STUDIES ON IMPORTANT HORTICULTURAL TRAITS AND RESISTANCE TO FUSARIUM WILT IN GARDEN PEA (Pisum sativum L)
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Date
2018-05
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UHF,NAUNI
Abstract
ABSTRACT
The present investigation entitled “Studies on important horticultural traits and resistance to
Fusarium wilt in garden pea (Pisum sativum L)” was carried out at the Research Farm, Department of
Vegetable Science, Dr YS Parmar University of Horticulture and Forestry, Nauni, Solan (HP) and
Vegetable Research Station, Kalpa, District Kinnaur during 2015-16 and 2016-17. Six diverse
genotypes of garden pea viz., Arkel, Matar Ageta-6, VRP-6, PM-2, VL-7 and IC-199303 (resistant to
Fusarium wilt) were crossed in a half diallel design excluding reciprocals to produce 15 F1’s. Each F1
was selfed to produce F2 generation. For studying inheritance of Fusarium wilt, backcrosses of two
crosses viz., Arkel × IC-199303 and Matar Ageta-6 × IC-199303 were also produced. All parents,
F1’s, F2’s, B1’s and B2’s were evaluated during autumn-winter season, 2016 in randomized complete
block design with three replications. The observations were recorded on node at which the first flower
appeared, days to 50 per cent flowering, days to marketable maturity, plant height (cm), number of
pods per plant, pod length (cm), pod width (cm), number of seeds per pod, shelling percentage (%),
pod yield per plant (g) and per hectare (q), total soluble solids (°B) and total phenols (mg/100g). The
inheritance of Fusarium wilt disease was also studied by observing segregation pattern of different
generations (F2, B1 and B2) using chi-square analysis. On the basis of overall performance of the
parents and crosses for mean value, heterosis and other genetic parameters parents VRP-6 and Arkel
and crosses Arkel × VRP-6, Matar Ageta-6 × VRP-6 and Arkel × PM-2 performed well for majority
of yield and yield contributing traits. These crosses may be helpful in isolating transgressive
segregants for further improvement in garden pea. Chi-square analysis further determined the ratio of
resistance and susceptibility in F1 and backcrosses to resistant parent 1 (resistant) : 0 (susceptible),
while the F2 segregated in the ratio of 3 (resistant) : 1 (susceptible) and backcrosses to susceptible
parent in 1 (resistant) : 1 (susceptible) ratio approximately in both the crosses, confirmed that
resistance to Fusarium wilt in pea is governed by single dominant gene.
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