Inheritance of downy mildew resistance in mature broccoli plants

被引:36
作者
Coelho, PS [1 ]
Monteiro, AA
机构
[1] Estacao Agron Nacl, Dept Crop Prod, P-2785505 Oeiras, Portugal
[2] Univ Tecn Lisboa, Inst Super Agron, P-1349018 Lisbon, Portugal
关键词
Brassica oleracea var. italica; disease resistance; field resistance; Peronospora parasitica (Pers. ex Fr.); Fr;
D O I
10.1023/A:1023008619400
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
The objective of this study was to determine the mode of inheritance of field resistance to downy mildew (Peronospora parasitica (Pers. ex Fr.) Fr.) in broccoli (Brassica oleracea var. italica) at the adult plant stage. The F-1, F-2 and F-3 progeny of resistant and susceptible plants of broccoli were tested in the field under natural infection, in central Portugal, from August to December in two successive years. The plants were evaluated for resistance to downy mildew at maturity using a five-class scale of increasing susceptibility to the disease, which took into account the number of infected leaves and the size of the sporulating lesions. The F-1 was completely resistant, the F-2 segregated a clear 3 resistant: 1 susceptible and the F-3 confirmed the F-2 segregation, which suggests a dominant character controlled by a single locus. This resistance has good potencial for direct use in commercial broccoli breeding or for transfer to other Brassica vegetables.
引用
收藏
页码:65 / 69
页数:5
相关论文
共 18 条
[1]  
BAGGETT JR, 1985, HORTSCIENCE, V20, P782
[2]  
Barnes WC, 1968, HORTSCIENCE, V3, P78
[3]  
Carvalho T., 1996, CRUCIFERAE NEWSL, V18, P104
[4]   The relationship between cotyledon and adult plant resistance to downy mildew (Peronospora parasitica) in Brassica oleracea [J].
Coelho, P ;
Leckie, D ;
Astley, D ;
Crute, IR ;
Bahcevandziev, K ;
Valerio, L ;
Monteiro, A ;
Boukema, I .
BRASSICA 97: INTERNATIONAL SYMPOSIUM ON BRASSICAS, 1998, (459) :335-342
[5]  
COELHO PS, 2000, 3 INT S BRAS, P88
[6]   PLANT-AGE AND ISOLATE SOURCE AFFECT EXPRESSION OF DOWNY MILDEW RESISTANCE IN BROCCOLI [J].
DICKSON, MH ;
PETZOLDT, R .
HORTSCIENCE, 1993, 28 (07) :730-731
[7]  
HOSER-KRAUZE J, 1987, Genetica Polonica, V28, P377
[8]  
Hoser-Krauze Julia, 1995, Journal of Applied Genetics, V36, P27
[9]  
Howe T. K., 1986, Proceedings of the Florida State Horticultural Society, V99, P335
[10]  
Jensen BD, 1999, PLANT PATHOL, V48, P604, DOI 10.1046/j.1365-3059.1999.00388.x