Pollen Storage Effects on Early Seedling Growth in Maize
Maize (Zea mays L.) has been subjected to many generations of deliberate sporophytic selection followed, in each generation, by pollination with excess quantities of fresh pollen. Under this pollination procedure, extreme pollen genotype selection and variance reduction for genetic factors affecting pollen competitive ability could occur. Changes in this pollination scheme may amplify pollen transmission differences in these heterogeneous pollen populations previously exposed to pollen genotype selection. Extended pollen storage at 2°C prior to pollination has produced differential pollen transmission of alleles at various qualitative loci in maize (Pfahler 1974b). This storage effect has not been examined for quantitative characters associated with vigor and heterosis. Early seedling growth has been positively correlated with heterozygosity level and vigor expressed later in the life cycle (Whaley 1952).
KeywordsRoot Length Pollen Tube Growth Coleoptile Length Early Seedling Growth Genetic Improvement Program
Unable to display preview. Download preview PDF.
- Hurd EA (1971) Can we breed for drought resistance? In: Larson KL and Eastin JD (eds.) Drought Injury and Resistance in Crops. Crop Science of America Special Publ. 2, pp. 77–88.Google Scholar
- Pfahler PL (1974b) Fertilization abilty of maize (Zea mays L.) pollen grains. IV. Influence of storage and the alleles at the shrunken, sugary and waxy loci. In Linskens HF (ed) Fertilization in Higher Plants. North Holland, pp. 15–25.Google Scholar
- Sprague, GF, Eberhart SA (1977) Corn breeding. In Sprague GF (ed) Corn and Corn Improvement. American Society of Agronomy Series 18, pp 305–362.Google Scholar
- Snedecor GW (1956) Statistical Methods, Fifth edition. Iowa State Univ. Press, Ames, Iowa.Google Scholar
- Swanson CP, Stadler LJ (1955) The effect of ultraviolet radiation on the genes and chromosomes of the higher organisms. In Hollaender A (ed) Radiation Biolgoy Vol. 2 McGraw-Hill, pp 249–284.Google Scholar
- Whaley WG (1952) Physiology of gene action in hybrids. In Gowen JW (ed) Heterosis. Iowa State Univ. Press, pp. 98–113.Google Scholar