes of bean submitted to different levels of nitrogen

Dry matter accumulation in genotypes of bean submitted to different levels of nitrogen

Natural selection and family X location interaction in the common (dry) bean plant

Implicações da origem das linhagens de feijoeiro na magnitude da interação com ambientes

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