The Relationship Between Phenotypic Values in Male-sterile Sorghum Parents and in Their F1 Hybrids PDF Download

Author: R.R. Muyco
Publisher:
ISBN:
Category :
Languages : en
Pages : 58

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Book Description
Thirty grain sorghum (Sorghum bicolor (L.) Moench) hybrids were generated by crossing each of ten cytoplasmic male-sterile lines with three diverse tester lines. The parents and their hybrids were grown in four replications at the Central Experiment Station during the 1983-1984 dry season. The study aimed to determine the relationship between the male-sterile parents and their F1 hybrids, identify the appropriate male testers for evaluating the combinig ability of male-seterile parents, and identify sorghum hybrids with potential for comercial use. Agronomic characters measured included grain yield, days to 50% bloming, plant height, 1000-seed weight and average number of seeds per head. The analysis of vriance showed that parental lines as well as their F1 hybrids were all significantly different for the five characters measured. Parental lines contributed a major portion of the total variation. Grain yield was found to be the most heterotic character. Male-sterilie parents were highly correlated with their F1 hybrids for days to 50% blooming, plant height and average number of seeds per head. But F1 hybrids approached their male parent in days to 50% blooming and were generally taller than their parental lines. Correlation values for grain yield and 1000-seed weight were positive but not high enough to be significant. The top yielding male-sterilie lines were positive for general combining ability effects for yield, days to 50% blooming, and average number of seeds per head. These lines were ATX622, (...).