Analysis of Genes for Stigma Coloration in Rice - IRRI books

Table 6. Segregation for spikelet fertility in F 2 population under field conditions.
(30°27' N), China, 1989.
Wuhan
Sterile Semisterile Fertile Ratio of Male
Plants plants plants (30- plants steriles sterile
Cross counted (0-30%) 60%) seed (60-100%) to non- plants
(no.) seed set set (no.) seed set steriles (%)
(no.) (no.) in F 2
NK58s/02428
NK58s/Lm u
NK58s/Lm e
005s/Zhe Geng
152
159
250
111
10
10
7
32
22
14
17
29
120
135
226
50
1:14.2
1:14.9
1:34.7
1:2.46
6.6
6.3
2.8
28.8
Table 7. Classification of the Nongken 58s/02428 F 2 plants by seed set (%).
Median value
of group
Plants
(no.)
Median value
of group
Plants
(no.)
0.5 5 55 13
5 10 65 7
15 10 75 17
25 7
85 21
35 10
95 5
45 6
5. Distribution of Nongken 58s/02428 F 2 plants by seed set.
interpretation have been proposed with one, two, or more pairs of genes involved. It
seems that photoperiod-conditioned male sterility is inherited as a quantitativequalitative
character. For the present, we assume that it is controlled by a single gene
for photoperiod responsiveness and a set of genes regulating the metabolism of
uninucleate microspores, the effects of which are cumulative.
Photoperiod-conditioned male sterility and its inheritance 225