| 摘要 |
A method of producing hybrid plants involves inducing cross-pollination of self-pollinating species by selecting a female plant and a male plant having different genotypes, the female plant having a phenotype of sensitivity to a micronutrient deficiency, and the male plant having a phenotype of male fertility, growing the female plant to sexual maturity in a fertility-selective growth medium deficient for the micronutrient, to produce a plant having female fertility and male sterility, growing the male plant to sexual maturity to produce a plant having high male fertility, cross-pollinating the female plant with pollen from the male plant to produce cross-fertilization with essentially no self-fertilization, raising the female plant to produce hybrid seeds having genetic material from both parents, and harvesting the hybrid seeds. Fertility selective media can be identified by using a set of check genotypes with known responses to a micronutrient deficiency, choosing as the fertility-selective medium those that give desired differences in male sterility between the standard checks. The plants may be wheat and the growth medium may be deficient for boron. The method preferably comprises determining a correlation between boron content of the male reproductive organs by chemical analysis and observation of degrees of male sterility.
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