Data/hora: 18/06/2024 12:19:22

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 11/09/1997
Data da última atualização: | 21/07/2018
Autoria: | GAMA, E. E. G. e; HALLAUER, A. R.
Afiliação: | EMBRAPA/CNPMS.
Título: | Relation between inbred and hybrid traits in maize.
Ano de publicação: | 1977
Fonte/Imprenta: | Crop Science, Madison, v. 17, n. 5, p. 703-706, 1977.
Idioma: | Inglês
Conteúdo: | We conducted correlation studies between plant and ear traits of inbred lines and single-cross hybrids of maize (Zea mays L.) developed from Iowa Stiff Stalk Synthetic. We included 160 S1 lines and 320 single-cross hybrid produced among the lines by use of the cross-classification mating design. The 160 S1 lines were partitioned into 20 sets of eight lines to produce the 320 single-cross hybrids (16 hybrids per set). Objectives of our study were to determine the relation between plant and ear traits of the inbred lines and their single-cross hybrids and to determine the relation of plant and ear traits of the inbred lines with yield of the single-cross hybrids. Two procedures were used: (1) correlation of inbred lines themselves with means of hybrids that hadone inbred line in common and (2) correlation of the means of two inbred lines with their specific hybrids. Simple and multiple correlations were computed for each set of eight inbred lines and 16 single-cross hybrids and combined across the 20 sets. Simple correlations of plant and ear traits of inbred lines and single-cross hybrids were small in all instances for both procedures when combined across sets. The coefficient of determination (r2) was less than 0.16 in all instances. Correlation for individual sets for all traits ranged from significant (P < 0.01) negative significantly positive. Sampling error was high among individual sets, indicating that small sample sizes can give misleading associations of traits. Multiple correlations of (...)
Palavras-Chave: | Maize.
Thesagro: | Melhoramento; Milho; Zea Mays.
Thesaurus Nal: | breeding.
Categoria do assunto: | G Melhoramento Genético
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (5107-1) - UPC - AP - DD -  -  -  - DIS