Line×tester analysis in lilium×formolongi: identification of superior parents for growth and flowering traits

Abstract

An experiment was carried out using eight double cross F1s (DCF1s) as lines and two testers to obtain sixteen Line ×Tester hybrids for the evaluation of major growth and flowering traits thereby to understand the breeding potentiality of the parental lines. The performance of growth and flowering traits of all twenty-six genotypes were evaluated in a randomized complete block design (RCBD) with three replications. The analysis of variance (ANOVA) showed all the genotypes were significantly different for all agro-morphological traits under study. The estimated general combining ability (GCA) effects showed that parent 5(P5), were superior for plant height, stem diameter, number of leaves, leaf length, days to flowering and attitude of floral axis followed by parent 2(P2) for leaf length, leaf width, days to flowering and attitude of floral axis and parent7 (P7) for number of flower, flower diameter, bud length and attitude for floral axis. Likewise; tester 1 found to be best combiner with significant GCA effect for almost all growth and flowering traits (except number of leaves). The plant height, leaf width, number of flower and attitude of floral axis showed prevailing additive gene action while stem diameter, number of leaves, leaf length, days to flowering, flower diameter and bud length indicated predominance of dominance gene action. We can conclude that parent P5, parent P2 and parent P7 can be used as good mother lines and the tester 1, as good donor for the seed production.
 SAARC J. Agri., 17(1): 175-187 (2019)

IDENTIFICATION OF SUPERIOR THREE WAY-CROSS F1S, ITS LINE×TESTER HYBRIDS AND DONORS FOR MAJOR QUANTITATIVE TRAITS IN Lilium×formolongi

“…In this study, the mean performance of Lines (three way-cross F1s), Testers (donor CVs/breeding lines) and their L×T hybrids demonstrated significant differences for the studied quantitative traits (Rai et al, 2018;Rai et al, 2019). Montazeri et al (2014) in Rice and Kumari et al (2015) in Pea had also been found significant variation among the studied traits of lines, testers and L×T hybrids.…”

“…Though SCA effects reflect that L×T hybrids ( L4×T3), ( L5×T1), ( L2×T1), ( L2×T2), ( L3×T2) and (L3×T3) can be used for the further selection process. The previous results of Narasimhamurthy & Gowda, (2013) in Tomato, Kumari et al (2015) in Pea, Rai et al (2018) and Rai et al (2019) in Lilium× formolongi has been so far reported that the high specific combiner is the outcomes of the all three types of combination of general combiner parents viz. high×high, low×low and high ×low that means not always comes only from the high×high general combiner parents.…”

“…In contrast with the findings of Song et al, 2004;Rai et al, 2018 andRai et al,2019 plant height, stem diameter, the number of leaves, leaf length, the number of flowers, days to flowering and flower diameter represented prevalence of non-additive gene action thereby indicated the importance of heterosis breeding followed by selection for these quantitative traits. The contrast gene action Rai et al (2018) and Rai et al (2019) have used Single cross F1s and Double-cross F1s as mother lines in their lines×tester analysis.…”

“…The field experiment has been carried out in RCBD plot design with maintaining 3 replications. The land preparation, fertilizers and insecticides application, as well as other intercultural operations, has been carried out following the Rai et al (2019).…”