LINE X TESTER ANALYSIS FOR YIELD AND IT’S CONTRIBUTING TRAITS IN WHEAT UNDER HEAT STRESS CONDITION (Triticum aestivum L.)
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Date
2019-08-22
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Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola, Maharashtra.
Abstract
The present study entitled “Line x Tester analysis for yield and it’s contributing traits in wheat under heat stress condition (Triticum aestivum L.)’’ was carried out with objectives to study the heterosis and combining ability effects in different genotypes of wheat using Line x Tester analysis.
The crosses were made using six lines (females) viz. NIAW-34, AKW-1071, PDKV-Sardar, AKAW-4627, AKAW-4927, AKAW-5023 and eight testers (males) viz., AKW-2862-1, C-306, DHTW-60, WH-730, HTW-6, HINDI-62, AKAW-3717, HTW-11 and their 48 crosses along with the PDKV-Sardar as standard check have been evaluated in randomized block design with three replications at Wheat Research Unit, Dr. PDKV, Akola during rabi season of 2018-19. The resultant hybrids and parents were evaluated for days to heading, days to maturity, plant height (cm) at maturity, number of tillers per plant at maturity, spike length, grains per spike, grain weight per spike, 1000 grain weight, grain yield per plant, protein percent (%), β-carotene content (ppm).
The highest significant sca effect for grain yield was recorded by the cross AKAW-5023 x WH-7304 followed by AKAW-4627 x C-306, AKAW-4627 x DHTW-60, AKW-1071 x AKW-2862-1, NIAW-34 x AKAW-3717. The crosses AKW-1071 x HTW-11 and PDKV-Sardar x HINDI-62 recorded highly significant sca effects for protein percent and β-carotene content respectively. These crosses also recorded the sca effects for most of the yield contributing traits.
From the present study, it is concluded that genotype AKAW-4627 x C-306, AKAW-4627 x DHTW-60 and AKAW-4927 x DHTW-60 are identified as best combiners for yield and yield contributing traits. Among the parents two lines (AKAW-4627 and AKAW-4927) and two testers (C-306 and DHTW-60) were found to be good general combiners for yield per plant along with the most of the yield contributing traits. Thus, these parents should be included in further hybridization programme.
On the basis of mean yield performance, standard heterosis, gca and sca effects three crosses were identified as promising crosses which are viz., AKAW-4627 x C-306, AKAW-4627 x DHTW-60, AKAW-4927 x DHTW-60 and AKAW-4627 x WH-730 should be exploited for getting useful segregants in further generation for development of genotypes suitable for heat tolerance condition.
The genotypes C-306 was identified as best combiner followed by AKW-1071, WH-730, AKAW-4927 and AKW-2862-1 days to heading, plant height, number of tillers per plant, number of seeds per spike, grain weight per spike,1000 seed weight and grain yield per plant hence, should be used as one of the parents for crossing with above suggested genotypes for getting better recombinants in further segregating generations for development of genotypes with high yield and suitable under the heat stress condition.
Description
48 hybrids were developed by crossing six female lines with eight diverse testers in line x tester mating design.
The resultant hybrids and parents were evaluated for days to heading, days to maturity, plant height (cm) at maturity, number of tillers per plant at maturity, spike length, grains per spike, grain weight per spike, 1000 grain weight, grain yield per plant, protein percent (%), β-carotene content (ppm).
Promising hybrids were chosen on the basis of mean performance, heterosis and specific combining ability effects of the crosses. Promising parents were also selected on the basis of general combining ability effects of the parents for yield and yield contributing characters.
Keywords
Crop Improvement, Genotypes, Replication, Gene Interaction, Breeding Methods, Pure Lines, Inbred Lines, Genetics, Genetic variation, Breeding, Parents, Pollinations, Cross pollination, Hybridization, Hybrids, F1 hybrids, Heterosis, Combining ability, Crops, Field crops, Statistics And Experimentation, Field Experiment, Experimental Design, Lines, Testers, Checks, Randomized Block Design, Average Heterosis, Heterobeltiosis, Standard Heterosis, General Combining Ability, Specific Combining Ability,
Citation
BHALERAO, HARIDAS JALINDAR. (2019). Line X tester analysis for yield and it’s contributing traits in wheat under heat stress condition (triticum aestivum l.). Department of Agricultural Botany. Dr. Panjabrao Deshmukh Krishi Vidyapeeth, Akola. M. Sc. (2019). Print. xi, 105p. (Unpublished).