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Inheritance of Tip Sterility in Relation to Auricle Pigmentation and Waxy Bloom in Three Crosses of Hexaploid Wheat (triticum Aestivum L.)

R. PARVEEN
M. Sc. Student
Dept. of Botany, University of Rajshahi, Rajshahi

M. M. UD-DEEN
Associate Professor
Dept. of Crop Science & Technology, University of Rajshahi, Rajshahi,

G. KABIR
Professor
Dept. of Botany, University of Rajshahi, Rajshahi, Bangladesh.

Abstract/ Executive Summary:

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.

Location:

Start Date:

End Date:

Program Area: Crop-Soil-Water Management

Commodity: Wheat

Objectives:

The present study was conducted with this tip sterile line of wheat and its progenies to know its mode of inheritance.

Methodology:

Seeds of three Bangladeshi varieties and one tip sterile selected line of hexaploid wheat (Triticum aestivum L.) along with their hybrid progenies were used as plant material. These seeds were supplied from Cytogenetics Laboratory, Department of Botany, University of Rajshahi, Rajshahi, Bangladesh. A short description of the experimental materials is given below: The plants of each variety or lines and their hybrid progenies were grown in the experimental field of Rajsbahi University following recommended agronomic practices. The field was laid out in a split-plot design with three replications. Three crosses were placed in the main plots and replications in the subplots. Each subplot included 27 rows of plants, three rows for each parent, F1 and BC1, and 15 rows for F2 generations. Genotypes were assigned randomly to rows. Distance between the rows was 30 cm and between plants within rows was 10 cm. Each row was 1.10 m long and comprised 12 plants. The space between plots and around the field was 50 cm. Each plot size was 7.8 × 1.1 m and the field was 8.8 × 5.5 m and surrounded by one non-experimental plants line. The mean values recorded against all the treatments were analyzed statistically.

Source of Information: Bangladesh J. Agril. Res. 35(3) : 535-541, September 2010 ISSN 0258-7122

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Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

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.

Knowledge Management: Journal