Bolting in some carrot populations
作者:
B. D. DOWKER,
J. C. JACKSON,
期刊:
Annals of Applied Biology
(WILEY Available online 1975)
卷期:
Volume 79,
issue 3
页码: 361-365
ISSN:0003-4746
年代: 1975
DOI:10.1111/j.1744-7348.1975.tb01592.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
SUMMARYGenetic differences in bolting resistance between types, between varieties within types and within varieties were demonstrated in some Chantenay and Autumn King carrots and populations derived from crosses between them. The Chantenay type gave a higher proportion of bolters than the Autumn King type. Effects of sowing date and plant density on bolting were also demonstrated, later sowing and higher densities giving lower proportions of bolters. Genotype‐environment interactions were found and the responsiveness of the varieties to environment characterized by linear regression coefficients derived from a joint regression analysis. The most responsive variety tested was Red Cored Chantenay and the least responsive Rialto Improved. Implications of these findings for the breeding of new varieties with earlier harvest periods, and also for the seed multiplication of existing varieties are discusse
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