Gynoecious inbred with better combining ability improves yield and earliness in bitter gourd (Momordica charantia L.)

Abstract

This study was the only report for exploiting gynoecy for studying combining ability and hybrid development in bitter gourd. Thirty-six F 1 hybrids and nine inbred lines including one gynoecious line were used to assess combining ability for earliness and yield in bitter gourd Momordica charantia L.). Among parents, gynoecious parent; DBGy-201 showed maximum GCA effect in desirable direction for node to first female flower, days to first picking, numbers of fruits and yield per plant. The parent, P 6 (Priya) exhibited highest GCA effect for fruit length, weight and diameter. These parents were good general combiners for yield and earliness and could be used to improve these traits in bitter gourd breeding programmes for the accumulation of favourable genes. The parent P 1 (DBGy-201) also exhibited earliest in per se performance with first female flower at *7th node and the gynoecious hybrids DBGy-201 9 Pusa Vishesh and DBGy-201 9 Pusa Do Mausami had female flower at lower node (*8th node). The best gynoecious hybrids were DBGy-201 9 Priya for numbers of fruits per plant and DBGy-201 9 NDBT-12 for fruit yield per plant.The findings of second experiment (i.e. Line 9 Tester mating design) confirmed the potentiality of gynoeciuos 9 monoeciuos hybrids for high yield and earliness. The gynoecious inbred, DBGy-201 showed maximum GCA effect in desirable direction for node to first female flower, days to first picking, numbers of fruits and yield per plant and additive gene action is more important for breeding by selection.

Evaluation of Pumpkin (Cucurbita moschata L.) Genotypes for Earliness, Yield and Quality

“…Evaluation of parents with mean performance revealed that the genotype Kasi Harit (14.82) followed by Vadhalagundu local (17.36) were preferred as they would serve as good donors for developing hybrids with desirable sex ratio. Dey et al (2007) reported the similar result of narrow sex ratio in bitter gourd. Observation on days to first harvest is yet another indicator of the earliness in any crop especially vegetables hybrids which could fetch premium price and catch the early market.…”

Exploiting Gynoecious Line for Earliness and Yield Traits in Bitter Gourd (Momoredica charantia L.)

“…However, the utilisation of gynoecy is economical and easier for exploiting hybrid vigour in many cucurbits including bitter gourd (Behera, 2004) that have high male: female sex ratio. Using gynoecious line as one parent in hybrid breeding, it showed positive impact in terms of yield and earliness (Dey et al, 2010;Gangadhara Rao et al, 2018). Keeping in view the above facts, the present investigation was carried out to examine the extent of heterosis in 28 F 1 hybrids by using eight diverse parents.…”

Exploiting combining ability in a diallel cross between native and elite cucumber (Cucumis sativus L.) varieties

“…Improving fruit yield requires adequate information regarding the nature of GCA and SCA available in a wide array of genetic materials to be used in hybridization programmes. Several authors have used different genetic analyses to study combining ability in cucumber for fruit yield and yield components (Lopez-Sese and Staub, 2002;Xing Fang et al, 2004;Munshi et al, 2006;Mule et al, 2011;Sarkar and Sirohi, 2011;Singh et al, 2011;Olfati et al, 2012;Ene et al, 2018) and gynoecious sex expression (Wahid et al, 2003;Staub et al, 2005;Dey et al, 2010;Singh et al, 2011;Pati et al, 2015). Combining ability studies have been conducted by Adel and Ali (2013) Golabadi et al (2015) and Ene et al (2018), but these authors used elite parental lines to make crosses.…”