Heterosis and combining ability analysis for yield and yield contributing traits in velvet bean Mucuna pruriens (L.) DC

Abstract

A field experiment was conducted to know the gene action and selection of superior parents of velvet bean for hybridization. The heterosis and combining ability study was carried out using 6x6 half diallel mating design excluding reciprocals. Combining ability analysis revealed that magnitude of sca variance was greater than gca variance suggesting the predominance of non additive gene action for most of the traits except days to 50 per cent flowering, number of flowers per inflorescence, number of pods per bunch and 100 seed weight where gca variance was greater than sca variance indicating predominance of additive gene action. Based on gca effects, parents Arka Dhanwantari, IIHR Selection 8 and IIHR Selection 2 were best general combiners for the traits such as number of flowers per inflorescence, pod length, pod weight, number of bunches per plant, number of pods per bunch, dry pod yield and seed yield per plant which can be used in future breeding programme. Specific combining ability studies indicated cross IIHR Selection 2 x IIHR Selection 8 as best specific combiner for the economically important traits viz., pod length, pod weight, dry pod yield per plant and seed yield per plant. The cross IIHR Selection 8 x IIHR Selection 3 was recorded high heterotic effects for dry pod yield per plant, seed yield per plant and test weight of the seed. The cross IIHR Selection 2 x IIHR Selection 8 as superior hybrid as recorded high heterobeltiosis for days to 50% flowering, pod length, pod weight, dry pod yield per plant and seed yield per plant and days to maturity which can be exploited in future breeding programme.

Studies on Heterosis for Pod Yield and Protein Content in Yardlong Bean (Vigna unguiculata (L.) Walp. ssp. Sesquipedalis Verdc.)

“…Eight hybrids were significantly superior by exhibiting significant positive heterosis over check Arka Mangala. Similar findings were reported by Chinapolaiah et al [9] in velvet bean and Khaimichho et al [10] in mung bean. For pod weight, twenty hybrids exhibited significant positive relative heterosis and twelve hybrids exhibited significant and positive heterosis over better parent.…”

Assessment of Transgressive Segregants for Yield and its Component Traits in French Bean (Phaseolus vulgaris L.)

“…The results on heterobeltiosis corroborated with findings Chinapolaiah et al (2019) who revealed high heterotic effect on plant traits such as days to 50% flowering, pod length, pod weight, dry pod yield per plant and seed yield per plant in velvet bean. Patil et al (2012) revealed high heterosis in crosses of vegetable lab lab bean for number of pods and green pod yield per plant.…”

Association mapping of important agronomic traits in Mucuna pruriens (L.) DC.

“…The estimation method used(Daxenbichler et al1972) by us in this study is old and laborious; thus, it is plausible that poor recovery and associated short comings might have skewed this experiment. Moderately-high to high heritability (H 2 > 60%) were observed for different traits in our study.Two earlier studies found analogous observation in M. pruriens for traits such as pod length, pod width, pod weight, hundred seed weight, seed yield per plant, and in orescence length(Hadapad et al 2018;Chinapolaiah et al 2019). Our results reinforce them.…”