Tolerance to reniform nematode (Rotylenchulus reniformis) race A in pigeonpea (Cajanus cajan) genotypes

Sharma, S.B. and Jain, K.C. and Lingaraju, S. (2000) Tolerance to reniform nematode (Rotylenchulus reniformis) race A in pigeonpea (Cajanus cajan) genotypes. Annals of Applied Biology, 136 (3). pp. 247-252.

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Forty-six medium maturity (mature in 151 to 200 days) pigeon pea genotypes were evaluated for resistance and tolerance to the reniform nematode in greenhouse and field tests in Andhra Pradesh, India, during 1990-97. Each genotype was screened for the number of nematode egg masses on a 1 (no egg mass = highly resistant) to 9 (>50 egg masses = highly susceptible) scale. Plant biomass production in carbofuran-treated plots was compared with that in non-treated plots in a field naturally infested with R. reniformis. Pigeon pea genotypes C 11, ICPL 87119 and ICPL 270 were used as nematode susceptible controls. All the tested genotypes were susceptible in terms of egg mass scores (7 and 9 egg mass scores). However, of these, some genotypes with good plant growth, both in nematode-free and -infested plots, were designated as tolerant and evaluated for plant growth and yield for at least 3 years. Single-plant-selections, based on plant vigour and yield, were made from genotypes showing tolerance to nematode infection. The level of tolerance was enhanced by plant-to-progeny row selection for plant vigour and seed yield in a nematode-infested field for at least 3 years. The most promising nematode tolerant genotypes produced significantly greater yield and biomass than the locally grown pigeon pea cultivars in fields naturally infested with R. reniformis at 2 locations. These reniform nematode-tolerant lines represent new germplasm and they are available in the genebank of pigeon pea at ICRISAT bearing accession numbers ICP 16329, ICP 16330, ICP 16331, ICP 16332 and ICP 16333

Item Type: Article
Author Affiliation: International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru 502324, Andhra Pradesh, India
Subjects: Crop Improvement
Crop Improvement > Genetics/Genomics
Divisions: Pigeonpea
Depositing User: Mr B Krishnamurthy
Date Deposited: 11 Jan 2011 22:17
Last Modified: 11 Jan 2011 22:17
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