Seed Germination in Relation to Total Sugar and Starch in Endosperm Mutant of Sweet Corn Genotypes

Abstract

The use of combinations of two or more genes controlling carbohydrate characters of corn is an attractive way to improve table quality of sweet corn. Poor seed quality of the inbred lines hinders the progress of this strategy for hybrid seed production. The objective of this study was to evaluate sweet corn inbred lines with combinations of double and triple recessive genes for germination percentage, seed vigor, total sugar content, and starch content. Eleven sweet corn genotypes including seven inbred lines (F6 generation) with different combinations of genes controlling carbohydrate characters and four F1 hybrids were used. The germination experiment was conducted under standard test between papers (BP) and accelerated aging (AA) test. The data were recorded for germination percentage, germination speed, normal and abnormal seedling, seedling length, and seedling dry weight. The seeds were analyzed for total sugar and starch content in endosperm at maturity stage. The results showed that single recessive genotype (sh2sh2) had high germination percentage and seedling vigor. The combinations of bt or sh2 gene with wx gene resulted in low germination percentage and poor seedling vigor. However, combinations of triple recessive genes (btbt sh2sh2 wxwx) had good germination in BP test but they performed poorly in AA test.

Effects of Mass Selection on Husk and Cob Color in Five Purple Field Corn Populations Segregating for Purple Husks

“…However, early mature genotypes can have higher yield than late mature genotypes in some cases. In maize, early mature hybrids with higher seedling strength had higher grain yield than late mature genotypes with poor seed vigor [62], and the genotypes with early maturity and resistance to late season drought had higher grain yield than late maturing genotypes [63].…”

Sementes de milho doce tratadas: substratos para o teste de germinação e sanidade

“…Conceituado como o conjunto de atributos que confere à semente a capacidade para germinar, emergir e resultar rapidamente em plântulas normais, o vigor influencia, geralmente, no estabelecimento de uma população de plantas adequada sobre variações de condições ambientais (Marcos Filho, 2017). Contudo, para cultura do milho doce, estudos revelam um efeito prejudicial do açúcar na germinação de suas sementes, afetando a emergência à campo, a qual não apresenta correlação positiva com o teor de açúcar em sementes secas (Pairochteerakul, 2018).…”

Changes on Sugar and Starch Contents during Seed Development of Synergistic Sweet Corn and Implication on Seed Quality

“…However, the adverse effects on seed qualities were found in sweet corn genotypes with two or more recessive genes controlling sugar synthesis. Pairochteerakul et al [11] reported that incorporations of either bt 2 or sh 2 gene into wx background resulted in low germination percentage and poor seedling vigor. is situation would be unfavorable for hybrid seed production.…”