GENETIC VARIATIONS OF INTERSPECIES HYBRIDIZED SOYBEANS IN YIELD CHARACTERISTICS

doi:10.3321/j.issn:1000-7091.1986.03.002

Abstract

Abstract: A total of 5 cross combinations were made between wild (Glycine soja) , semiwild (Glycine gracilis) soybean species and several soybean cultivars (G-lycine max). Variations of agronomic characteristics, genetics and the relationship there of were investigated. The results shew that all the characteristics of the Fl hybrid, with the exception of one-hudred grain weight, have obvious hectcosis. Separation of F2, F3, and F4 hybrids was rather complicated. Super high-yield clones and lines were found, the most important yield characteristics being plant height, number of internodes on the main stem,and number of pods and seeds per plant. These characteristics, though strong in genetics, vary in a wide spectrum, while showing a significant, positive correlation with yield. For certain combinations, there exists obvious positive correlation between one-hundred grain weight and yield. Studies show that it is possible to predict the one-hundred grain weight of the progeny through those of the parents, the formula being: (geometry means) ≤F (one-hundred grain weight) 1/2 (P 1 + P2) (arithmetic means). Significant correlation was found between Fl and F2, as well as between F2 and F3, their coefficients being 0.9450 and 0.7631 respectively. Screening for one-hundred grain weight, therefore, can be made at the Fl stage. In the high-yield X high yield combinations, the probability and practical yield are higher for the progeny-separating, high-yield clones and lines. Thus, early elimination of the combinations is possible. Certain main agronomic characteristics tend very much to evolve. For instance, the stem becomes thicker, while the number of erect and semi-erect types increases. Seed-coat colors of the soybean cultivars (yellow,black, green, brown, double-colored, and a series of transitional colors) appear at the F2 stage. The dark green seedcoat was noticed recently. All of these could show the evolution process of the soybean seedcoat colors.

Key words: Soybean, Fnterspscies hybridization. Characteristics, Genetic variation

Li Ying, Wei Baoguo, Ren Jianhua. GENETIC VARIATIONS OF INTERSPECIES HYBRIDIZED SOYBEANS IN YIELD CHARACTERISTICS[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1986, 1(3): 10-17. doi: 10.3321/j.issn:1000-7091.1986.03.002.

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