Document Type : Original Article
Author
Onion Research Dept., Field Crops Research Institute, ARC, Giza Egypt
Abstract
This study was conducted during the three successive seasons, 2016/ 2017, 2017/2018 and 2018/2019 at Giza Research Station, Onion Research Department, Field Crops Research Institute, Agriculture Research Center, Ministry of Agriculture. The objective of the study was evaluating eight onion genotypes and their crosses to forming new improved composites and bi-parental onion populations.
Eight onion genotypes included six exotic onion genotypes and two Egyptian onion cultivars. The eight genotypes were selected as wide diverse genotypes and representing a broad genetic base were used as parent seed to forming a new improved composites or bi-parental populations. The 8 parents and their 16 crosses were evaluated in two seasons in field experimental trial; RCBD with three replicates was used.
Genotypes (parents and their crosses) were significantly differed for all studied traits (number of days to maturity, total, marketable and culls yield ton/fed, percentage of total soluble solids %, dry matter content% and total weight loss%. The lowest number of days to maturity was observed for parents P6, P2 and P3, for composites in C6 and C3 and for bi –parental in B3, B2 and B6.
The highest total yield was recorded for parents by P8 and P7, for composites with C4, C7 and C1 and for bi –parental with B8, B7 and B4. The highest marketable yield was detected for parents with P7, P3 and P6, for composites with C4, C1 and C7 and for bi –parental with B7 and B4. The lowest culls yield was shown for parents with P1, P4 and P3, for composites with C3, C6 and C5 and for bi –parental with B7, B5 and B2.
Highest values of TSS% were exhibited by parents P5, P7 and P8, for composites C8, C6 and C7, for bi–parental B7, B8 and B1. The highest values of dry matter % were observed with parents P5, P7 and P8, for composites C8, C7 and C5 and for bi–parental B7, B1 and B8.
The lowest values of total weight loss% were detected for parents, P5 and P1, for composites, C5 and C8, and for bi–parental, B3, B5 and B7.
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