Heredity and Environmental Regulation of Premature Bolting in Carrot

doi:10.3969/j.issn.1000-7091.2013.03.013

Abstract

Abstract: Premature bolting has become the bottleneck in winter and early spring carrot production． It is useful to understand the mechanism of premature bolting regulation for breeding anti-bolting carrot varieties． A genetic model including additive and dominance effects was used to evaluate the quantitative genetics of premature bolting with the F1 s and F2 s from the reciprocal crosses between Songzi( P1，a wild carrot species) and six cultivars． Phenotypic variance( VP ) and genetic variance components were significant for the ratio of premature bolting of hybrids， and additive variance( VA ) was as the main effect． The ratios of premature bolting of P1 and 7262B( P6) were significantly less in the greenhouse than those in the field and no bolting plants occurred to Amsterdam forcing( P4) in the greenhouse，which may be influenced by low light． Initiation of premature bolting of P1，F1 and F2 were delayed by short day and the ratios decreased significantly． The plants were treated more short days and more affection showed．But there were no affection to parent P4． The same results were found to P1 roots treated with different days of 7 ℃．Premature bolting could all be found to P1 plants treated with 14 d under the temperature of 4 to 13 ℃，and the optimum temperature for vernalization was 7 ℃．

Key words: Carrot, Premature bolting, Genetic, Low temperature, Light

CLC Number:

S631.03

Mao Jihua, Mao Shumin, Zhuang Feiyun, Ou Chenggang, Zhao Zhiwei, Bao Shengyou. Heredity and Environmental Regulation of Premature Bolting in Carrot[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2013, 28(3): 67-72. doi: 10.3969/j.issn.1000-7091.2013.03.013.

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http://www.hbnxb.net/EN/Y2013/V28/I3/67

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