Question:
Nematode-resistant germplasm PNR-7 is of:
Nematode-resistant germplasm PNR-7 is of:
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Nematode-resistant varieties often carry the Mi gene, providing resistance against multiple Meloidogyne species.
Updated On: Jul 2, 2026
- Tomato
- Guava
- Citrus
- Barley
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The Correct Option is A
Approach Solution - 1
PNR
7:
Tomato (Lycopersicon esculentum) germplasm
Resistant to root
knot nematodes (Meloidogyne spp.)
Developed through conventional breeding
Other crops have different resistant varieties:
Guava: PNR
2
Citrus: Troyer citrange
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Approach Solution -2
Elimination approach:
PNR-7 follows the naming convention used for nematode-resistant tomato germplasm lines released for root-knot nematode (Meloidogyne spp.) resistance. Guava's resistant material is designated separately as PNR-2, so option (B) can be ruled out by name mismatch. Citrus rootstocks bred for nematode tolerance are known by different names such as Troyer citrange, not the PNR series, ruling out (C). Barley breeding for nematode resistance also does not use the PNR nomenclature, ruling out (D).
By elimination, PNR-7 must belong to Tomato.
PNR-7 follows the naming convention used for nematode-resistant tomato germplasm lines released for root-knot nematode (Meloidogyne spp.) resistance. Guava's resistant material is designated separately as PNR-2, so option (B) can be ruled out by name mismatch. Citrus rootstocks bred for nematode tolerance are known by different names such as Troyer citrange, not the PNR series, ruling out (C). Barley breeding for nematode resistance also does not use the PNR nomenclature, ruling out (D).
By elimination, PNR-7 must belong to Tomato.
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