estimativa de capacidades de combinação em gerações iniciais de seleção de batata estimation of the combining ability in early generations of potato selection
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2009
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Abstract
Verificou-se as estimativas das capacidades de combinação de genitores de batata em gerações iniciais de seleção. Os experimentos foram realizados na Embrapa Clima Temperado, Pelotas (RS). Foram avaliadas 20 famílias derivadas de nove genitores cruzados em esquema parcial 4 x 5 (C-1750-15-95; 2CRI-1149-1-78; C-1786-6-96 e 'Eliza'; 'White Lady'; 'Asterix'; 'BP-1'; 'Vivaldi' e 'Ágria'). As famílias foram avaliadas na geração de plântula e na primeira geração de campo, utilizando o delineamento experimental de blocos com tratamentos ao acaso, com três repetições. A parcela consistiu de uma amostra de 15 genótipos de uma família. Nas duas gerações foram avaliados os caracteres rendimento, número e massa média de tubérculo. Os dados foram submetidos às análises de variância conjunta e dialélica parcial. Para rendimento verificou-se efeito gênico predominantemente aditivo, enquanto para número e massa média de tubérculo constatou-se tanto efeito aditivo e não aditivo, igualmente importantes. 2CRI-1149-1-78 e 'White Lady' revelaram-se os genitores mais promissores para os três caracteres, enquanto 'Ágria' destacou-se para massa média. As gerações expressaram estimativas similares de capacidade geral de combinação.
The combining ability of potato genotypes was estimated in early generations of selection. The experiments were carried out at Embrapa Clima Temperado, in Pelotas, Brazil. Twenty potato families derived from nine genotypes crossed in a 4 x 5 partial mating design (C-1750-15-95, 2CRI-1149-1-78, C-1786-6-96 and 'Eliza'; 'White Lady', 'Asterix', 'BP-1', 'Vivaldi' and 'Ágria') were evaluated. The families were evaluated in seedling and first field generation, in a randomized complete block design, with three replications of 15 genotypes. Each plot consisted of a sample of 15 genotypes of a family. In the two generations, yield, number and average tuber weight were evaluated. The data were submitted to analysis of variance and to partial diallel analysis. For yield, the gene additive effects predominated, while for tuber number and average tuber mass, both additive and non additive effects were equally important. 2CRI-1149-1-78 and 'White Lady' showed to be the most promising parents for the three traits, while 'Ágria' revealed superiority for mean tuber weight. The two generations presented similar estimative of general combining ability.
The combining ability of potato genotypes was estimated in early generations of selection. The experiments were carried out at Embrapa Clima Temperado, in Pelotas, Brazil. Twenty potato families derived from nine genotypes crossed in a 4 x 5 partial mating design (C-1750-15-95, 2CRI-1149-1-78, C-1786-6-96 and 'Eliza'; 'White Lady', 'Asterix', 'BP-1', 'Vivaldi' and 'Ágria') were evaluated. The families were evaluated in seedling and first field generation, in a randomized complete block design, with three replications of 15 genotypes. Each plot consisted of a sample of 15 genotypes of a family. In the two generations, yield, number and average tuber weight were evaluated. The data were submitted to analysis of variance and to partial diallel analysis. For yield, the gene additive effects predominated, while for tuber number and average tuber mass, both additive and non additive effects were equally important. 2CRI-1149-1-78 and 'White Lady' showed to be the most promising parents for the three traits, while 'Ágria' revealed superiority for mean tuber weight. The two generations presented similar estimative of general combining ability.
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silva2009horticulturaestimativa
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| Authors | ;Giovani O da Silva;Arione da S Pereira;Velci Q de Souza;Fernando Irajá F de Carvalho;Roberto Fritsche Neto |
| Journal | research on biomedical engineering |
| Year | 2009 |
| DOI |
10.1590/S0102-05362009000300002
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