Genetic analysis of resistance to bacterial blight in rice

Genome ◽  
1988 ◽  
Vol 30 (3) ◽  
pp. 299-302 ◽  
Author(s):  
S. C. Prasad ◽  
J. B. Tomar
Keyword(s):  
Resistance Genes ◽  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Dominant Gene ◽  
Recessive Gene ◽  
Susceptible Cultivar ◽  
Inheritance Of Resistance ◽  
Single Recessive Gene ◽  
Clipping Technique ◽  
Mode Of Inheritance

The mode of inheritance of resistance to bacterial blight, Xanthomonas campestris pv. Oryzae was studied in 12 rice cultivars: 'BR51-282-8', 'DV85', 'CAS209', 'Java14', 'IR4613-54-5', 'Zenith', 'IR36', 'Neuli', 'BJ1', 'LZN', 'MRC603-303', and 'D204-1'. These resistance cultivars were crossed with a susceptible tester parent 'TN1'. The plants were inoculated at the maximum tillering stage by the clipping technique. From the reactions of F1, F2, and F3 populations, it was found that resistance in 'LZN', 'MRC603-303', and 'D204-1' was conditioned by a single recessive gene. The resistance in 'BR51-282-8', 'DV85', 'CAS209', 'Javal4', 'IR4613-54-5', 'Zenith', 'IR36', 'Neuli', and 'BJ1' was controlled by a single dominant gene. The allelic relationships of resistance genes in the test cultivars with Xa4 was studied. The Xa4 gene was originally identified and designated in 'IR22'. The resistance genes in the test cultivars were nonallelic to Xa4. The trisomie lines of 'IR36' were crossed with 'Jaya', a highly susceptible cultivar to bacterial blight. The segregation pattern of the F2 and backcross generations revealed that the resistance gene of 'IR36' was located on chromosome 12 of the rice genome.Key words: rice, resistance, bacterial blight, allelic relationship, trisomics.

scholarly journals Inheritance of Resistance to Bacterial Blight in 21 Cultivars of Rice

2003 ◽  
Vol 93 (2) ◽  
pp. 147-152 ◽  
Author(s):  
K. S. Lee ◽  
S. Rasabandith ◽  
E. R. Angeles ◽  
G. S. Khush
Keyword(s):  
Bacterial Blight ◽  
Oryza Sativa L ◽  
Dominant Gene ◽  
Recessive Gene ◽  
Inheritance Of Resistance ◽  
Race 1 ◽  
Group 2 ◽  
Race 2 ◽  
Moderate Resistance ◽  
Group 1

Genetic analysis for resistance to bacterial blight (Xanthomonas oryzae pv. oryzae) of 21 rice (Oryza sativa L.) cultivars was carried out. These cultivars were divided into two groups based on their reactions to Philippine races of bacterial blight. Cultivars of group 1 were resistant to race 1 and those of group 2 were susceptible to race 1 but resistant to race 2. All the cultivars were crossed with TN1, which is susceptible to all the Philippine races of X. oryzae pv. oryzae. F1 and F2 populations of hybrids of group 1 cultivars were evaluated using race 1 and F1 and F2 populations of hybrids of group 2 cultivars were evaluated using race 2. All the cultivars showed monogenic inheritance of resistance. Allelic relationships of the genes were investigated by crossing these cultivars with different testers having single genes for resistance. Three cultivars have Xa4, another three have xa5, one has xa8, two have Xa3, eight have Xa10, and one has Xa4 as well as Xa10. Three cultivars have new, as yet undescribed, genes. Nep Bha Bong To has a new recessive gene for moderate resistance to races 1, 2, and 3 and resistance to race 5. This gene is designated xa26(t). Arai Raj has a dominant gene for resistance to race 2 which segregates independently of Xa10. This gene is designated as Xa27(t). Lota Sail has a recessive gene for resistance to race 2 which segregates independently of Xa10. This gene is designated as xa28(t).

scholarly journals Resistance to Common Bacterial Blight of Bean Introgressed from Phaseolus coccineus

HortScience ◽  
2001 ◽  
Vol 36 (4) ◽  
pp. 750-751 ◽  
Author(s):  
M.M. Welsh ◽  
K.F. Grafton
Keyword(s):  
Resistance Genes ◽  
Bacterial Blight ◽  
Xanthomonas Campestris ◽  
Recessive Gene ◽  
Bacterial Disease ◽  
Symptom Expression ◽  
Common Bacterial Blight ◽  
Bacterial Blight Resistance ◽  
Dry Bean ◽  
Disease Reaction

Common bacterial blight, incited by Xanthomonas campestris pv. phaseoli (Smith) Dye, is a major bacterial disease of dry bean (Phaseolus vulgaris L.). Resistance to common bacterial blight has been identified in other Phaseolus species and resistance genes have been introgressed into P. vulgaris. The objective of this study was to characterize in dry bean the inheritance pattern of common bacterial blight-resistance genes derived from P. coccineus. Two common, bacterial blight-susceptible, dry bean cultivars were crossed with different common, bacterial blight-resistant dry bean lines with resistance derived from P. coccineus. F2 progeny were inoculated with Xanthomonas campestris pv. phaseoli strain F19-W and were scored for disease reaction. The ratio of resistant to susceptible plants for F2 populations did not differ significantly from a 1 resistant: 3 susceptible ratio. The F3 segregation was obtained for only one cross and did not differ significantly from a 1 resistant: 2 heterozygous: 1 susceptible ratio, suggesting that the resistance introgressed from P. coccineus into dry bean was controlled by one recessive gene. Additionally, the range of symptom expression within the susceptible class provided evidence of other genes modifying the expression of resistance.

A new gene, developed through mutagenesis, for resistance of rice to bacterial leaf blight (Xanthomonas campestris pv. oryzae)

1990 ◽  
Vol 114 (2) ◽  
pp. 219-224 ◽  
Author(s):  
H. Nakai ◽  
K. Nakamura ◽  
S. Kuwahara ◽  
M. Saito
Keyword(s):  
Resistance Genes ◽  
Xanthomonas Campestris ◽  
Recessive Gene ◽  
Leaf Blight ◽  
Bacterial Leaf Blight ◽  
Thermal Neutrons ◽  
Single Recessive Gene ◽  
Recessive Genes ◽  
New Gene ◽  
Induced Mutant

SUMMARYAn induced mutant of rice, designated M41, resistant to several races of bacterial leaf blight, obtained after irradiation with thermal neutrons, was crossed with the original variety, Harebare. Test crosses revealed that the resistance of M41 to the Japanese races I, II, III and IV is controlled by a single recessive gene, considered to be different from four previously identified dominant resistance genes of japonica-type varieties and from three recessive genes in indica-type varieties for resistance to Philippine races. The gene in M41 was tentatively designated xa-nm(t).

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 Inheritance of Resistance to Xanthomonas campestris pv. vesicatoria Race T3 in Tomato

HortScience ◽  
1995 ◽  
Vol 30 (4) ◽  
pp. 822F-822
Author(s):  
J.W. Scott ◽  
J.B. Jones ◽  
G. Cameron Somodi ◽  
R.E. Stall
Keyword(s):  
Xanthomonas Campestris ◽  
Dominant Gene ◽  
Field Resistance ◽  
Inheritance Of Resistance ◽  
Growth Chambers

Resistant Hawaii 7981 (P1) was crossed with susceptible Fla. 7060 (P2), and F1, BCP1, BCP2, and F2 generations were obtained. Hypersensitive reactions (Hr) were measured 24 and 48 hours after inoculation in growth chambers at 24 and 30C. At 30C, there was no Hr. At 24C and 24 hours, 100% of Hawaii 7981 plants, 54.2% of BCP1 plants, and 21.7% of F2 plants had Hr. At 24C and 48 hours, 100% of Hawaii 7981, the F1, and BCP1 plants; 50% of BCP2 plants; and 73.3% of F2 plants had Hr. Other plants were inoculated and rated for race T3 in the field. Disease for each generation was significantly different (P < 0.05) and their order from most to least resistant was P1, BCP1, F1, F2, BCP2, and P2. The F1s were distributed between the parents with slight overlaps. BC plants had bimodal peaks similar to the F1 and their respective parents. The F2 had three peaks corresponding to P1, F1, and P2. The data suggest Hr and field resistance are controlled by the same incompletely dominant gene.

scholarly journals INHERITANCE OF ZINGIBERENE IN LYCOPERSICON

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1169b-1169
Author(s):  
Fazal R. Rahimi ◽  
Catherine Carter
Keyword(s):  
Colorado Potato Beetle ◽  
Dominant Gene ◽  
Recessive Gene ◽  
Single Dominant Gene ◽  
Single Recessive Gene ◽  
Potato Beetle ◽  
Backcross Populations

Zingiberene, a sesquiterpene, was detected in the foliage extract of L. hirsutum f. hirsutum Humb. and Bonp1. (hir), and confirmed by GC-MS. Zingiberene does not exist in L. hirsutum f. glabratum C. H. Mull (gla), which instead contains 2-tridecanone. 2-Tridecanone confers resistance to gla against Colorado Potato Beetle. The Presence of Zingiberene is associated with resistance against Colorado Potato Beetle in hir, which does not contain 2-tridecanone. The gene that conditions zingiberene acts differently in two different genetic backgrounds. In gla × hir this gene acts as a single recessive gene, while in L. esculentum × hir it acts as a single dominant gene. This situation, which has been studied in F2 and backcross populations of crosses in both directions are examined and discussed.

scholarly journals Inheritance of Resistance to the Watermelon Strain of Papaya Ringspot Virus in Watermelon

HortScience ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 811C-811
Author(s):  
Nihat Guner* ◽  
Zvezdana Pesic-VanEsbroeck ◽  
Todd Wehner
Keyword(s):  
New Hampshire ◽  
Citrullus Lanatus ◽  
Recessive Gene ◽  
Germplasm Collection ◽  
Ringspot Virus ◽  
Inheritance Of Resistance ◽  
Papaya Ringspot Virus ◽  
Single Recessive Gene ◽  
Susceptible Parent ◽  
Sources Of Resistance

Sources of resistance to the watermelon strain of papaya ringspot virus (PRSV-W) have been identified within the watermelon (Citrullus lanatus) germplasm collection. Inheritance of resistance to papaya ringspot virus-watermelon strain was studied in three C. lanatus var. citroides accessions: PI 244017, PI 244019, and PI 485583. The susceptible parent lines `Allsweet', `Calhoun Gray', and `New Hampshire Midget' were crossed with resistant accessions to develop F1, F2, and BC1 generations for six families. A single recessive gene was found to control resistance to PRSV-W. The gene symbol `prv' is proposed for PRSV-W resistance in watermelon. Additional work is needed to determine whether the genes in PI 244017, PI 244019, and PI 485583 are allelic for resistance to PRSV-W.

Inheritance of resistance to potato virus Y in tomato

1988 ◽  
Vol 39 (3) ◽  
pp. 475 ◽  
Author(s):  
JE Thomas ◽  
DJ McGrath
Keyword(s):  
Potato Virus ◽  
Genetic Background ◽  
Potato Virus Y ◽  
Recessive Gene ◽  
Inheritance Of Resistance ◽  
Lycopersicon Hirsutum ◽  
Single Recessive Gene ◽  
Tomato Cultivar ◽  
Segregation Data ◽  
Susceptible Tomato

A line of Lycopersicon hirsutum (P.I. 247087) was resistant to iystemic infection by 10 isolates of potato virus Y (PVY) from Queensland. The inheritance of resistance to PVY was studied in crosses between a susceptible tomato cultivar (L. esculentum cv. Floradade) and P.I. 247087. Analysis of segregation data from PVY-inoculated parent lines, F1, F2 and backcross generations, supported the hypothesis that resistance is conferred by a single recessive gene. However, the effect of this gene was, in some generations, apparently modified by the highly susceptible genetic background of Floradade tomato. A backcrossing programme has commenced to incorporate this resistance into a commercially acceptable tomato cultivar.

scholarly journals New Sources of Resistance to Black rot in Crucifers and Inheritance of Resistance.

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1122f-1122
Author(s):  
Z. H. Guo ◽  
M. H. Dickson ◽  
J. E. Hunter
Keyword(s):  
Chinese Cabbage ◽  
Dominant Gene ◽  
Recessive Gene ◽  
Brassica Species ◽  
Black Rot ◽  
Inheritance Of Resistance ◽  
Quantitative Inheritance ◽  
Sources Of Resistance ◽  
Moderate Resistance ◽  
High Level

Resistance to Black rot was studied in B. oleracea, B. campestris and B. napus, using three different inoculation procedures. The results indicated that hydathode inoculation without wounding and the wound suspension technique were useful for differentiating levels of resistance found in B. oleracea and B. campestris, but not in B. napus. Only the wound colony method allowed differentiation between high and moderate resistance in B napus. B. napus, PI 199947 and PI 199949, exhibited the highest resistance found in cultivated Brassica species. In B. campestris, two chinese cabbage accessions showed quantitative inheritance for moderate levels of resistance. In B. napus, the high level of reistance was conferred by one dominant gene, to which the symbol Br was assigned, whereas the moderate resistance was due to one recessive gene bm.

scholarly journals (11) Inheritance of Resistance to Zucchini Yellow Mosaic Virus-Florida Strain in Watermelon

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1039E-1039
Author(s):  
Nihat Guner ◽  
Todd C. Wehner
Keyword(s):  
Mosaic Virus ◽  
New Hampshire ◽  
Zucchini Yellow Mosaic Virus ◽  
Recessive Gene ◽  
Yellow Mosaic Virus ◽  
Inheritance Of Resistance ◽  
Single Recessive Gene ◽  
Leaf Stage ◽  
True Leaf ◽  
Severe Isolate

Inheritance of resistance to zucchini yellow mosaic virus-Florida strain (ZYMV-FL) was studied in the resistant watermelon accession of PI 595203 (Citrulluslanatus var. lanatus), an egusi type originally collected in Nigeria. The F1, F2, and BC1 generations derived from the cross `Calhoun Gray' × PI 595203 and `New Hampshire Midget' × PI 595203 were used to study the inheritance of resistance to ZYMV-FL. Seedlings were inoculated with a severe isolate of ZYMV-FL at the first true leaf stage and rated on a 0 to 9 scale, based on the severity of virus symptoms. A single recessive gene was found to control resistance, for which we propose the symbol zym-FL2. The gene probably was not allelic to the previously published gene, zym-FL, for resistance to the Florida strain of ZYMV in the accession PI 482261, since PI 482261 was not resistant to the ZYMV-FL isolate used in our tests.

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