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Hybridization program that used AUS-15854 as donor parent was
undertaken using high agronomic traits bearing varieties to involve
CCN resistant gene. The promising and popular seven wheat varieties
were developed through hybridization followed by pedigree method in
naturally infested field conditions. The cross selected combination
for this program is as shown in Table
1.
The selection of CCN resistant plants under CCN infested field
conditions was made in different subsequent generations (F2
- F5) in each cross. Promising and desirable CCN
resistant progenies were selected in each cross in F6
generations. The yield trial was carried out to evaluate yield
performance of evolved lines against most popular and widely
cultivated wheat variety Raj.3077. Out of 7 cross progenies only
three best yielders and CCN resistant genotypes (CCNRV1,
CCNRV3, CCNRV7) were selected for further
testing program in large CCN infested areas of the state.
After generating sufficient seeds of above said three genotypes,
trials were conducted at about five dozens of CCN infested
cultivators field (at 6-10 larvae/g soil). During experiment a CCN
susceptible but widely grown variety (Raj. 3077) was kept as compared
check. The result of trials (Table 2)
exhibited that all the three CCN resistant lines were recorded
significantly higher grain yield over the cheek variety Raj. 3077..
However, all the three lines were observed to be at par in grain
yield. Of these three lines, CCNRV1 possess better grain
quality and more straw yield than others (CCNRV3,
CCNRV7). Thus CCNRV1 line could be used for planting in
CCN infested areas as well as for better straw yield.
Execution of large scale field trials are also going on under mega
environments of the state to confirm higher yield potential along
with other desirable traits. The release of such types of varieties
shall certainly be revolutionized the wheat production in the CCN
infested areas of different states of India. This would also be
helpful to produce extra grain for rapidly growing population of the
country.
References
Mathur BN (1969) Studies on cereal root eel worm Heterodera
avenae with special reference to molya disease of wheat and
barley in Rajasthan. Ph.D. thesis, Univ Rajasthan, Jaipur. 233.
Mathur BN, Handa DK, Swaroop S, Sethi CL, Sharma GL and Yadav BD
(1980) On the loss estimation and chemical control of 'molya' disease
of wheat caused by Heterodera avenae in India. Ind. J.
Nematol. 16(2) :152-154.
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