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|Authors:||OULKAR, Mr. HANAMANT GOVIND|
|Title:||DEVELOPMENT OF TOMATO HYBRID RESISTANT TO NEMATODE AND FUSARIUM WILT|
|Publisher:||MAHATMA PHULE KRISHI VIDYAPEETH, RAHURI-413 722. DIST. AHMEDNAGAR, M.S., INDIA|
|Abstract:||The present investigation entitled, " Development of tomato hybrid resistant to nematode and fusarium wilt" was undertaken with the objectives of elucidating information on extent of heterosis, general and specific combining ability effects and inheritance of disease resistance to fusarium wilt and nematode. The crosses involving 3 lines and 7 testers were studied for 14 characters in Line x Tester mating design. -The mean performance of hybrids was superior than mean performance of the parents for yield and yield contributing characters like yield per plant and number of fruits per plant. Considerable amount of genetic variability among the parents and appreciable amount of heterosis over better parent and mid parent were observed for yield per plant and number of fruits per plant. The crosses M-l-2 x COMLCR-3, 32-2 x COMLCR-9, 85-1 x NF-37 showed higher se performance, high heterosis for yield and yield ontributing characters. The crosses 32-2 x COMLCR-3, M-l-2 x FEB-4 exhibited low incidence of fusarium wilt. For distant market, the crosses 85-1 x COMLCR-3, 32-2 x COMLCR-3 and M-l-2 x NF-37 were found to be stout with good pericarp thickness. Studies on combining ability indicated that none of the parents was observed as good general combiner for all the characters. The parent COMLCR-3, FEB-2, NF-37 were best general combiners for yield per plant and its components. Specific combining ability studies indicated that M-l-2 x COMLCR-3, 32-2 x FEB-2, 32-2 x COMLCR-9 and 85-1 x FEB-4 were the best specific combiners for yield per plant, fruit shape index, titrable acidity and number of locules, respectively. These crosses deserve due consideration for their further exploitation as commercial hybrids. None of the characters exhibited ratio of additive variance to dominance variance more than unity showing predominance of dominance gene action governing these characters. Except the characters radial diameter, fruit shape index, number of branches and TSS content showing predominance of additive gene action governing these characters. Considering the weight of fruits per plant and number of fruits per plant it would be suggested that parents M-l-2, COMLCR-3, FEB-2 and NF-37 were found to be good general combiner and had high heterotic response which could be exploited in future hybrid velopment programme. Furthermore, the cross combinations, M-l-2 x COMLCR-3, 85-1 x NF-37, 32-2 x COMLCR-3 and M-l-2 x FEB-4 deserve due consideration for their further exploitation as commercial hybrids as they produces better yield per plant, showed significant sea effects and were found to show low incidence of fosarium wilt.|
|Appears in Collections:||Thesis|
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