Diallel analysis of maize inbred lines for carotenoids and grain yield

Abstract

Vitamin A deficiency causes xerophthalmia in preschool-aged children worldwide. The objective of this study was to estimate the genetic parameters that would be useful in selecting parent plants for developing productive hybrids with higher levels of provitamin A in the maize kernel. A complete 7 9 7 diallel mating scheme was used to generate 21 single-cross hybrids. The F 1 crosses and check hybrids were evaluated in complete block design across three different Brazilian environments, and carotenoid content was analyzed by high performance liquid chromatography. General combining ability effects were significant for all traits except a-carotene This result indicates that the contribution of the additive effect was more important for provitamin A and other carotenoids and, consequently that there is high chance of improving this trait through recurrent selection methods. Line 3 produced the highest level of kernel provitamin A among the inbred lines evaluated and also demonstrated the potential to contribute to the development of genetic materials with a good performance for provitamin A. Inbred lines 1, 6, and 7 showed a higher concentration of favorable alleles for grain yield, and inbred lines 3 and 6 exhibited a higher concentration of favorable alleles for b-carotene. Hybrid 1 9 3 performed well in terms of provitamin A and grain yield and combination 2 9 3 was the best performer in terms of lutein content.

Genetic analyses of kernel carotenoids in novel maize genotypes possessing rare allele of β-carotene hydroxylase gene

“…Preponderance of additive gene action than the non-additive action for carotenoids in maize was also reported in the earlier studies (Egesel et al 2003;Senete et al 2011;Suwarno et al 2014). The predominance of additive gene action led to high to moderate narrow sense heritability for the kernel carotenoids.…”

“…Information on combining ability and nature of gene action for kernel carotenoids in maize are limited and those involved traditional maize germplasm mainly adapted to US and Brazil (Egesel et al 2003;Senete et al 2011). Suwarno et al (2014) have undertaken genetic analyses of carotenoids among maize inbreds possessing favourable allele of crtRB1.…”

Genetic variability for carotenoid content of grains in a composite maize population

“…Similar magnitudes of Iv were estimated for the two sets (0.57 in Set 1; 0.60 in Set 2), averaging 0.58 in the pooled analysis. This estimate is slightly higher (Iv = 0.49) than that reported by Senete et al (2011).…”

Daya Gabung Inbred Jagung Pulut untuk Pembentukan Varietas Hibrida

“…DGU yang nyata menurut Musila et al (2010) mengindikasikan adanya efek gen aditif, dimana setiap tetua pembentuk berkontribusi dalam meningkatkan hasil F1. Efek DGK yang nyata pada peubah hasil biji menunjukkan adanya pengaruh kuat gen-gen nonaditif (Senete et al 2011, Long et al 2004. Hasil penelitian ini menunjukkan bahwa hasil biji dipengaruhi oleh efek gen-gen nonaditif yang lebih kuat dibandingkan dengan gen aditif.…”

“…Penelitian telah banyak dilakukan pada jagung Quality Protein Maize (QPM) yang menerapkan analisis dialel dengan fokus pada hasil biji, komponen hasil (Bhatnagar et al 2004), dan uji adaptasi QPM umur genjah pada kondisi agroklimat tertentu (Musila et al 2010). Pemuliaan untuk tujuan biofortifikasi kandungan karotenoid tinggi juga telah banyak menggunakan analisis dialel (Run et al 2013, Senete et al 2011, Egesel et al 2003.…”