Heterosis Studies for Growth and Yield Traits in Cucumber (Cucumis sativus L.)

Abstract

An Indian origin cucumber (Cucumis sativus L.) is one of the most popular vegetables of the family Cucurbitaceae. It is the preferred in various ways, salad ingredient, pickles, deserts fruit and as a cooked vegetable, hence it has attained the crop improvement as compared to other cucurbit vegetables. Therefore the present investigation has been carried out to know the extent of heterosis for growth and yield parameters. The experimental materials consisted of 5 Lines and 5 Testers of cucumber collected from the germplasm maintained by the Department of Vegetable Science, College of Horticulture, UHS Campus, GKVK, and Bengaluru. Their 25 F 1 's were developed by crossing them in Line X Tester mating design. The IIHR-285, IIHR-341, IIHR-304, Green Long, Pondicherry-1, were used as lines and the Poinsette, Phule Shubhangi, Punjab Naveen, Pusa Uday, Kerala-1 were used as testers based on their yield potentiality. Observation from five competitive plants was recorded on various characters viz., vine length (cm), number of branches per vine, number of nodes per vine, Node of female flower appearance, node of male flower appearance, days to first fruit harvest, sex ratio, days to female flower anthesis and on fruit yield per plant (kg). Analysis of variance was carried out separately for all the characters. The present experiment identified the important hybrids for commercial use viz Green long × Poinsette, Green long × Pusa Uday, Pondicherry 1 × Punjab Naveen as which have exhibited the maximum significant standard heterosis for fruit yield per vine , for fruit length, average fruit weight, number of fruits per vine over the check Chitra.

Heterotic affinity and genetic control of monoecious cucumber (Cucumis sativus L.) inbred line for economic traits and tolerance to downy mildew disease

“…Two promising crosses, BCCU-16× BCCU-4 and BCCU-3 × BCCU-16 which showed the maximum significant heterobeltiosis for fruit yield/plant also exhibited significant heterosis in desired direction over better-parent for PDI of downy mildew, number of fruits/plant and other desired characters. Cucumber hybrid with higher fruit yield along with good horticultural traits was earlier reported by many workers (Kaur and Dhall, 2017;Singh and Tiwari, 2018;Das et al, 2019b;Preethi et al, 2019;Ene et al, 2019;Thakur et al, 2019). As the per se performance is the realized value and the heterotic response is an estimate, the former should also be given preference when making a selection in cross combinations (Katiyar, 1979).…”

Egyptian Cucumber Germplasm Genetic Diversity as An Approach for Developing Novel Hybrids under Heat Stress Conditions

“…Considerable heterosis was discovered over higher parent for numerous economic traits. The many negative heteroses for timing were recorded as days to 1 st female flower growing (Preethi et al, 2019). Vital heterosis had conjointly been reported for timing characters (Jat et al, 2021).…”

A 7×7 diallel cross for developing high-yielding and saline-tolerant barley (Hordeum vulgare L.)

“…Since barley is a self-pollinated crop with limited yield potential due to low heterosis, its breeding techniques also critical [ 1 ]. In the current study, we estimated the range of heterobeltiosis in F 1 hybrids ( Table 8 ) to select better F 1 s. Preethi et al [ 64 ] noted that for days to flowering and for days to first harvest, negative heterosis is ideal. This aligns with the primary objective of any breeding program: to help growers to capture the early market maximize economic benefits.…”