Heterosis and combining ability studies in brinjal
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Date
2018
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CCSHAU
Abstract
The current investigation entitled “Heterosis and combining ability studies in brinjal’’ was undertaken to reproduce the information on the extent of heterosis, and to enlighten the combining ability effects of parents and hybrids using line x tester mating design. The experiment was carried out at Research Farm of the Department of Vegetable Science, Chaudhary Charan Singh Haryana Agricultural University, Hisar during spring-summer and rainy season of 2017. 15 lines and 3 testers were crossed in a line x tester mating design to generate 45 F1 hybrids and were evaluated against standard hybrid (Punjab Sadabahar). The observations were recorded on 13 different characters in brinjal.
The analysis of variance revealed that the genotype selected for the current investigations were having sufficient amount of genetic variability among the genotypes to carry out further genetic analysis. The analysis of variance for combining ability showing that the variances due to GCA and SCA were highly significant for all the characters indicating the importance of both additive and non-additive gene action in the inheritance of these traits. Among all the fifteen lines, the line HE -100 was found good general combiner for characters like plant height, number of branches per plant, days to 50% flowering, days to first fruit harvest, number of flowers per cluster, number of fruits per cluster, fruit length (cm), fruit length to fruit diameter ratio, fruit yield per plant (kg) and fruit yield per hectare (q). Similarly, among testers, BR-112 was best general combiner for plant height, days to first fruit harvest, fruit diameter, average fruit weight (g), fruit yield per plant (kg) and fruit yield per hectare (q), HLB-12 found good combiner for number of braches per plant, number of flowers per cluster, number of fruits per cluster, fruit length (cm), fruit length to fruit diameter ratio and number of fruits per plant, and H-8 tester found good combiner for only days to 50% flowering. On the basis of SCA effects, the top performing crosses were HE-104 x H-8 (50.09) and HE-105 x BR-112 (45.04) for fruit yield per plant (kg) and fruit yield per hectare (q). Highest heterotic value for fruit yield per plant were observed in cross combinations HE-100 x H-8 (42.27%) followed by HE-100 x HLB-12 (40.97%), HE-106 x BR-112 (37.54%) and HE-101 x BR-112 (36.46%). Highest per se performance was recorded in the line HE-100 (440.46 q), tester HLB-12 (464.75 q) and cross combinations HE-100 x H-8 (505.51 q), HE-100 x HLB-12 (500.90 q) and HE-106 x BR-112 (488.70 q) yielded highest fruit yield per hectare in brinjal.
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