Prediction of seed-yield potential of common bean populations

Abreu, Ângela de Fátima Barbosa; Ramalho, Magno Antônio Patto; Santos, João Bosco dos

doi:10.1590/s1415-47572002000300013

Cited by 17 publications

(16 citation statements)

References 10 publications

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“…The method of Jinks and Pooni (1976) allows for estimating the potential, given the mean and genetic variance of early generations, with examples in rice , common bean (Abreu et al, 2002), maize (Toledo and Miranda Filho, 1985), soybean (Toledo, 1987;Triller and Toledo, 1996) and wheat (Snape, 1982).…”

Section: Introductionmentioning

confidence: 99%

Genetic progress after cycles of upland rice recurrent selection

Júnior

Melo

Morais

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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Periodic assessment of the genetic progress made in recurrent selection programs is essential for assessing the evolution of the programs and identifying the main factors that have contributed to this progress. This study aimed to estimate genetic progress in grain yield, plant height and days-to-flowering achieved in the CNA6 population of upland rice (Oryza sativa L.), after four cycles of recurrent selection; and evaluate the genetic potential of this population to generate superior inbred lines after each selection cycle. The experimental data were obtained from progeny yield trials of each recurrent selection cycle. These trials were carried out in two or three locations per cycle, and consisted of S 0:2 progenies and at least three checks. Federer's augmented block design, with one replication on location (the environment), was adopted.Results revealed genetic progress for grain yield and plant height, with total genetic gains of 375.87 kg ha −1 and -3.90 cm, respectively, during the four selection cycles. The annual relative gain observed for grain yield was 1.54 %. The genetic potential of the population was analysed by the expected proportion of superior inbred lines. The standard adopted as the limit for obtaining superior inbred lines was the average of the checks for each trait. The genetic potential for grain yield and plant height increased during the study period. For days-to-flowering, no genetic gain occurred; however, the genetic potential of the population to generate superior inbred lines for this trait was maintained after the selection cycles.

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Section: Introductionmentioning

confidence: 99%

Genetic progress after cycles of upland rice recurrent selection

Júnior

Melo

Morais

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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“…To achieve this goal it is desirable to use highly divergent parents which are not adapted to the desirable growing conditions. Under these conditions, the probability of obtaining a line better than those that already exist is quite small (Abreu et al, 2002). Thus, for advantages to be accumulated over the years the best alternative is to make a cross between lines with proven higher performance for the desirable traits (Rasmusson and Phillips, 1997).…”

Section: Introductionmentioning

confidence: 99%

Breeding common bean populations for traits using selection index

Lima

Abreu

Ferreira

et al. 2015

Sci. agric. (Piracicaba, Braz.)

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A common bean (Phaseolus vulgaris L.) cultivar must combine desirable genotypes for several traits in order to be accepted by producers and consumers. This study aimed to evaluate selection efficiency when segregating bean populations for traits, by means of a selection index, in order to obtain superior progenies for traits considered. A total of 16 populations from the F 4 and F 5 generations were evaluated in 2011 and 2012, respectively. The traits evaluated were plant architecture, plant disease, grain type and yield. Using standard scores (Z), the sum of the four traits (∑Z) was obtained and, based on this information, the best populations were identified. The evaluation of selection effectiveness was performed on 31 progenies from each population. The 496 progenies plus eight controls were evaluated in the F 5:6 and F 5:7 generations for the same traits in July and November 2012, respectively. The selection, using the index based on the sum of standardized variables (∑Z), was efficient for identifying populations with superior progenies for all the traits considered.

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“…bras., Brasília, v.44, n.10, p.1312Brasília, v.44, n.10, p. -1318Brasília, v.44, n.10, p. , out. 2009 sejam derivadas dessa população as melhores linhagens com relação ao porte, pois ela associa média alta e grande número de locos em heterozigose e maior variância entre as linhagens nas gerações sucessivas (F ∞ ) (Abreu et al, 2002).…”

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Índice de seleção para escolha de populações segregantes de feijoeiro-comum

Mendes

Ramalho

Abreu

2009

Pesq. agropec. bras.

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Resumo -Os objetivos deste trabalho foram determinar a viabilidade de uso de um índice de seleção baseado em somatório de variáveis padronizadas no melhoramento genético do feijoeiro-comum e identifi car as populações segregantes mais promissoras em produtividade de grãos, porte da planta e resistência ao acamamento, simultaneamente. Foram avaliadas populações segregantes obtidas por cruzamentos em esquema de dialelo parcial (6x6). Os genitores utilizados foram divididos em dois grupos. No grupo I, foram utilizados genitores com grãos do tipo carioca, de porte semiereto a prostrado. No grupo II, foram utilizados genitores com porte ereto, porém com grãos fora do padrão comercial carioca. As gerações F 2 e F 3 das combinações híbridas foram avaliadas em experimentos com delineamento de blocos ao acaso, com três repetições e semeadura em novembro de 2007 e fevereiro de 2008, respectivamente. Os dados relativos à produtividade de grãos, à nota de porte e à nota de acamamento foram padronizados (Z ij ) por parcela. A partir do somatório de Z ij , obteve-se o índice de seleção para as três características conjuntamente. Constatou-se que o índice de seleção possibilita selecionar populações segregantes superiores, considerando simultaneamente a produtividade de grãos e as notas de porte e de acamamento. As populações segregantes CV III 8511 x BRS 7762 Supremo, CV III 8511 x RP 166 e CV III 8511 x RP 26 são indicadas para programas de melhoramento a fi m de obter linhagens produtivas com plantas eretas e menor acamamento.Termos para indexação: Phaseolus vulgaris, dialelo parcial, padronização de variáveis, população segregante. Selection index for choosing segregating populations in common beanAbstract -The objectives of this work were to determine the viability of using a selection index based on the sum of standardized variables in common bean breeding programs, and to identify the most promising segregating populations for grain productivity, plant growth habit and resistance to lodging simultaneously. Segregant populations obtained by crosses in partial diallel scheme (6x6) were evaluated. Parental genotypes were divided in two groups. Group I comprised parents of the carioca grain type, with semierect to prostate growth habit. Group II comprised parental lines with erect architecture, but with grains not classifi ed as the standard carioca type. The F2 and F3 generations of the obtained hybrid combinations were evaluated in randomized block design, with three replicates and sowing in November 2007 and February 2008, respectively. Data of grain yield, score for plant growth habit and score for lodging were standardized per plot (Z ij ). The selection index for the three characters together was obtained from the Z ij sum. This selection index makes it possible to choose superior segregating populations considering grain yield, scores for plant growth habit, and for lodging simultaneously. Segregating populations CV III 8511 x BRS 7762 Supremo, CV III 8511 x RP 166 and CV III 8511 x RP 26 are identifi ed as promising...

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Prediction of seed-yield potential of common bean populations

Cited by 17 publications

References 10 publications

Genetic progress after cycles of upland rice recurrent selection

Genetic progress after cycles of upland rice recurrent selection

Breeding common bean populations for traits using selection index

Índice de seleção para escolha de populações segregantes de feijoeiro-comum

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