#combining ability

HETEROSIS AND COMBINING ABILITY FOR GRAIN YIELD AND OTHER AGRONOMIC TRAITS IN PEARL MILLET (Pennisetum americanum (L.) Leeke)

Abstract:

Heterosis and combining ability for grain yield and other agronomic traits in 16 pearl millet hybrids were studied at Bengou and Maradi, Niger Republic, using the crosses obtained from two heterotic groups (Group A: Guerguera, HKB, HKP GMS, Souna3 and Group B:…

LINE X TESTER ANALYSIS FOR COMBINING ABILITY IN SORGHUH (SORGHUM BICQLOR (L.) MOENCH)

TABLE OF CONTENT Title page- – – – – – – – – i Approval page – – – – – – – -ii Dedication – – – – – – – – -iii Acknowledgement – – – – – – – -iv Abstract – – – – – – – – – -v Table of content – – – – – – – -vi

CHAPTER ONE INTRODUCTION – – – – – – – -1 1.0 Background of the study – – – – -1 1.1 Statement of the…

COMBINING ABILITY AND HETEROSIS FOR GRAIN YIELD, PROTEIN CONTENT AND OTHER AGRONOMIC CHARACTERS IN PEARL MILLET {Pennisetum glaucum (L.) R. Br.)

Abstract:

Fifty-seven F1 hybrids obtained by crossing three varieties, of diverse genetic background, onto each of 19 inbred lines of pearl millet were evaluated in two locations. Mean grain yield ranged from 667.50 – 2249.20 kg/ha with a grand mean =…

The aim of this study was to identify parents and promising hybrid combinations for the improvement of Citrullus mucosospermus (Fursa). 12 F1 hybrids obtained from a 4x4 full diallel crossing along with their parental lines (Bebu (B), Wlêwlê small seeds 1 (Wss1), Wlêwlê small seeds 2 (Wss2) and Wlêwlê small seeds 3 (Wss3)) were evaluated. The experimental design was a randomized complete block design with three replications. Results showed that hybrids having one parent Bebu, expressed significant positive heterosis effect relative to mid-parental values for characters’ fruit weight, fruit diameter and fruit volume. Combined analysis of variances for all investigated traits showed significant (P˂0.001) mean squares of GCA and SCA for all studied traits, indicating the involvement of both additive and non-additive gene actions in the inheritance of these traits. Non-additive gene effects were predominant for all studied traits. Bebu appeared the best general combiner for FMp, FW, FD and FV while, Wss2 and Wss3 were the best general combiner for NF. Therefore, there were suggested for their incorporation into C. mucosospermus breeding programs, in order to accumulate their favorable genes responsible for increasing fruit yield in promising pure lines. Crosses Wss1×Wss2 and Wss2×Wss3 showed significant SCA effects for NF while, crosses B x Wss1, Wss1 x B, B x Wss2, Wss2 x B, B x Wss3 and Wss3 x B presented significant positive values of SCA for FW, FD and FV. Progeny B×Wss2 had recorded a negative value of SCA for FMp. These promising crosses with significant SCA effects could be included in C. mucosospermus breeding programs, which could be advanced further for the isolation of transgressive segregants in order to develop good inbred lines.  

Author(s) Details

Kouakou Fulgence Brou Laboratoire de Biologie et Amélioration des Productions Végétales, Université Nangui Abrogoua, 02 BP 801 Abidjan 02, Côte d'Ivoire.

Raoul Sylvère Sie Laboratoire de Biologie et Amélioration des Productions Végétales, Université Nangui Abrogoua, 02 BP 801 Abidjan 02, Côte d'Ivoire.

Koffi Adjoumani Ecole Normale Supérieure d‟Abidjan, Côte d'Ivoire.

Dr. Yao Didier Martial Saraka Université Peleforo Gon Coulibaly (UPGC), UFR Sciences Biologiques, Korhogo, Côte d'Ivoire.

Badie Arnaud Kouago Laboratoire de Biologie et Amélioration des Productions Végétales, Université Nangui Abrogoua, 02 BP 801 Abidjan 02, Côte d'Ivoire.

Cynthia Deborah Adahi Laboratoire de Biologie et Amélioration des Productions Végétales, Université Nangui Abrogoua, 02 BP 801 Abidjan 02, Côte d'Ivoire.

Abstract

Studies on tomato post-harvest losses are the main concern for its production, hence a study was conducted to evaluate 10 hybrids along with two checks for fruit shelf life and yield components. For improvement of shelf life of commercial varieties, we used four commercial varieties and one germplasm were crossed with two testers in line × tester mating fashion to study combining ability effects and heterosis for plant height, number of branches, fruit per cluster, single fruit weight, total number of fruits per plant, fruit shelf life and total yield per plant during summer 2014 at UAS, GKVK, Bangalore, India. The analysis of variance revealed the variance due to lines effects and crosses were highly significant for fruit shelf life (days). In respect of GCA effects, Arka Alok observed highest for shelf life and L121 for total yield per plant. Among the crosses, Vaibhav ×RIL-160 and L121×RIL-108 were the most valuable combiners for fruit shelf life and total yield per plant. Thus, these two cross combinations revealed good potential to be used as a hybrid. The highest heterotic effect over mid parent was exhibited by the cross Vaibhav×RIL-160, Arka Alok×RIL-160 and Arka Alok×RIL-108 for both characters. We also observed the mean performance of fruit shelf life of all the crosses were significantly differed with lines. The RIL-160 and RIL-108 both testers can be recommended for improving the fruit shelf-life and cross can be forwarded to multilocation trial.

Get the original articles in Source: Estimation of heterosis and combining ability in tomato for fruit shelf life and yield component traits using line x tester method

Journal Name: International Journal of Agronomy and Agricultural Research (IJAAR)