OAR@ICRISATTolerance to reniform nematode (Rotylehchulus reniformis) race A in pigeonpea (Cajanus cajan) genotypesS BSharmaauthorK CJainauthorSLingarajuauthorThe reniform nematode {Rotylenchulus reniformis) is an important pathogen of pigeonpea {Cqjanus cajan). Forty-six medium maturity (mature in 151 -200 days at Patancheru, India) pigeonpea genotypes were evaluated for resistance and tolerance to the reniform nematode in greenhouse and field tests, over the period 1990-97. Each genotype was screened for 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 carboftiran-treated plots was compared with that in non-treated plots in a field naturally infested with R. reniformis. Pigeonpea genotypes C11,ICPL 87119 and ICPL 270 were used as nematode susceptible checks. Genotypes with good plant growth, both in nematode-free and nematode-infested plots, were identified as tolerant and evaluated for plant growth and yield for at least three years. AH the tested genotypes were susceptible (7 and 9 egg mass .score). 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-sick field for at least three years. The most promising nematode tolerant genotypes produced significantly greater yield and biomass than the locally grown pigeonpea cultivars in fields naturally infested with R. reniformis at two locations. Pigeonpea landraces are considered to be the most likely sources of tolerance to the nematode. These reniform nematode tolerant lines represent new germplasm and they are available in the genehank of pigeonpea at ICR1SAT bearing accession numbers ICP 16329, ICP 16330, ICP 16331, ICP 16332, and ICP 16333.Pigeonpea2000Association of Applied BiologistsArticle

For work being deposited by its own author: In self-archiving this collection of files and associated bibliographic metadata, I grant OAR@ICRISAT the right to store them and to make them permanently available publicly for free on-line. I declare that this material is my own intellectual property and I understand that OAR@ICRISAT does not assume any responsibility if there is any breach of copyright in distributing these files or metadata. (All authors are urged to prominently assert their copyright on the title page of their work.)

For work being deposited by someone other than its author: I hereby declare that the collection of files and associated bibliographic metadata that I am archiving at OAR@ICRISAT) is in the public domain. If this is not the case, I accept full responsibility for any breach of copyright that distributing these files or metadata may entail.

Clicking on the deposit button indicates your agreement to these terms.