Inheritance of tip sterility in relation to auricle pigmentation and waxy bloom in three crosses of hexaploid wheat (Triticum aestivum L.)

Abstract

Two Bangladeshi varieties, Aghrani and Ananda were found with normal spikes, pink auricle and non-waxy blooms. The variety Akbar resembled these characters except the auricle colour, where it was white. On the contrary, the selected line FM-147 was found with tip sterile, white auricle, and waxy bloom characters. The F₁s in three different crosses (AG × FM-147, AN × FM-147) were found with normal spikes, white auricle, and non-waxy bloom. The F₁ population of three crosses were found to segregate in the proportion of 3:1 with normal and tip sterile plants. Backcross progenies were found to segregate into 1:1 ratio with normal and tip sterile plants. These results indicated that a recessive gene controls the tip sterility. The auricle pigmentation in F₂s of the crosses between AG × FM-147 and AN × FM- 147 was found to show the ratio 3:1 with auricle of pink and white pigmentation. Backcross progenies showed also the ratio 1:1. The inheritance of auricle pigmentation was also found to be governed by a single recessive gene. The F₂s in three crosses showed the ratio 3:1 with waxy bloom and non- waxy bloom. Backcross progenies showed also the ratio 1:1 for these two characters. The F₂ populations for two characters at a time were found to segregate into a dihybrid ratio of 9:3:3:1 indicating the absence of any linkage between these two characters.

Keywords: Inheritance; tip sterility; hexaploid wheat.

DOI: 10.3329/bjar.v35i3.6460

Bangladesh J. Agril. Res. 35(3) : 535-541