Development of path indices for enhancing sugarcane selection program

Amjad Ali

doi:10.19045/bspab.2021.100113

Abstract

The present investigation was carried out to develop path index using the relationship of contributing traits and cane yield. Development of path indices using linear regression equation followed by path analysis tells about the relationship of the dependent and independent parameters and better performing genotype can be selected. The study was conducted at sugar crops research institute Mardan during 2012-13 and 2013-14 on two plant crops. The experiments were arranged in RCB Design with three replications using 14 sugarcane genotypes with two check cultivars (Mardan-93 and CP/77-400). Path analysis showed that number of millablecane (0.39), internodes length (0.32), number of nodes (0.14), plant height (0.13) and number of tillers (0.12) had the direct positive effect on cane yield on phenotypic level. In case of genotypic level number of millablecane (0.63), plant height (0.42) and number of tillers (0.21) had the highest direct positive effect on cane yield. This showed that these characters are the most essential constituents of cane yield. Genotype MS-91-CP-523(240.39) followed by S-92-US-72 (205.21) have the highest path index values and performed better than the rest of the genotype. The parameters having direct effect on cane yield must be given more importance in the breeding and selection strategies. Research should be focused on the selection of genotypes which has good performance both under plant and ratoon crops conditions. The genotypes with good performance may be tested further. Keywords: Direct and indirect effect; Path coefficients; Plant crop; Selection criteria http://dx.doi.org/10.19045/bspab.2021.100113

Highlights

The present investigation was carried out to develop path index using the relationship of contributing traits and cane yield
The study was conducted to study the interrelation of different characters on cane yield and select a superior genotype by adopting the selection criteria based on path coefficient analysis
Two genotypes were selected for future breeding programme on the basis of high path indices i.e. MS-91-CP-523(240.39) followed by S-92-US-72 (205.21) and performed better than the rest of the genotype

Summary

Introduction

The present investigation was carried out to develop path index using the relationship of contributing traits and cane yield. Research should be focused on the selection of genotypes which has good performance both under plant and ratoon crops conditions. In breeding sugarcane thousands of seedlings about the associations that occur among the are produced and evaluated from crosses different traits and cane yield is important.

Results

Conclusion