Preliminary field screening of newly developed bitter gourd breeding lines against cucurbit powdery mildew and for key fruit traits

2019 ◽  
pp. 47-50
Author(s):  
S. Laenoi ◽  
S. Srimat ◽  
N.P.S. Dhillon
Keyword(s):  
Powdery Mildew ◽  
Bitter Gourd ◽  
Fruit Traits ◽  
Field Screening ◽  
Breeding Lines ◽  
Cucurbit Powdery Mildew

scholarly journals Inheritance of Resistance to Cucurbit Powdery Mildew in Bitter Gourd

HortScience ◽  
2019 ◽  
Vol 54 (6) ◽  
pp. 1013-1016 ◽  
Author(s):  
Narinder P.S. Dhillon ◽  
Supannika Sanguansil ◽  
Supornpun Srimat ◽  
Suwannee Laenoi ◽  
Roland Schafleitner ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Bitter Gourd ◽  
Inheritance Of Resistance ◽  
Breeding Lines ◽  
Resistant Lines ◽  
Recessive Genes ◽  
High Level ◽  
Important Disease ◽  
Level Resistance ◽  
Cucurbit Powdery Mildew

Cucurbit powdery mildew (CPM) caused by Podosphaera xanthii (Px) is an economically important disease of bitter gourd (BG; Momordica charantia) in Asia. High-level resistance to CPM is known in various BG accessions that have been used to develop BG breeding lines that originated in different countries. BG breeding lines THMC 113 (Belize), THMC 143 (India), THMC 153 (Thailand), THMC 167 (India), and THMC 170 (Taiwan) possess high-level resistance to BG Px race (BG-CPM), designated Mc-1 from a field at Kamphaeng Saen, Thailand, whereas THMC 144 (India) is susceptible. Our objective was to determine the inheritance of resistance to BG-CPM race Mc-1. To that end, THMC 144 (India) was crossed with the five resistant lines. The parents and their respective F1, F2, backcross progenies were evaluated for BG-CPM disease severity in inoculated field and growth chamber tests. Resistance to BG-CPM race Mc-1 in the five resistant lines was controlled by at least two independent, recessive genes. Intercrosses of the BG-CPM–resistant lines revealed allelic resistances in four of the breeding lines: THMC 113, THMC 153, THMC 167, and THMC 170. Resistance in THMC 143 was clearly non-allelic for resistance to BG-CPM with the other four BG-CPM–resistant lines.

scholarly journals Cucurbit Powdery Mildew-resistant Bitter Gourd Breeding Lines Reveal Four Races of Podosphaera xanthii in Asia

HortScience ◽  
2018 ◽  
Vol 53 (3) ◽  
pp. 337-341 ◽  
Author(s):  
Narinder P.S. Dhillon ◽  
Supannika Sanguansil ◽  
Supornpun Srimat ◽  
Roland Schafleitner ◽  
B. Manjunath ◽  
...  
Keyword(s):  
Powdery Mildew ◽  
Smallholder Farmers ◽  
Bitter Gourd ◽  
Yield Potential ◽  
Podosphaera Xanthii ◽  
Asian Countries ◽  
Sources Of Resistance ◽  
Breeding Lines ◽  
Race 1 ◽  
Cucurbit Powdery Mildew

Bitter gourd (Momordica charantia L.) is a commercially and nutritionally important market vegetable in Asia cultivated mainly by smallholder farmers. Cucurbit powdery mildew (CPM) caused by Podosphaera xanthii (Px) is a nearly ubiquitous and serious fungal disease of bitter gourd. Five bitter gourd breeding lines (THMC 113, THMC 143, THMC 153, THMC 167, and THMC 170) were selected at the World Vegetable Center for resistance to a local isolate of Px in Kamphaeng Saen, Thailand. We evaluated the resistance potential of these five inbred lines against local isolates of Px at 12 locations in five Asian countries. Plants were inoculated with the respective local Px isolate 15 and 30 days after transplanting and additional Px-infected plants of the inoculated control were interplanted throughout each test. Plants were rated 60 days after transplanting for CPM reaction using a 0 (no evidence of infection) to 5 (>75% infection evident on individual leaves) disease severity scale. THMC 153 and THMC 167 were resistant to the local race of Px in all locations, whereas THMC 143 was observed resistant in all test locations except one in China. THMC 113 was resistant in each location except one in India. THMC 170 was susceptible in three locations in India. The multilocation tests revealed four unique Px races on bitter gourd in different Asian countries and sources of resistance for breeding CPM-resistant bitter gourd cultivars. Six strains of Px isolated from other cucurbits (Cucumis and Cucurbita) and representing five melon CPM races were unable to infect the susceptible M. charantia accession THMC 144 and the five resistant breeding lines, indicating pathotype differences between them and an isolate of M. charantia origin typed as race 1 on melon. THMC 143 and THMC 167, which originated from India, exhibited good yield potential in trials conducted in Thailand, Myanmar, Vietnam, and Bangladesh.

Screening of bitter gourd germplasm and advanced breeding lines against powdery mildew

2018 ◽  
Vol 72 (1) ◽  
pp. 15-22
Author(s):  
K. Prasanth ◽  
B. Varalakshmi ◽  
R. Venugopalan ◽  
S. Sriram
Keyword(s):  
Powdery Mildew ◽  
Bitter Gourd ◽  
Breeding Lines

scholarly journals Transformation of the cucurbit powdery mildew pathogen Podosphaera xanthii by Agrobacterium tumefaciens

2016 ◽  
Vol 213 (4) ◽  
pp. 1961-1973 ◽  
Author(s):  
Jesús Martínez‐Cruz ◽  
Diego Romero ◽  
Antonio Vicente ◽  
Alejandro Pérez‐García
Keyword(s):  
Agrobacterium Tumefaciens ◽  
Powdery Mildew ◽  
Podosphaera Xanthii ◽  
Powdery Mildew Pathogen ◽  
Cucurbit Powdery Mildew

scholarly journals Response of Pisum sativum germplasm resistant to Erysiphe pisi to inoculation with Erysiphe baeumleri, a new pathogen of pea

2010 ◽  
Vol 41 (No. 3) ◽  
pp. 95-103 ◽  
Author(s):  
M. Ondřej ◽  
R. Dostálová ◽  
L. Odstrčilová
Keyword(s):  
Powdery Mildew ◽  
Pisum Sativum ◽  
Natural Infection ◽  
Erysiphe Pisi ◽  
Field Screening ◽  
Susceptible Control ◽  
High Level ◽  
Screening Trials

Cultivars, homozygous sources and lines of pea (<I>Pisum sativum</I> L.) resistant to <I>Erysiphe pisi</I> had recently been attacked by another powdery mildew species, <I>Erysiphe</I> <I>baeumleri,</I> in the field and in glasshouse conditions. Inoculation with <I>E. baeumleri</I> was carried out in the glasshouse to evaluate the level of resistance of 16 pea genotypes. Susceptible pea lines produced abundant conidia and cleistocarps on petioles and leaves. Only the genotype Tudor (Cebeco 4119) was found to be completely resistant to <I>E. baeumleri</I>. Nineteen pea genotypes (with gene <I>er-1</I>) were tested to natural infection by <I>E. baeumleri</I> in field screening trials. Only few of them demonstrated a high level of resistance (Fallon, AC Melfort and Joel). Consort R, SGL 2024, SGL 1977 and Franklin were very susceptible to <I>E. baeumleri</I>. Cleistocarps with 1–4× dichotomously branching apices of appendages were formed only on susceptible and very susceptible plants of genotypes SGL 444/2185, Consort R, SGL 2024, SGL 1977, LU 390-R2, Lifter, Highlight, Cebeco 1171 and Carneval R in the field and glasshouse. Susceptible control genotypes without gene <I>er-1</I> (Komet, Adept and Gotik) were attacked in the trials by <I>E.&nbsp;pisi</I> only.

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