Genotypic differences in percent brix of stalk juice and its relationship with yield associated traits in forage corn (Zea mays L.)
1994
Koinuma, K. (Kyushu National Agricultural Experiment Station, Chikugo, Fukuoka (Japan)) | Inoue, Y. | Kato, A.
Recently, it has been reported that percent Brix of stalk juice is positively and highly related to stover digestibility in forage corn. In this study, genotypic differences in percent Brix of stalk juice among inbreds and F1 hybrids, its relationship between hybrids and their parental inbreds, and correlation of percent Brix of stalk juice with the traits related to yield in hybrids were investigated. Percent Brix of stalk juice varied significantly among inbreds and also among hybrids. High percent Brix was found more frequently in flint inbreds and dent x flint hybrids than in dent inbreds and dent x hybrids. The positively significant correlation between hybrids and mid-parents indicates that percent Brix is genetically controlled and that inbreds with high percent Brix are promising potential of the development of hybrids with high stover digestibility. Percent Brix of stalk juice was not correlated with maturity of hybrids but with dry matter content of stover and yields of stover and whole plant. Considering the negative correlation between percent Brix and dry matter ear content, careful selection for higher percent Brix is required to avoid loss of ear and/or grain yield
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