Homeotic Floral Mutations

Acquaah, George; Saunders, J. W.; Ewart, Lowell C.

doi:10.1002/9780470650363.ch4

Cited by 1 publication

(1 citation statement)

References 101 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Knowledge of the biological and functional relationships among various measurable attributes allows a more detailed choice of the traits used in making selection (Acquaah et al, 1992). Thus, traits related to the shoot and root system, together with P uptake and use efficiency, can assist in early evaluation or indirect selection methods for higher PUE through speeding the selection process and disregarding less efficient genotypes at an earlier time, concentrating resources on potentially better genotypes (Fritsche-Neto et al, 2010;Machado et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Tropical maize selection indexes genotypes for efficiency in use of nutrients: phosphorus

et al. 2017

View full text Add to dashboard Cite

1Brazil generates an annual demand for more than 2.83 million tons of phosphate fertilizers. Part of this is due to low P use efficiency (PUE) by plants, particularly in current maize cultivars. Thus, the aim of this study was to create indexes that allow accurate selection of maize genotypes with high PUE under conditions of either low or high P availability. The experiment was conducted in a greenhouse (20º45'14"S; 42º52'53"W) at the Universidade Federal de Viçosa in October 2010. We evaluated 39 experimental hybrid combinations and 14 maize inbred lines with divergent PUE under two conditions of P availability. The relative importance of the traits studied was analyzed and estimated by principal component analysis, factor analysis, and establishment of selection indexes. To obtain genotypes responsive to high P availability, the index SI HP (selection index for high phosphorus) = 0.3985 RDM + 0.3099 SDM + 0.5567 RL LAT + 0.2340 PUEb -0.1139 SRS is recommended. To obtain genotypes tolerant to low P availability, the index SI LP (selection index for low phosphorus) = 0.3548 RDM + 0.3996 RL LAT + 0.3344 SDM + 0.0041 SH/RS -0.1019 SRS is suggested.Key words: abiotic stress; Zea mays; plant breeding; early selection. Índices de seleção de genótipos de milho tropical para eficiência no uso de nutrientes: fósforo O Brasil apresenta uma demanda anual de mais de 2,83 milhões de toneladas de fertilizantes fosfatados. Parte disto se deve a baixa eficiência no uso do fósforo (EUP) pelas plantas, especialmente nos atuais cultivares de milho. Assim, objetivou-se foi elaborar índices que permitam a seleção acurada de genótipos de milho eficientes no uso de P para condições de baixa e alta disponibilidade deste nutriente. O experimento foi conduzido em casa de vegetação (20º45'14"S; 42º52'53"W), na Universidade Federal de Viçosa, em outubro de 2010. Foram avaliadas 39 combinações híbridas experimentais e 14 linhagens de milho, divergentes para a eficiência no uso de P, em duas condições de disponibilidade deste nutriente. Foi realizada a análise de importância relativa dos caracteres estudados, estimada por meio do método dos componentes principais, a análise de fatores e confecção dos índices de seleção. Gabriel Gonçalves dos

show abstract

Section: Introductionmentioning

confidence: 99%