scholarly journals Inheritance of Resistance to Common Bacterial Blight in Tepary Beans

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 839F-840
Author(s):  
A. Dursun ◽  
D.P. Coyne ◽  
M.F. Mohamed ◽  
G. Jung
Keyword(s):  
Phaseolus Vulgaris ◽  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Transgressive Segregation ◽  
Inheritance Of Resistance ◽  
Common Bacterial Blight ◽  
Common Beans ◽  
Serious Disease ◽  
Different Strains ◽  
Dominant Genes

Common bacterial blight, incited by the bacterium Xanthomonas campestris pv. phaseoli (Xcp), is a serious disease of common beans [Phaseolus vulgaris (P. v.)]. Some tepary beans (P. acutifolius) are resistant (R) to Xcp and used to breed P. v. with R to Xcp. The objective was to determine the inheritance of the reaction to different strains of Xcp in crosses between susceptible (S) and R tepary lines. The parents, F2, and F3 populations from six tepary crosses involving 3 R × S, 1 R × moderately (M) R, and 2 R × R were inoculated with Xcp strains EK-11, LB-2, and SC-4A. Different single dominant genes controlled the reaction to different Xcp isolates in R × S crosses. Coupling linkage was detected between the genes controlling the reactions to each of the Xcp strains in the crosses NE #4B(s) × NE #19(R) and NE #4B(S) × CIAT-640005(R), except for NE #8A(MR) × NE #4B(S) with strains EK-11 and LB-2 and EK-11 and SC-4A. Transgressive segregation for S was observed in the F2 and F3 NE #8A × NE #8B(R), indicating that the parents possessed different genes for R. No segregation for reactions occurred n the F2 NE #8B × NE #19 and NE #19 × CIAT-640005, indicating that these parents possessed the same genes for R to the three strains.

scholarly journals Inheritance of Resistance to Common Bacterial Blight in Four Tepary Bean Lines

1999 ◽  
Vol 124 (1) ◽  
pp. 24-27 ◽  
Author(s):  
Carlos A. Urrea ◽  
Phillip N. Miklas ◽  
James S. Beaver
Keyword(s):  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Dominant Gene ◽  
Minor Effect ◽  
Inheritance Of Resistance ◽  
Common Bacterial Blight ◽  
Tepary Bean ◽  
Multiple Resistance Genes ◽  
Dominant Genes ◽  
Effect Gene

High levels of resistance to common bacterial blight caused by Xanthomonas campestris pv. phaseoli (Smith) Dye (Xcp) have been observed for tepary bean (Phaseolus acutifolius A. Gray var. latifolius Freeman). However, the inheritance of resistance from this source is unknown for many lines. The inheritance of common bacterial blight resistance was studied in four tepary bean lines crossed with the susceptible tepary bean MEX-114. Progenies were inoculated with a single Xcp strain 484a. Segregation ratios in the F2 generation suggested that resistance in Neb-T-6-s and PI 321637-s was governed by one dominant gene, and Neb T-8a-s had two dominant genes with complementary effects. These hypotheses for inheritance of resistance were supported by various combinations of F1, F3, BC1Pn segregation data in all lines except PI 321637-s where an additional minor-effect gene with recessive inheritance was indicated. Generation means analyses corroborated that multiple resistance genes were present in PI 321638-s. Lack of segregation for susceptibility among testcrosses for allelism between Neb-T-6-s/PI 321637-s, Neb-T-6-s/Neb-T-8a-s, PI 321637-s/Neb-T-8a-s, and PI 321637-s/PI 321638-s, suggested that one or more loci conditioning resistance to common bacterial blight were in common across the four tepary lines.

scholarly journals A Radiation-induced Mutant with Resistance to Common Bacterial Blight Disease in Common Beans

HortScience ◽  
1995 ◽  
Vol 30 (3) ◽  
pp. 577-578 ◽  
Author(s):  
Mohamed F. Mohamed ◽  
Dermot P. Coyne ◽  
Paul E. Read
Keyword(s):  
Phaseolus Vulgaris ◽  
Dominican Republic ◽  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Common Bacterial Blight ◽  
Common Beans ◽  
Radiation Induced ◽  
Bacterial Blight Disease ◽  
Blight Disease ◽  
Induced Mutant

The leaf reaction of the Phaseolus vulgaris L. germplasm—UNECA (M6 mutant derived from the cultivar Chimbolito, Costa Rica), `Chimbolito', BAC-6 (Brazil), XAN-159 (Centro Internacional de Agricultura Tropical, Cali, Colombia), and `PC-50' (Domican Republic)—to Xanthomonas campestris pv. phaseoli strain V4S1 (Dominican Republic) were determined in two replicated trials conducted in a greenhouse in Lincoln, Neb. (Feb.–Mar. and July–Aug. 1993). `PC-50' and `Chimbolito' were susceptible to Xcp strain V4S1 in both tests. UNECA, BAC-6, and XAN-159 had similar levels of resistance to Xcp in the July to August trial. However, in the February to March trial, the resistance of UNECA was greater than that of BAC-6 but less than that of XAN-159.

scholarly journals Coinoculation Effects of the Pathogens Causing Common Bacterial Blight, Rust, and Bean Common Mosaic in Phaseolus vulgaris

1990 ◽  
Vol 115 (2) ◽  
pp. 319-323 ◽  
Author(s):  
H.Z. Zaiter ◽  
D.P. Coyne ◽  
J.R. Steadman
Keyword(s):  
Phaseolus Vulgaris ◽  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Bean Common Mosaic Virus ◽  
Host Susceptibility ◽  
Uromyces Appendiculatus ◽  
Common Bacterial Blight ◽  
Dry Bean ◽  
Screening For Resistance ◽  
Prior Infection

Ten dry bean (Phaseolus vulgaris L.) cultivars/lines with differential reactions to rust were used in growth chamber experiments to determine rust [Uromyces appendiculatus (Pers.) Unger var. appendiculutus, (U a)], and common bacterial blight Xanthomonas campestris pv. phaseoli (E.F. Sm.) Dews. (X c p)] reactions on leaves when coinoculated with both pathogens. The X c p-U a necrosis symptoms were very different from those caused by X c p alone. Depending on the level of host susceptibility to rust, the X c p reaction remained confined within the rust pustule or spread beyond the pustule area, causing a necrosis of the entire leaf. Prior infection of bean seedlings with bean common mosaic virus (BCMV), NY-15 strain, reduced rust pustule size, but did not affect the reaction to X c p. Screening with X c p and BCMV can be done at the same time during the early vegetative stage, but the interactions of U a with X c p and of BCMV with U a need to be considered in screening for resistance.

scholarly journals Field Reaction of Landrace Components of Red Mottled Beans to Common Bacterial Blight

HortScience ◽  
1992 ◽  
Vol 27 (1) ◽  
pp. 50-51 ◽  
Author(s):  
James S. Beaver ◽  
James R. Steadman ◽  
Dermot P. Coyne
Keyword(s):  
Puerto Rico ◽  
Phaseolus Vulgaris ◽  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Field Experiments ◽  
Common Bacterial Blight ◽  
Sources Of Resistance ◽  
Growing Seasons ◽  
Field Reaction ◽  
The Mean

Field reaction of 25 red mottled bean (Phaseolus vulgaris L.) genotypes to common bacterial blight [Xanthomonas campestris pv. phaseoli (Smith) Dye] was evaluated in Puerto Rico over 2 years. The average disease severity (percent leaf area with symptoms) was similar over years. The determinate red mottled genotypes had almost twice as much disease as indeterminate genotypes. Eight of the indeterminate genotypes had significantly less disease than the mean of the field experiments. These genotypes may serve as useful sources of resistance to common bacterial blight. The size of the chlorotic zone around necrotic lesions varied between growing seasons, showing that environment can influence the expression of common bacterial blight symptoms.

Gene Estimation, Associations of Traits, and Confirmation of QTL for Common Bacterial Blight Resistance in Common Bean

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 499e-499
Author(s):  
Soon O. Park ◽  
Dermot P. Coyne ◽  
Geunhwa Jung
Keyword(s):  
Common Bean ◽  
Phenotypic Variation ◽  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Major Gene ◽  
Flower Color ◽  
Common Bacterial Blight ◽  
Total Phenotypic Variation ◽  
Recombinant Inbred Population ◽  
Serious Disease

Common bacterial blight, incited by Xanthomonas campestris pv. phaseoli (Xcp), is a serious disease of common bean(Phaseolus vulgaris L.). Gene estimation, associations of traits, and confirmation of QTL for resistance to Xcp were investigated in a recombinant inbred population derived from the backcross BC2F6 PC-50 (susceptible to Xcp) × XAN-159 (resistant to Xcp). One or two genes from XAN-159 controlled leaf resistance to Xcp. One major gene from XAN-159 was involved in controlling pod resistance to Xcp. Low (+0.24) to intermediate (+0.57 and +0.75) Pearson correlations were observed between leaf and pod reactions to Xcp. Purple flower color was associated with leaf and pod resistance to Xcp but not days to flower. One to 2 QTLs explained from 20 to 51% of the total phenotypic variation for leaf reactions to 5 Xcp strains. Two QTLs explained from 20 to 22% of the total phenotypic variation for pod reactions to Xcp strains EK-11 and DR-7. A marker BC437.1050 was associated with leaf and pod resistance to 5 Xcp strains in nearly all experiments, and accounted for 13% to 45% of the phenotypic variation for these traits. A unassigned marker D13.1000 was associated with only pod resistance to Xcp strains EK-11 and DR-7. Gene number (1 or 2) estimations and number of QTL (1 or 2) detected for resistance to Xcp generally agree. The confirmed marker BC437.1050 is expected to be useful in breeding programs for resistance to Xcp.

scholarly journals Confirmation of Molecular Markers and Flower Color Associated with QTL for Resistance to Common Bacterial Blight in Common Beans

1999 ◽  
Vol 124 (5) ◽  
pp. 519-526 ◽  
Author(s):  
Soon O. Park ◽  
Dermot P. Coyne ◽  
Nedim Mutlu ◽  
Geunhwa Jung ◽  
James R. Steadman
Keyword(s):  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Rapd Markers ◽  
Rapd Marker ◽  
Flower Color ◽  
Common Bacterial Blight ◽  
Backcross Population ◽  
Leaf Resistance ◽  
Group 5 ◽  
Serious Disease

Common bacterial blight, incited by Xanthomonas campestris pv. phaseoli (Xcp) is a serious disease of common bean (Phaseolus vulgaris L.). Randomly amplified polymorphic DNA (RAPD) markers and flower color (V gene) previously were reported to be associated with six quantitative trait loci (QTL) affecting leaf and pod resistance to Xcp. However, the markers for the QTL were not confirmed in different populations and environments to indicate their merit in breeding. The objective was to determine if the associations of RAPD markers and the V gene with QTL for leaf and pod resistance to Xcp in a recombinant inbred (RI) backcross population from the cross BC2F6 `PC-50' × XAN-159 and for leaf resistance to Xcp in an F2 population from a different cross pinto `Chase' × XAN-159 could be confirmed. One or two genes from XAN-159 controlled leaf and pod resistance to Xcp. Among six QTL previously detected, five in the RI backcross population and three in the F2 population were confirmed to be associated with resistance to Xcp. The V gene and RAPD marker BC437.1050 on linkage group 5 were most consistently associated with leaf and pod resistance to two to five Xcp strains in the RI backcross population and with leaf resistance to two Xcp strains in the F2 population. One to three QTL affecting leaf and pod resistance to Xcp accounted for 22% to 61% of the phenotypic variation. Gene number (one to two) estimations and number of QTL (one to three) detected for leaf and pod resistance to Xcp in the RI backcross population were generally in agreement. The marker BC437.1050 and V gene, along with other resistance genes from other germplasm, could be utilized to pyramid the different genes into a susceptible or partially resistant bean line or cultivar to enhance the level of resistance to Xcp.

scholarly journals The genetic background of resistance to common bacterial blight in newly identified common bean lines on the basis of inheritance studies

2000 ◽  
Vol 6 (1) ◽  
Author(s):  
E. Mergenthaler ◽  
Bisztray Gy.
Keyword(s):  
Common Bean ◽  
Genetic Background ◽  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Resistance Breeding ◽  
Inheritance Of Resistance ◽  
Common Bacterial Blight ◽  
Phaseolus Vulgaris L ◽  
Coupling Phase ◽  
Recessive Genes

Common bacterial blight (CBB), caused by Xanthomonas campestris pv. phaseoli (Xcp). is a major disease problem of common bean (Phaseolus vulgaris L.). The inheritance of resistance in Xrl and Xr2 lines to two isolates of Xcp was studied in the F2 and F3 popu­lations from the crosses between these lines and the Masay variety (susceptible to Xcp). Segregation patterns indicated that different single recessive genes presumably in coupling phase linkage determined the resistance to the HUN and EK-1 1 strains of Xcp in both lines. The presence of some minor, modifying genes beside the monogenic genetic background of resistance was also observed. Xrl and Xr2 lines represent valuable new monogenic genetic sources in resistance breeding to CBB.

scholarly journals Sources of Resistance to Common Bacterial Blight and Rust in Elite Phaseolus vulgaris L. Germplasm

HortScience ◽  
1993 ◽  
Vol 28 (6) ◽  
pp. 644-646 ◽  
Author(s):  
E. Arnaud-Santana ◽  
M.T. Mmbaga ◽  
D.P. Coyne ◽  
J.R. Steadman
Keyword(s):  
Phaseolus Vulgaris ◽  
Common Bean ◽  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Uromyces Appendiculatus ◽  
Common Bacterial Blight ◽  
Phaseolus Vulgaris L ◽  
Sources Of Resistance ◽  
The Common

We studied leaf and pod reactions of 18 Phaseolus vulgaris germplasm lines (three temperate and 15 tropical) to four Xanthomonas campestris pv. phaseoli (XCP) (Smith) Dye strains and seven Uromyces appendiculatus (UA) (Pers.) Unger races. Line × XCP interaction was significant for leaf and pod reactions. The common bean lines XAN-159, BAC-6, and XAN-112 had the best combined leaf and pod resistance to XCP. Line × UA race interactions were significant (P = 0.05). Lines IAPAR-14 and BAC-6 had the best combined resistance to XCP and UA.

scholarly journals HERITABILITIES OF SEED TRANSMISSION AND LEAF AND POD REACTION TO COMMON BLIGHT, LEAF REACTION TO WEB BLIGHT, PLANT ARCHITECTURE, AND THEIR ASSOCIATIONS IN DRY BEANS (PHASEOLUS VULGARIS)

HortScience ◽  
1992 ◽  
Vol 27 (6) ◽  
pp. 597c-597
Author(s):  
E. Arnaud-Santana ◽  
D.P. Coyne ◽  
J.R. Steadman ◽  
A.K. Vidaver ◽  
K.M. Eskridge ◽  
...  
Keyword(s):  
Phaseolus Vulgaris ◽  
Dominican Republic ◽  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Plant Architecture ◽  
Seed Transmission ◽  
Quantitative Inheritance ◽  
Common Bacterial Blight ◽  
Thanatephorus Cucumeris ◽  
Web Blight

Heritabilities (H) of seed transmission and leaf and pod reactions to common bacterial blight (CBB) Xanthomonas campestris pv. phaseoli (Xcp) and to web blight (WB) Thanatephorus cucumeris (Tc) were studied. The reaction to CBB was quantitatively inherited. H values of .36, .46, and .34 for leaf reaction, .14, .12, and .27 for pod reaction, .53, .26, and .36 for seed transmission were estimated based on variation of F6 lines derived from bean crosses 'PC-50' × XAN-159, 'PC-50'× BAC-6, and 'Venezuela 44' × BAC-6 (greenhouse, NE). No significant correlations were detected between leaf and pod reactions or between pod reaction and seed transmission. Quantitative inheritance patterns were observed for leaf reactions to Xcp, Tc, and architecture (AR) in F6lines from the cross BAC-6 × HT 7719 (field, Dominican Republic). H values of .23 (CBB), .14 (WB), and .30 (AR) were obtained. No significant correlations were detected between CBB with WB or AR. A low correlation (+.22) was found between WB and AR.

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