INHERITANCE OF RESISTANCE TO 2 RACES OF LEAF RUST IN DRY EDIBLE BEAN
INHERITANCE OF RESISTANCE TO 2 RACES OF LEAF RUST IN DRY EDIBLE BEAN
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DOI：
10.2135/cropsci1985.0011183x002500030025x
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发表时间：
1985-01-01
期刊：
影响因子：
2.3
通讯作者：
STAVELY, JR
中科院分区：
文献类型：
--
作者：
GRAFTON, KF;WEISER, GC;STAVELY, JR
A study was conducted to determine the inheritance of resistance to races 44 and 52 of leaf rust (causal organism Uromyces appendiculatus (Pers. ex Pers.) Unger var. appendiculatus) in the dry edible bean cultivars T-39, Aurora and Olathe. ''T-39'' and ''Aurora'' each express hypersensitive resistance to race 52 but are susceptible to race 44. ''Olathe'' is hypersensitive resistant to race 44 and susceptible to race 52. Crosses were made between these cultivars and with UI-114, a pinto bean cultivar susceptible to both races. Resistance of F1 progeny and segregation ratios within F2 populations and among F3 progeny from individual F2 plants of crosses with ''UI-114'' indicated that resistance of each race was controlled by a single, dominant gene. Segregation ratios of the F2 population and F3 progeny from individual F2 plants of the cross ''Olathe'' .times. ''T-39,'' inoculated with race 44 only, indicated that complementary dominant genes controlled resistance to race 44. Segregation ratios of genes for resistance to races 44 and 52 in progenies of ''Olathe'' .times. ''Aurora'' indicated independent assortment without epistasis. The following tentative genotypes for rust reaction of the cultivars studied are proposed: ''Olathe''-UraUraUrcUrcurburb; ''T-39''-urauraurcurcUrbUrb. ''Aurora''-urauraUrcUrcUrbUrb; ''UI-144''-urauraUrcUrcurburb.
