ISSN:
1432-2242
Keywords:
Heritability
;
Repeatability
;
Cytoplasmic effects
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Inheritance of first, maximum and average flowering date and percent flowering was investigated in sugarcane crosses involving early, mid, and late flowering parents in all possible combinations. Parental and f1 progeny data were taken on plant crops in 1983 and 1984 and a ratoon crop in 1985. Individuals in 1984 and 1985 were clones of the genotypes used in 1983. Heritabilities within years ranged between 0 and 0.3, indicating only moderate additive genetic variance. Approximately 30% to 50% of the observed variation could be attributed to genetic sources as measured by repeatability estimates. Contribution of female parents was more important than male parents, indicating an important role for cytoplasmic effects in flowering response. Heritabilities based on females were substantially larger than corresponding male estimates. Progeny flowered less frequently and later than parents, suggesting that early, frequent flowering depended on specific gene combinations which were lost during crossing.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00276757
Permalink
